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- Compositae (33 071)
- Subfamily Asteroideae (Cass.) Lindl. (19 091)
- Tribe Ambrosieae Cass. accepted as Ambrosiinae Less.
- Tribe Anthemideae Cass. (1 976)
- Tribe Astereae Cass. (3 633)
- Tribe Athroismeae Panero (82)
- Tribe Bahieae B.G.Baldwin (86)
- Tribe Bellideae Cass. ex D.Don accepted as Astereae Cass.
- Tribe Bellieae DC. ex Godr. accepted as Bellidinae Willk.
- Tribe Bidentideae Godr. accepted as Coreopsideae Lindl.
- Tribe Calenduleae Cass. (121)
- Tribe Chaenactideae B.G.Baldwin (21)
- Tribe Chrysthellinae Ryding & K.Bremer accepted as Chrysanthellinae Ryding & K.Bremer
- Tribe Coreopsideae Lindl. (527)
- Tribe Cotuleae Lowe accepted as Anthemideae Cass.
- Tribe Doroniceae Panero (39)
- Tribe Eupatorieae Cass. (2 752)
- Subtribe Adenostemmatinae B.L.Rob.
- Subtribe Ageratinae Less.
- Subtribe Alomiinae Less.
- Subtribe Ayapaninae R.M.King & H.Rob.
- Subtribe Critoniinae R.M.King & H.Rob.
- Subtribe Disynaphiinae R.M.King & H.Rob.
- Subtribe Eupatoriinae Dumort. (117)
- Genus Eupatorium Tourn. ex L. (112)
- Subgenus Eupatorium subg. Gyptis Cass. accepted as Gyptis (Cass.) Cass.
- Section Eupatorium sect. Austrobrickellia (R.M.King & H.Rob.) Cabrera accepted as Austrobrickellia R.M.King & H.Rob.
- Section Eupatorium sect. Austrobrickellia (R.M.King & H.Rob.)
- Section Eupatorium sect. Austroeupatorium (R.M.King & H.Rob.) Cabrera accepted as Austroeupatorium R.M.King & H.Rob.
- Section Eupatorium sect. Campovassouria (R.M.King & H.Rob.) Cabrera accepted as Campovassouria R.M.King & H.Rob.
- Section Eupatorium sect. Campuloclinium (DC.) Benth. accepted as Campuloclinium DC.
- Section Eupatorium sect. Campuloclinium (DC.) Benth. ex Baker accepted as Campuloclinium DC.
- Section Eupatorium sect. Chromolaena (DC.) Benth. ex Baker accepted as Chromolaena DC.
- Section Eupatorium sect. Cylindrocephala DC. accepted as Chromolaena DC.
- Section Eupatorium sect. Dalea Loudon accepted as Eupatorium Tourn. ex L.
- Section Eupatorium sect. Dimorpholepis G.M.Barroso accepted as Grazielia R.M.King & H.Rob.
- Section Eupatorium sect. Disynaphia (Hook. & Arn. ex DC.) Cabrera accepted as Disynaphia Hook. & Arn. ex DC.
- Section Eupatorium sect. Gyptis (Cass.) Cabrera accepted as Neocabreria R.M.King & H.Rob.
- Section Eupatorium sect. Gyptis Cass.
- Section Eupatorium sect. Hebeclinium (DC.) Benth. ex Baker accepted as Hebeclinium DC.
- Section Eupatorium sect. Heterocondylus (R.M.King & H.Rob.) Cabrera accepted as Neocabreria R.M.King & H.Rob.
- Section Eupatorium sect. Heterocondylus R.M.King & H.Rob.
- Section Eupatorium sect. Heterolaena (Sch.Bip. ex Benth. & Hook.f.) Baker accepted as Chromolaena DC.
- Section Eupatorium sect. Heterolepis Baker accepted as Eupatorium Tourn. ex L.
- Section Eupatorium sect. Laevia Cabrera accepted as Chacoa R.M.King & H.Rob.
- Section Eupatorium sect. Macropodina (R.M.King & H.Rob.) Cabrera accepted as Macropodina R.M.King & H.Rob.
- Section Eupatorium sect. Microstemon Cabrera accepted as Fleischmannia Sch.Bip.
- Section Eupatorium sect. Osmia (Sch.Bip.) Benth. ex Baker accepted as Chromolaena DC.
- Section Eupatorium sect. Praxelis (Cass.) Benth. ex Baker accepted as Praxelis Cass.
- Section Eupatorium sect. Pteropoda DC. accepted as Eupatorium Tourn. ex L.
- Section Eupatorium sect. Raulinoreitzia (R.M.King & H.Rob.) Cabrera accepted as Raulinoreitzia R.M.King & H.Rob.
- Section Eupatorium sect. Sphaereupatorium O. Hoffm. In accepted as Sphaereupatorium (O.Hoffm.) Kuntze ex B.L.Rob.
- Section Eupatorium sect. Sphaereupatorium O.Hoffm. accepted as Sphaereupatorium (O.Hoffm.) Kuntze ex B.L.Rob.
- Section Eupatorium sect. Steyermarkina (R.M.King & H.Rob.) Cabrera accepted as Steyermarkina R.M.King & H.Rob.
- Section Eupatorium sect. Subimbricata Hoffm. accepted as Eupatorium Tourn. ex L.
- Section Eupatorium sect. Symphyopappus (Turcz.) Cabrera accepted as Symphyopappus Turcz.
- Section Eupatorium sect. Urolepis (DC.) Benth. accepted as Urolepis (DC.) R.M.King & H.Rob.
- Section Eupatorium sect. Urolepis (DC.) Benth. ex Baker accepted as Urolepis (DC.) R.M.King & H.Rob.
- Section Eupatorium sect. Verticillatum DC. accepted as Eutrochium Raf.
- Species Eupatorium ×tawadae Kitam. ex Masam.
- Species Eupatorium aboriginum Greene accepted as Ageratina altissima (L.) R.M.King & H.Rob.
- Species Eupatorium abronium Klatt accepted as Ageratina prunellaefolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium achillaea Chodat accepted as Disynaphia achillaea (Chodat) R.M.King & H.Rob.
- Species Eupatorium achillea Chodat accepted as Disynaphia multicrenulata (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium acuminatum Hook. & Arn. accepted as Neocabreria serrulata (DC.) R.M.King & H.Rob.
- Species Eupatorium acuminatum Spreng. ex DC. accepted as Vernonia saligna (Roxb.) DC.
- Species Eupatorium acuminatum Kunth accepted as Critoniella acuminata (Kunth) R.M.King & H.Rob.
- Species Eupatorium acuminatum D.Don accepted as Vernonia divergens (DC.) Edgew.
- Species Eupatorium acutidentatum B.L.Rob. accepted as Ageratina acutidentata (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium adamantium Gardner
- Species Eupatorium adamantium Gardner accepted as Koanophyllon adamantium (Gardner) R.M.King & H.Rob.
- Species Eupatorium adenachaenium Sch.Bip. ex Klatt accepted as Ageratina adenachaenia (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium adenachenium Sch.Bip. ex Hook.f. & Jacks.
- Species Eupatorium adenachenium Sch.Bip. ex Klatt
- Species Eupatorium adenanthum Gardner ex Baker
- Species Eupatorium adenanthum DC. accepted as Trichogoniopsis adenantha (DC.) R.M.King & H.Rob.
- Species Eupatorium adenochaetum Sch.Bip. ex Hemsley accepted as Ageratina adenachaenia (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium adenochaetum Sch.Bip. ex Hemsl. accepted as Ageratina adenachaenia (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium adenolepis Sch.Bip. ex Baker accepted as Chromolaena adenolepis (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium adenophorum Hort.Berol. ex Kunth
- Species Eupatorium adenophorum Spreng. accepted as Ageratina adenophora (Spreng.) R.M.King & H.Rob.
- Species Eupatorium adenospermum (ex Seemann) Sch.Bip. accepted as Dyscritogyne adenosperma (Sch.Bip.) R.M.King & H.Rob.
- Species Eupatorium adspersum Klatt ex T.Durand & Pittier
- Species Eupatorium adspersum Klatt accepted as Ageratina anisochroma (Klatt) R.M.King & H.Rob.
- Species Eupatorium aegirophyllum B.L.Rob. accepted as Ageratina aegirophylla (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium aequinoctiale B.L.Rob. accepted as Fleischmannia obscurifolia (Hieron.) R.M.King & H.Rob.
- Species Eupatorium affine Wender.
- Species Eupatorium affine Hook. & Arn. accepted as Chromolaena odorata (L.) R.M.King & H.Rob.
- Species Eupatorium affine Mairet ex DC. accepted as Acourtia hebeclada DC.
- Species Eupatorium affine Kunth accepted as Ophryosporus chilca (Kunth) Hieron.
- Species Eupatorium africanum Oliv. & Hiern accepted as Stomatanthes africanus (Oliv. & Hiern) R.M.King & H.Rob.
- Species Eupatorium africanum Oliv. & Hieron. accepted as Stomatanthes africanus (Oliv. & Hiern) R.M.King & H.Rob.
- Species Eupatorium ageratifolium DC. accepted as Ageratina havanensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium ageratoides L.f. accepted as Ageratum altissima (L.) R.M.King & H.Rob.
- Species Eupatorium ageratoides Bertero ex DC. accepted as Ageratina havanensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium agrigaudium Cabrera accepted as Heterocondylus reitzii R.M.King & H.Rob.
- Species Eupatorium albertinae Ant.Molina accepted as Campuloclinium macrocephalum (Less.) DC.
- Species Eupatorium albertinae A.Molina accepted as Campuloclinium macrocephalum (Less.) DC.
- Species Eupatorium albertosmithii B.L.Rob. accepted as Critoniella albertosmithii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium albescens Gardner accepted as Austroeupatorium silphiifolium (Mart.) R.M.King & H.Rob.
- Species Eupatorium albicaule Sch.Bip. ex Hemsl. accepted as Koanophyllon albicaulis (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium albicaule Sch.Bip. ex Hemsley accepted as Koanophyllon albicaulis (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium albicaule Sch.Bip. ex Klatt accepted as Koanophyllon albicaulis (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium albifrons (L.f.) E.H.L.Krause accepted as Adenostyles alliariae (Gouan) A.Kern.
- Species Eupatorium albifrons E.H. Krause accepted as Adenostyles alliariae (Gouan) A.Kern.
- Species Eupatorium albissimum Hassl. accepted as Disynaphia albissima (Hassl.) R.M.King & H.Rob.
- Species Eupatorium album L.
- Species Eupatorium album Hemsl.
- Species Eupatorium album Hemsley
- Species Eupatorium album Thunb. accepted as Eupatorium chinense L.
- Species Eupatorium allaisii Sennen accepted as Eupatorium cannabinum L.
- Species Eupatorium allenii Standl. accepted as Ageratina allenii (Standl.) R.M.King & H.Rob.
- Species Eupatorium alpestre Gardner accepted as Grazielia serrata (Spreng.) R.M.King & H.Rob.
- Species Eupatorium alternans DC. accepted as Chromolaena laevigata (Lam.) R.M.King & H.Rob.
- Species Eupatorium alternifolium Sch.Bip.
- Species Eupatorium alternifolium Ard. accepted as Brickellia eupatorioides (L.) Shinners
- Species Eupatorium alternifolium Sch.Bip. ex Baker accepted as Gyptis crassipes (Hieron.) R.M.King & H.Rob.
- Species Eupatorium altiscandens McVaugh accepted as Neomirandea araliaefolia (Less.) R.M.King & H.Rob.
- Species Eupatorium altissimum L.
- Species Eupatorium altissimum (L.) Murray accepted as Ageratina altissima (L.) R.M.King & H.Rob.
- Species Eupatorium altissimum (L.) L. accepted as Ageratina altissima (L.) R.M.King & H.Rob.
- Species Eupatorium amabile Kitam.
- Species Eupatorium amambayense Cabrera
- Species Eupatorium amambayense Hassl.
- Species Eupatorium amarum Vahl accepted as Mikania parviflora (Aubl.) H.Karst.
- Species Eupatorium ambiguum Hook. accepted as Eupatorium serotinum Michx.
- Species Eupatorium amblyolaenum Sch.Bip. ex Baker accepted as Campovassouria cruciata (Vell.) R.M.King & H.Rob.
- Species Eupatorium amblyolepis B.L.Rob. accepted as Ageratina amblyolepis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium americanum Hill accepted as Eupatorium dubium Willd. ex Poiret
- Species Eupatorium amethystinum B.L.Rob. accepted as Aristeguietia gascae (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium amoenum Pursh accepted as Eupatorium dubium Willd. ex Poiret
- Species Eupatorium amori Cuatrec. accepted as Ophryosporus heptanthus (Sch.Bip. ex Wedd.) R.M.King & H.Rob.
- Species Eupatorium amorii Cuatrec.
- Species Eupatorium amphidyctium DC. accepted as Heterocondylus amphidyctius (DC.) R.M.King & H.Rob.
- Species Eupatorium amplifolium A.Gray accepted as Ageratina rubricaulis (Kunth) R.M.King & H.Rob.
- Species Eupatorium amplum Benth. accepted as Ageratina ampla (Benth.) R.M.King & H.Rob.
- Species Eupatorium amygdalinum Lam. accepted as Ayapana amygdalina (Lam.) R.M.King & H.Rob.
- Species Eupatorium anachoreticum B.L.Rob. accepted as Chromolaena anachoretica (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium anastomosans DC. ex Steud.
- Species Eupatorium anastomosans DC. ex Steudel. accepted as Critonia aromatisans (DC.) R.M.King & H.Rob.
- Species Eupatorium anchisteum Grashoff & Beaman accepted as Ageratina anchistea (Grashoff & Beaman) R.M.King & H.Rob.
- Species Eupatorium andinum B.L.Rob. accepted as Ayapanopsis andina (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium anethifolium DC. accepted as Mikania anethifolia (DC.) Matzenb.
- Species Eupatorium angosturae Pol. accepted as Erechtites valerianifolius (Link ex Wolf) Less. ex DC.
- Species Eupatorium angulare B.L.Rob. accepted as Neomirandea angularis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium angulicaule Lasser & Maguire accepted as Guayania yaviana (Lasser & Maguire) R.M.King & H.Rob.
- Species Eupatorium angulicaule Sch.Bip. ex Baker accepted as Austrocritonia angulicaulis (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium angulicaulis Lasser & Maguire accepted as Guayania yaviana (Lasser & Maguire) R.M.King & H.Rob.
- Species Eupatorium angulifolium B.L.Rob. accepted as Eupatoriastrum angulifolium (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium angulosum Glaz. accepted as Heterocondylus grandis (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium angustatum (A.Gray) Greene accepted as Ageratina altissima var. altissima (L.) R.M.King & H.Rob.
- Species Eupatorium angusticeps Malme accepted as Chromolaena angusticeps (Malme) R.M.King & H.Rob.
- Species Eupatorium angustifolium (Kunth) Spreng. accepted as Ageratina asclepiadea (L.f.) R.M.King & H.Rob.
- Species Eupatorium angustilobum (Y.Ling) C.Shih, S.Y.Jin & S.R.Chen
- Species Eupatorium angustissimum Spreng. ex Baker accepted as Pseudobrickellia angustissima (Spreng. ex Baker) R.M.King & H.Rob.
- Species Eupatorium anisochromum Klatt ex T.Durand & Pitt. accepted as Ageratina anisochroma (Klatt) R.M.King & H.Rob.
- Species Eupatorium anisochromum Klatt accepted as Ageratina anisochroma (Klatt) R.M.King & H.Rob.
- Species Eupatorium anisodontum B.L.Rob. accepted as Aristeguietia gascae (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium anisopodum B.L.Rob. accepted as Fleischmannia anisopoda (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium anomalum Nash
- Species Eupatorium antiquorum Standl. & Steyerm. accepted as Fleischmannia antiquorum (Standl. & Steyerm.) R.M.King & H.Rob.
- Species Eupatorium apense Chodat accepted as Austroeupatorium apensis (Chodat) R.M.King & H.Rob.
- Species Eupatorium apiculatum Gardner accepted as Barrosoa apiculata (Gardner) R.M.King & H.Rob.
- Species Eupatorium apollinairei B.L.Rob. accepted as Ageratina apollinairei (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium appendiculatum Less. ex Baker accepted as Urolepis hecatantha (DC.) R.M.King & H.Rob.
- Species Eupatorium arachnoideum Legname accepted as Critonia arachnoidea (Legname) R.M.King & H.Rob.
- Species Eupatorium arakianum Murata & H.Koyama
- Species Eupatorium araliaefolium Less. accepted as Neomirandea araliaefolia (Less.) R.M.King & H.Rob.
- Species Eupatorium araliifolium Less. accepted as Neomirandea araliifolia (Less.) R.M.King & H.Rob.
- Species Eupatorium arborescens M.E.Jones accepted as Koanophyllon palmeri (A.Gray) R.M.King & H.Rob.
- Species Eupatorium arboreum Kunth accepted as Aristeguietia arborea (Kunth) R.M.King & H.Rob.
- Species Eupatorium arboreum Reinw. ex de Vriese accepted as Cyanthillium cinereum (L.) H.Rob.
- Species Eupatorium arboreum Reinw. ex Vriese accepted as Cyanthillium cinereum (L.) H.Rob.
- Species Eupatorium arbutifolium Benth. accepted as Ageratina arbutifolia (Benth.) R.M.King & H.Rob.
- Species Eupatorium arcuans B.L.Rob. accepted as Asplundianthus arcuans (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium arechavaletae Baker accepted as Vernonia echioides Less.
- Species Eupatorium areniscophilum Cabrera
- Species Eupatorium areolare DC. accepted as Piptothrix areolaris (DC.) R.M.King & H.Rob.
- Species Eupatorium areolatum Perr. ex DC. accepted as Piptothrix areolaris (DC.) R.M.King & H.Rob.
- Species Eupatorium argenteum Wall. accepted as Eupatorium cannabinum L.
- Species Eupatorium argentinum Ariza
- Species Eupatorium argutum Kunth accepted as Fleischmannia arguta (Kunth) B.L.Rob.
- Species Eupatorium aristei B.L.Rob. accepted as Ageratina aristei (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium aristei (B.L.Rob.) R.M.King & H.Rob. accepted as Ageratina aristei (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium arizonicum (A.Gray) Greene accepted as Ageratina herbacea (A.Gray) R.M.King & H.Rob.
- Species Eupatorium arizonicum (A.Gray) A.Nelson accepted as Ageratina herbacea (A.Gray) R.M.King & H.Rob.
- Species Eupatorium armanii Balb. accepted as Clibadium armanii (Balb.) Sch.Bip. ex O.E.Schulz
- Species Eupatorium arnottianum Griseb. accepted as Chromolaena arnottiana (Griseb.) R.M.King & H.Rob.
- Species Eupatorium arnottii Baker accepted as Austrobrickellia arnottii (Baker) R.M.King & H.Rob.
- Species Eupatorium aromaticum Sieber ex Steud.
- Species Eupatorium aromaticum Sieber ex Sieber ex Steudel accepted as Brickellia diffusa (Vahl) A.Gray
- Species Eupatorium aromaticum L. accepted as Ageratina aromatica (L.) Spach
- Species Eupatorium aromatisans DC. accepted as Critonia aromatisans (DC.) R.M.King & H.Rob.
- Species Eupatorium arrayanum Gardner accepted as Chromolaena arrayana (Gardner) R.M.King & H.Rob.
- Species Eupatorium arsenei B.L.Rob. accepted as Ageratina arsenei (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium artemisiifolium Griseb. accepted as Gyptis artemisiifolia (Griseb.) R.M.King & H.Rob.
- Species Eupatorium arthrodes B.L.Rob. accepted as Neomirandea arthodes (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium articulatum Sch.Bip. ex Hieron. accepted as Ageratina pichinchensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium ascendens Sch.Bip. ex Baker accepted as Chromolaena ascendens (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium aschenbornianum S.Schauer accepted as Ageratina pichinchensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium asclepiadeum DC. accepted as Campovassouria cruciata (Vell.) R.M.King & H.Rob.
- Species Eupatorium asper Baker
- Species Eupatorium asperifolium Sch.Bip. accepted as Austroeupatorium silphiifolium (Mart.) R.M.King & H.Rob.
- Species Eupatorium asperrimum Sch.Bip. ex Baker
- Species Eupatorium asperulaceum Baker accepted as Praxelis asperulacea (Baker) R.M.King & H.Rob.
- Species Eupatorium asperum Roxb. accepted as Vernonia aspera (Roxb.) Buch.-Ham.
- Species Eupatorium astellerum B.L.Turner accepted as Ageratina miquihuana (B.L.Turner) R.M.King & H.Rob.
- Species Eupatorium atrescens B.L.Rob. accepted as Badilloa atrescens (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium atriplicifolium Vahl accepted as Chromolaena odorata (L.) R.M.King & H.Rob.
- Species Eupatorium atriplicifolium Hort. ex Lam. accepted as Chromolaena corymbosa (Aubl.) R.M.King & H.Rob.
- Species Eupatorium atrocordatum B.L.Rob. accepted as Ageratina atrocordata (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium atroglandulosum Alain accepted as Koanophyllon atroglandulosum (Alain) R.M.King & H.Rob.
- Species Eupatorium atromontanum Nelson accepted as Eupatorium maculatum L.
- Species Eupatorium atromontanum A.Nelson accepted as Eutrochium maculatum var. bruneri (A.Gray) E.E.Lamont
- Species Eupatorium atropurpureum Sessé & Moc. accepted as Vernonia alamanii DC.
- Species Eupatorium atrorubens G.Nicholson
- Species Eupatorium atrorubens (Lem.) N.E.Br. accepted as Bartlettina sordida (Less.) R.M.King & H.Rob.
- Species Eupatorium atrorubens (Lem.) accepted as Bartlettina sordida (Less.) R.M.King & H.Rob.
- Species Eupatorium aureoviride Chodat accepted as Gyptis vernoniopsis (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium auriculatum Vahl accepted as Senecio penicillatus (Cass.) Sch.Bip.
- Species Eupatorium auriculatum Hort. ex Lam. accepted as Senecio deltoideus Less.
- Species Eupatorium austerum B.L.Rob. accepted as Chromolaena austera (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium australe Thunb. accepted as Chromolaena laevigata (Lam.) R.M.King & H.Rob.
- Species Eupatorium australe Bartl. accepted as Ageratina glechonophylla (Less.) R.M.King & H.Rob.
- Species Eupatorium axillare ex DC.
- Species Eupatorium axillare (Torr. & A.Gray) Moc. & Sessé ex DC. accepted as Brickellia californica (Torr. & A.Gray) A.Gray
- Species Eupatorium axilliflorum Griseb. accepted as Ophryosporus axilliflorus (Griseb.) Hieron.
- Species Eupatorium ayapana Vent. accepted as Ayapana triplinervis (Vahl) R.M.King & H.Rob.
- Species Eupatorium aya-pana Vent. accepted as Ayapana triplinervis (Vahl) R.M.King & H.Rob.
- Species Eupatorium ayapanoides Griseb. accepted as Koanophyllon ayapanoides (Griseb.) R.M.King & H.Rob.
- Species Eupatorium azangaroense Sch.Bip.
- Species Eupatorium azangaroense Sch.Bip. ex Wedd. accepted as Ageratina glechonophylla (Less.) R.M.King & H.Rob.
- Species Eupatorium azureum DC. accepted as Tamaulipa azurea (DC.) R.M.King & H.Rob.
- Species Eupatorium baccharifolium Gardner accepted as Koanophyllon baccharifolium (Gardner) R.M.King & H.Rob.
- Species Eupatorium baccharoides Kunth accepted as Ageratina baccharoides (Kunth) R.M.King & H.Rob.
- Species Eupatorium bacleanum DC. accepted as Gyptis commersonii Cass.
- Species Eupatorium badium Klatt, T.Durand & Pitt.
- Species Eupatorium badium Klatt ex Klatt accepted as Ageratina badia (Klatt) R.M.King & H.Rob.
- Species Eupatorium bahamense Northr. accepted as Chromolaena bahamensis (Northr.) R.M.King & H.Rob.
- Species Eupatorium bahamense Northrop. accepted as Chromolaena bahamensis (Northr.) R.M.King & H.Rob.
- Species Eupatorium bahamense Urb. accepted as Chromolaena bahamensis (Northr.) R.M.King & H.Rob.
- Species Eupatorium bakerianum B.L.Rob. accepted as Austrobrickellia bakerianum (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium balansae Hieron. accepted as Bejaranoa balansae (Hieron.) R.M.King & H.Rob.
- Species Eupatorium ballii Oliv. accepted as Aristeguietia ballii (Oliv.) R.M.King & H.Rob.
- Species Eupatorium ballotaefolium Kunth accepted as Lourteigia ballotaefolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium ballotifolium Kunth accepted as Lourteigia ballotaefolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium bangii Rusby accepted as Chromolaena bangii (Rusby) R.M.King & H.Rob.
- Species Eupatorium barahonense Urb. accepted as Koanophyllon barahonense (Urb.) R.M.King & H.Rob.
- Species Eupatorium barbacense Hieron. accepted as Chromolaena barbacensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium barclayanum Benth. accepted as Ayapana amygdalina (Lam.) R.M.King & H.Rob.
- Species Eupatorium barranquillense Hieron. accepted as Chromolaena barranquillensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium bartlettii B.L.Rob. accepted as Critonia bartlettii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium bartlingianum steudel accepted as Ageratina glechonophylla (Less.) R.M.King & H.Rob.
- Species Eupatorium bartlingianum Steud. accepted as Ageratina glechonophylla (Less.) R.M.King & H.Rob.
- Species Eupatorium bartsiaefolium DC. accepted as Chromolaena hirsuta (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium bartsiifolium DC.
- Species Eupatorium bartsioides Sch.Bip. ex Baker accepted as Chromolaena hirsuta (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium basifolium Malme accepted as Praxelis basifolia (Malme) R.M.King & H.Rob.
- Species Eupatorium bathyphlebium B.L.Rob. accepted as Chromolaena bathyphlebia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium bellataefolium Kunth
- Species Eupatorium bellidifolium Benth. accepted as Ageratina bellidifolia (Benth.) R.M.King & H.Rob.
- Species Eupatorium beneolens B.L.Rob. accepted as Hebeclinium beneolens (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium benguetense C.B.Rob.
- Species Eupatorium benjamin-lincolnii Steyerm. accepted as Symphyopappus reticulatus Baker
- Species Eupatorium benthamii Klatt accepted as Bartlettina macrocephala (Benth.) R.M.King & H.Rob.
- Species Eupatorium bergantinense V.M.Badillo accepted as Fleischmannia bergantinensis (V.M.Badillo) R.M.King & H.Rob.
- Species Eupatorium berlandieri DC. accepted as Ageratina havanensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium berlandieri A.Gray accepted as Ageratina occidentalis (Hook.) R.M.King & H.Rob.
- Species Eupatorium berteroanum (Spreng.) Colla accepted as Fleischmannia microstemon (Cass.) R.M.King & H.Rob.
- Species Eupatorium bertholdii Sch.Bip. accepted as Chromolaena bertholdii (Sch.Bip.) R.M.King & H.Rob.
- Species Eupatorium betonicaeforme (DC.) Baker accepted as Barrosoa betonicaeformis (DC.) R.M.King & H.Rob.
- Species Eupatorium betonicifolium Mill. accepted as Conoclinium betonicifolium (Mill.) R.M.King & H.Rob.
- Species Eupatorium betoniciforme (DC.) Baker accepted as Barrosoa betoniciformis (DC.) R.M.King & H.Rob.
- Species Eupatorium betonicum (DC.) Hemsl. accepted as Conoclinium betonicifolium var. betonicifolium (Mill.) R.M.King & H.Rob.
- Species Eupatorium betonicum Hemsley accepted as Conoclinium betonicifolium (Mill.) R.M.King & H.Rob.
- Species Eupatorium betulaefolium (Greene) B.L.Rob. accepted as Ageratina betulaefolia (Greene) R.M.King & H.Rob.
- Species Eupatorium betulifolium (Greene) B.L.Rob. accepted as Ageratina herbacea (A.Gray) R.M.King & H.Rob.
- Species Eupatorium biceps Klotzsch ex Vatke accepted as Ageratina ligustrina (DC.) R.M.King & H.Rob.
- Species Eupatorium bicolor Lam. ex DC. accepted as Gynoxys buxifolia (Kunth) Cass.
- Species Eupatorium bicolorum Lam.
- Species Eupatorium bigelovii A.Gray accepted as Chromolaena bigelovii (A.Gray) R.M.King & H.Rob.
- Species Eupatorium bigelowii Hemsl.
- Species Eupatorium billbergianum Beurl. accepted as Critonia billbergiana (Beurl.) R.M.King & H.Rob.
- Species Eupatorium billbergianum Beurlin accepted as Critonia billbergiana (Beurl.) R.M.King & H.Rob.
- Species Eupatorium bimatrum Standl. & L.O.Williams accepted as Fleischmannia microstemon (Cass.) R.M.King & H.Rob.
- Species Eupatorium bimatrum Stendley & L.O.Williams accepted as Fleischmannia microstemon (Cass.) R.M.King & H.Rob.
- Species Eupatorium birmanicum DC. accepted as Eupatorium cannabinum L.
- Species Eupatorium bishopii (R.M.King & H.Rob.) B.L.Turner accepted as Cronquistianthus bishopii R.M.King & H.Rob.
- Species Eupatorium blakei B.L.Rob. accepted as Fleischmannia blakei (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium blanchetii Sch.Bip. accepted as Lasiolaena blanchetii (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium blanchetii Sch.Bip. ex Baker accepted as Lasiolaena blanchetii (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium blepharilepis Sch.Bip. accepted as Ageratina blepharilepis (Sch.Bip.) R.M.King & H.Rob.
- Species Eupatorium blumenavii Hieron. accepted as Macropodina blumenavii (Hieron.) R.M.King & H.Rob.
- Species Eupatorium bogotense DC. accepted as Ageratina baccharoides (Kunth) R.M.King & H.Rob.
- Species Eupatorium bohlmannianum (R.M.King & H.Rob.) B.L.Turner accepted as Fleischmannia bohlmanniana R.M.King & H.Rob.
- Species Eupatorium bohlmannianum (R.M.King & H.Rob.) C.Nelson accepted as Fleischmannia bohlmanniana R.M.King & H.Rob.
- Species Eupatorium bonplandianum Sch.Bip.
- Species Eupatorium bonplandianum Sch.Bip. ex Hieron. accepted as Koanophyllon solidaginoides (Kunth) R.M.King & H.Rob.
- Species Eupatorium boreale Greene accepted as Ageratina altissima (L.) R.M.King & H.Rob.
- Species Eupatorium borinquense (Britton) B.L.Rob. accepted as Chromolaena borinquensis (Britton) R.M.King & H.Rob.
- Species Eupatorium borregoianum M.Gómez accepted as Mikania ranunculifolia A.Rich.
- Species Eupatorium boyacense B.L.Rob.
- Species Eupatorium brachiatum Sw. ex Wikstr. accepted as Chromolaena odorata (L.) R.M.King & H.Rob.
- Species Eupatorium brachychaetum B.L.Rob. accepted as Antillia brachychaeta (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium bracteatum Gardner
- Species Eupatorium bracteatum Hook. & Arn.
- Species Eupatorium bracteatum Gardner accepted as Stomatanthes pernambucensis (B.L.Rob.) H.Rob.
- Species Eupatorium bracteatum Hook. & Arn. accepted as Chromolaena congesta (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium brandegeeanum B.L.Rob. accepted as Ageratina brandegeeana (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium brasiliense Spreng. accepted as Pseudobrickellia brasiliensis (Spreng.) R.M.King & H.Rob.
- Species Eupatorium braunii Pol. accepted as Baccharis pedunculata (Mill.) Cabrera
- Species Eupatorium breedlovei (R.M.King & H.Rob.) B.L.Turner accepted as Bartlettina breedlovei R.M.King & H.Rob.
- Species Eupatorium brenesii Standl. accepted as Neomirandea standleyi (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium breviflorum Alain accepted as Koanophyllon breviflorum (Alain) R.M.King & H.Rob.
- Species Eupatorium brevipes DC. accepted as Ageratina brevipes (DC.) R.M.King & H.Rob.
- Species Eupatorium brevipetiolatum Sch.Bip. ex Baker
- Species Eupatorium brevipetiolatum Baker ex Hieron. accepted as Eupatorium hieronymi S.E.Freire
- Species Eupatorium brevipetiolatum Sch.Bip. ex Klatt accepted as Bartlettina brevipetiolata (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium brevisetum DC. accepted as Piptothrix areolaris (DC.) R.M.King & H.Rob.
- Species Eupatorium brickellia DC. accepted as Brickellia cordifolia Elliott
- Species Eupatorium brickellioides Klatt accepted as Heterocondylus alatus (Vell.) R.M.King & H.Rob.
- Species Eupatorium brideleifolium Benth.
- Species Eupatorium bridgesii B.L.Rob. accepted as Fleischmannia bridgesii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium brittonianum Nieuwl. & Lunell
- Species Eupatorium bruneri A.Gray accepted as Eupatorium maculatum L.
- Species Eupatorium brunneolum Baker accepted as Chromolaena brunneola (Baker) R.M.King & H.Rob.
- Species Eupatorium bucheri B.L.Rob. accepted as Spaniopappus ruckeri (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium buchii Urb.
- Species Eupatorium buddleaefolium Benth. accepted as Aristeguietia buddleaefolia (Benth.) R.M.King & H.Rob.
- Species Eupatorium buddleifolium Benth. accepted as Aristeguietia buddleifolia (Benth.) R.M.King & H.Rob.
- Species Eupatorium bulbosum Aristeg. accepted as Guayania bulbosa (Aristeg.) R.M.King & H.Rob.
- Species Eupatorium bullatissimum B.L.Rob. accepted as Hebeclinium bullatissimum (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium bullatum Klatt accepted as Chromolaena bullata (Klatt) R.M.King & H.Rob.
- Species Eupatorium bullescens B.L.Rob. accepted as Koanophyllon bullescens (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium bulliferum S.F.Blake accepted as Cronquistianthus bulliferus (S.F.Blake) R.M.King & H.Rob.
- Species Eupatorium bullulatum Urb. & Ekman
- Species Eupatorium buniifolium Hook. ex Hook. & Arn. accepted as Acanthostyles buniifolius (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium bupleurifolium DC. accepted as Campovassouria cruciata (Vell.) R.M.King & H.Rob.
- Species Eupatorium burchellii Raker accepted as Campuloclinium burchellii (Baker) R.M.King & H.Rob.
- Species Eupatorium burchellii Baker accepted as Campuloclinium burchellii (Baker) R.M.King & H.Rob.
- Species Eupatorium burgeri (R.M.King & H.Rob.) L.O.Williams accepted as Neomirandea burgeri R.M.King & H.Rob.
- Species Eupatorium bustamenta DC.
- Species Eupatorium bustamentum DC. accepted as Ageratina pichinchensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium caaguazuense Hieron. accepted as Chromolaena caaguazuensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium cabaionum Urb. & Ekman accepted as Koanophyllon cabaionum (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium cabrerae B.L.Rob. accepted as Barrosoa cabrerae (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium cacalioides Kunth accepted as Aristeguietia cacalioides (Kunth) R.M.King & H.Rob.
- Species Eupatorium caducisetum DC. accepted as Ageratina gracilis (Kunth) R.M.King & H.Rob.
- Species Eupatorium caeciliae B.L.Rob. accepted as Ageratina caeciliae (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium caespitosum Migo accepted as Eupatorium fortunei Turcz.
- Species Eupatorium calaminthifolium Kunth
- Species Eupatorium calaminthifolium Kunth accepted as Ageratina calaminthaefolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium calamocephalum (Baker) Hieron. accepted as Chromolaena leucocephala Gardner
- Species Eupatorium calcicola Urb.
- Species Eupatorium calcicolum Urb. accepted as Koanophyllon calcicola (Urb.) R.M.King & H.Rob.
- Species Eupatorium caldense B.L.Rob. accepted as Chromolaena caldensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium calderillense Hieron. accepted as Ageratina calderillensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium calderonii B.L.Turner accepted as Bartlettina calderonii (B.L.Turner) B.L.Turner
- Species Eupatorium callacatense Hieron. accepted as Cronquistianthus callacatensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium callilepis Sch.Bip. ex Baker accepted as Chromolaena callilepis (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium calocephalum (Nutt.) Nutt. accepted as Chromolaena ivaefolia (L.) R.M.King & H.Rob.
- Species Eupatorium calophyllum (Greene) B.L.Rob. accepted as Ageratina calophylla (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium calycinum Sch.Bip. ex Baker accepted as Disynaphia calyculata (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium calyculatum Hook. & Arn. accepted as Disynaphia calyculata (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium camachense Hieron. accepted as Ageratina camachensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium camataguiensis Hieron.
- Species Eupatorium camataquiense Hieron. accepted as Kaunia camataguiensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium camiguinense Merr.
- Species Eupatorium campechense B.L.Rob. accepted as Critonia campechensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium campestre DC. accepted as Chromolaena campestris (DC.) R.M.King & H.Rob.
- Species Eupatorium campylocladum B.L.Rob. accepted as Ageratina campyloclada (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium candicans Wall.
- Species Eupatorium candolleanum Hook. & Arn. accepted as Barrosoa candolleana (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium canescens Ortega accepted as Brickellia eupatorioides var. eupatorioides (L.)
- Species Eupatorium canescens Vahl accepted as Chromolaena sinuata (Lam.) R.M.King & H.Rob.
- Species Eupatorium cannabifolium Salisb. accepted as Eupatorium cannabinum L.
- Species Eupatorium cannabinum L.
- Species Eupatorium cannabis-folium Gilib. accepted as Eupatorium cannabinum L.
- Species Eupatorium capense A.Spreng.
- Species Eupatorium capense accepted as Vernonia mespilifolia Less.
- Species Eupatorium capense Spreng. accepted as Vernonia mespilifolia Less.
- Species Eupatorium capillare Desv. ex Ham.
- Species Eupatorium capillare Desv. accepted as Brickellia diffusa (Vahl) A.Gray
- Species Eupatorium capillare (DC.) Baker accepted as Praxelis capillaris (DC.) Sch.Bip.
- Species Eupatorium capillifolium (Lam.) Small ex Porter & Britton
- Species Eupatorium capillifolium Small
- Species Eupatorium capillipes Benth. ex Oerst. accepted as Fleischmannia capillipes (Benth. ex Oerst.) R.M.King & H.Rob.
- Species Eupatorium capillipes Benth. ex Oersted accepted as Fleischmannia capillipes (Benth. ex Oerst.) R.M.King & H.Rob.
- Species Eupatorium capillipes Benth. accepted as Fleischmannia capillipes (Benth. ex Oerst.) R.M.King & H.Rob.
- Species Eupatorium capitatum Rusby accepted as Trichogonia capitata (Rusby) B.L.Rob.
- Species Eupatorium capnoresbium B.L.Rob. accepted as Ageratina lucida (Ortega) R.M.King & H.Rob.
- Species Eupatorium caracasanum Sch.Bip.
- Species Eupatorium caracasanum Sch.Bip. ex Hieron. accepted as Chromolaena oxylepis (DC.) R.M.King & H.Rob.
- Species Eupatorium cardiophyllum B.L.Rob. accepted as Ageratina cardiophylla (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium carletonii B.L.Rob. accepted as Fleischmannia carletonii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium carmonis Standl. & Steyerm. accepted as Ageratina carmonis (Standl. & Steyerm.) R.M.King & H.Rob.
- Species Eupatorium carnosifolium B.L.Rob. accepted as Diacranthera crenata (Schltdl. ex Mart.) R.M.King & H.Rob.
- Species Eupatorium carnosum Kuntze accepted as Neomirandea carnosa (Kuntze) R.M.King & H.Rob.
- Species Eupatorium carolinianum Steven
- Species Eupatorium carsticola Borhidi & O.Muñiz accepted as Grisebachianthus carsticola (Borhidi & O.Muñiz) R.M.King & H.Rob.
- Species Eupatorium casarettoi (B.L.Rob.) Steyerm. accepted as Symphyopappus casarettoi B.L.Rob.
- Species Eupatorium cassinaefolium Bertol. accepted as Eupatorium cuneifolium Willd.
- Species Eupatorium catarium Veldkamp accepted as Praxelis clematidea (Griseb.) R.M.King & H.Rob.
- Species Eupatorium catense Elmer accepted as Eupatorium camiguinense Merr.
- Species Eupatorium catharinense Cabrera accepted as Neocabreria catharinensis (Cabrera) R.M.King & H.Rob.
- Species Eupatorium caucasicum Steven accepted as Eupatorium cannabinum L.
- Species Eupatorium ceanothifolium Spreng. accepted as Ageratina tristis (DC.) R.M.King & H.Rob.
- Species Eupatorium ceanothifolium Muhl. ex Willd. accepted as Ageratina aromatica (L.) Spach
- Species Eupatorium celebicum Blume accepted as Vernonia arborea Buch.-Ham.
- Species Eupatorium celendensis (R.M.King & H.Rob.) B.L.Turner accepted as Cronquistianthus celendensis R.M.King & H.Rob.
- Species Eupatorium celendinense (R.M.King & H.Rob.) B.L.Turner accepted as Cronquistianthus celendinensis R.M.King & H.Rob.
- Species Eupatorium celestini Cuatrec.
- Species Eupatorium celosioides Willd. ex Steetz accepted as Condylidium iresinoides (Kunth) R.M.King & H.Rob.
- Species Eupatorium celtidifolium Rich.
- Species Eupatorium celtidifolium Lam. accepted as Koanophyllon celtidifolia (Lam.) R.M.King & H.Rob.
- Species Eupatorium cerasifolium Sch.Bip. ex Baker accepted as Guayania cerasifolia (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium ceratophyllum Hook. & Arn. accepted as Gyptis tanacetifolia (Gillies ex Hook. & Arn.) D.J.N.Hind & Flann
- Species Eupatorium ceriferum McVaugh accepted as Ageratina cerifera (McVaugh) R.M.King & H.Rob.
- Species Eupatorium chabrense Urb. & Ekman accepted as Koanophyllon chabrense (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium chachapoyasense Cuatrec. accepted as Ageratina chachapoyasensis (Cuatrec.) R.M.King & H.Rob.
- Species Eupatorium chachapoyense (R.M.King & H.Rob.) B.L.Turner accepted as Cronquistianthus chachapoyensis R.M.King & H.Rob.
- Species Eupatorium chalceorithales B.L.Rob. accepted as Koanophyllon chalceorithales (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium chamaedrifolium Kunth accepted as Cronquistianthus chamaedrifolius (Kunth) R.M.King & H.Rob.
- Species Eupatorium chapalense S.Watson accepted as Ageratina lasioneura (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium chaparense B.L.Rob. accepted as Austroeupatorium chaparense (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium chapmanii Small accepted as Eupatorium perfoliatum L.
- Species Eupatorium charpinii Cabrera
- Species Eupatorium chaseae B.L.Rob. accepted as Chromolaena chaseae (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium chenopodifolium (Willd.) Poir. accepted as Mikania chenopodifolia Willd.
- Species Eupatorium chiapense B.L.Rob. accepted as Ageratina vernalis (Vatke & Kurtz) R.M.King & H.Rob.
- Species Eupatorium chilca Kunth accepted as Ophryosporus chilca (Kunth) Hieron.
- Species Eupatorium chilense Bertero accepted as Ageratina glechonophylla (Less.) R.M.King & H.Rob.
- Species Eupatorium chilense Molina accepted as Flaveria trinervia (Spreng.) C.Mohr
- Species Eupatorium chimborazense Hieron. ex Sodiro accepted as Aristeguietia chimborazensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium chimborazensis Hieron. accepted as Aristeguietia chimborazensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium chinense L.
- Species Eupatorium chiquitense B.L.Rob. accepted as Praxelis chiquitensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium chiriquense B.L.Rob. accepted as Ageratina chiriquensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium chlorocephalum Dusén
- Species Eupatorium chlorolepis Baker accepted as Campuloclinium chlorolepis (Baker) R.M.King & H.Rob.
- Species Eupatorium chlorophyllum Klatt accepted as Ageratina badia (Klatt) R.M.King & H.Rob.
- Species Eupatorium chlorophyllum Klatt ex T.Durand & Pitt. accepted as Ageratina badia (Klatt) R.M.King & H.Rob.
- Species Eupatorium chodati Hassl. accepted as Trichogonia chodatii (Hassl.) R.M.King & H.Rob.
- Species Eupatorium chodatii Hassl. accepted as Trichogonia chodatii (Hassl.) R.M.King & H.Rob.
- Species Eupatorium choricephaloides B.L.Rob. accepted as Ageratina choricephaloides (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium choricephalum B.L.Rob. accepted as Ageratina choricephala (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium chotense Hieron. accepted as Cronquistianthus chotensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium christieanum Baker accepted as Chromolaena christieana (Baker) R.M.King & H.Rob.
- Species Eupatorium chrysocephalum Klatt accepted as Neurolaena lobata (L.) R.Br. ex Cass.
- Species Eupatorium chrysostictum B.L.Rob. accepted as Chromolaena chrysosticta (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium chrysostyloides B.L.Rob. accepted as Flyriella leonensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium chrysostylum B.L.Rob. accepted as Flyriella chrysostyla (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium cicatricosum Sch.Bip. ex Baker accepted as Pseudobrickellia angustissima (Spreng. ex Baker) R.M.King & H.Rob.
- Species Eupatorium ciliatum Hook. & Arn. accepted as Chromolaena hookeriana (Griseb.) R.M.King & H.Rob.
- Species Eupatorium ciliatum Less. accepted as Ageratina ciliata (Less.) R.M.King & H.Rob.
- Species Eupatorium cilioliferum Standl. & L.O.Williams ex Ant.Molina
- Species Eupatorium cinerascens Wall. accepted as Aster albescens (DC.) Wall. ex Hand.-Mazz.
- Species Eupatorium cinereoviride Sch.Bip. ex Baker accepted as Chromolaena cinereoviridis (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium cinereum Raf.
- Species Eupatorium cinereum Wall. ex Steud.
- Species Eupatorium cinereum Wall. ex Wall. ex Steudel
- Species Eupatorium cinereum Griseb. accepted as Austroeupatorium inulaefolium (Kunth) R.M.King & H.Rob.
- Species Eupatorium cinereum L.f. accepted as Pteronia incana (Burm.) DC.
- Species Eupatorium cinereum Wall. ex steudel accepted as Aster albescens (DC.) Wall. ex Hand.-Mazz.
- Species Eupatorium cinereum Baker accepted as Austrobrickellia bakerianum (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium claussenii Gardner accepted as Chromolaena stachyophylla (Spreng.) R.M.King & H.Rob.
- Species Eupatorium clavatum Griseb. accepted as Ophryosporus piquerioides (DC.) Benth. ex Baker
- Species Eupatorium clavisetum (V.M.Badillo) V.M.Badillo accepted as Idiothamnus clavisetus (V.M.Badillo) R.M.King & H.Rob.
- Species Eupatorium clavulatum Griseb. accepted as Ophryosporus piquerioides (DC.) Benth. ex Baker
- Species Eupatorium clematideum Less. ex Baker accepted as Mikania phaeoclados Mart. ex Baker
- Species Eupatorium clematideum Griseb. accepted as Praxelis clematidea (Griseb.) R.M.King & H.Rob.
- Species Eupatorium clematideum (Wall. ex DC.) Sch.Bip. accepted as Eupatorium squamosum D.Don
- Species Eupatorium clematitis DC. accepted as Chromolaena odorata (L.) R.M.King & H.Rob.
- Species Eupatorium clementis Alain accepted as Koanophyllon clementis (Alain) R.M.King & H.Rob.
- Species Eupatorium clibadioides Baker
- Species Eupatorium coahuilense A.Gray accepted as Phanerostylis coahuilensis (A.Gray) R.M.King & H.Rob.
- Species Eupatorium cochabambense Hieron. accepted as Chromolaena connivens (Rusby) R.M.King & H.Rob.
- Species Eupatorium coelestinum Michx.
- Species Eupatorium coelestinum L. accepted as Conoclinium coelestinum (L.) DC.
- Species Eupatorium coelocaule B.L.Rob. accepted as Grosvenoria coelocaulis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium coeruleum Sessé & Moc. accepted as Ageratum corymbosum Zucc. ex Pers.
- Species Eupatorium cognatum Kunth & Bouché accepted as Ageratina mairetiana (DC.) R.M.King & H.Rob.
- Species Eupatorium collinum DC. accepted as Chromolaena collina (DC.) R.M.King & H.Rob.
- Species Eupatorium collodes B.L.Rob.
- Species Eupatorium collodes B.L.Rob. & Greenm. accepted as Ageratina collodes (B.L.Rob. & Greenm.) R.M.King & H.Rob.
- Species Eupatorium coloratum Larrañaga
- Species Eupatorium coloratum Larran.
- Species Eupatorium coloratum Willd. accepted as Gymnanthemum coloratum (Willd.) H.Rob. & B.Kahn
- Species Eupatorium coloratum Spreng. ex DC. accepted as Aster albescens (DC.) Wall. ex Hand.-Mazz.
- Species Eupatorium columbianum Heering accepted as Chromolaena columbiana (Heering) R.M.King & H.Rob.
- Species Eupatorium commersonii (Cass.) Hieron. accepted as Gyptis commersonii Cass.
- Species Eupatorium compactum Benth. accepted as Aristeguietia persicifolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium compositifolium Walter
- Species Eupatorium compressum Gardner accepted as Symphyopappus compressus (Gardner) B.L.Rob.
- Species Eupatorium comptoniaefolium DC. accepted as Grazielia serrata (Spreng.) R.M.King & H.Rob.
- Species Eupatorium comptoniifolium DC. accepted as Grazielia serrata (Spreng.) R.M.King & H.Rob.
- Species Eupatorium concinnitas Herter accepted as Eupatorium concinnum DC.
- Species Eupatorium concinnum DC.
- Species Eupatorium concinnum Hook. & Arn. accepted as Chromolaena ivaefolia (L.) R.M.King & H.Rob.
- Species Eupatorium condensatum Rchb. ex Less. accepted as Pollalesta condensata (Less.) Aristeg.
- Species Eupatorium confertifolium Klatt accepted as Ageratina vacciniaefolia (Benth.) R.M.King & H.Rob.
- Species Eupatorium confertum (Gardner) (Gardner)
- Species Eupatorium confertum Gardner accepted as Grazielia serrata (Spreng.) R.M.King & H.Rob.
- Species Eupatorium confluens B.L.Rob.
- Species Eupatorium confluentis B.L.Rob. accepted as Barrosoa confluentis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium congestum Hook. & Arn. accepted as Chromolaena squarrulosa (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium congestum Hook. & Am. accepted as Chromolaena congesta (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium conglobatum DC. accepted as Koanophyllon conglobatum (DC.) R.M.King & H.Rob.
- Species Eupatorium connatum Michaux accepted as Eupatorium perfoliatum L.
- Species Eupatorium connatum Michx. accepted as Eupatorium perfoliatum L.
- Species Eupatorium connivens Rusby accepted as Chromolaena connivens (Rusby) R.M.King & H.Rob.
- Species Eupatorium conoclinanthium Hieron. accepted as Praxelis conoclinanthia (Hieron.) R.M.King & H.Rob.
- Species Eupatorium conoclinioides Gardner accepted as Trichogonia salviifolia Gardner
- Species Eupatorium conoclinium Mill. ex B.L.Turner accepted as Conoclinium betonicifolium (Mill.) R.M.King & H.Rob.
- Species Eupatorium consanguineum DC. accepted as Koanophyllon consanguineum (DC.) R.M.King & H.Rob.
- Species Eupatorium conspicuum Mart. ex Colla accepted as Bartlettina conspicua (Mart. ex Colla) P.L.R.Moraes & Guglielmone
- Species Eupatorium conspicuum Kunth & C.D.Bouché accepted as Ageratina grandifolia (Regel) R.M.King & H.Rob.
- Species Eupatorium constanzae Urb. accepted as Koanophyllon constanzae (Urb.) H.Rob.
- Species Eupatorium constipatiflorum Klatt accepted as Bartlettina constipatiflora (Klatt) R.M.King & H.Rob.
- Species Eupatorium contortum C.D.Adams
- Species Eupatorium contortum C. Adams accepted as Ageratina contorta (C.D.Adams) R.M.King & H.Rob.
- Species Eupatorium conyzoides Vatke
- Species Eupatorium conyzoides Mill. accepted as Chromolaena odorata (L.) R.M.King & H.Rob.
- Species Eupatorium conyzoides (L.) E.H.L.Krause accepted as Ageratum conyzoides L.
- Species Eupatorium conyzoides Vahl accepted as Chromolaena odorata (L.) R.M.King & H.Rob.
- Species Eupatorium conzatii Greenm.
- Species Eupatorium conzattii Gand. accepted as Piptothrix areolaris (DC.) R.M.King & H.Rob.
- Species Eupatorium conzattii Greenm. accepted as Critonia conzattii (Greenm.) R.M.King & H.Rob.
- Species Eupatorium cookii B.L.Rob. accepted as Fleischmannia cookii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium coperense Hieron. accepted as Ageratina asclepiadea (L.f.) R.M.King & H.Rob.
- Species Eupatorium cordatum Mutis
- Species Eupatorium cordatum Burm.f. accepted as Mikania cordata (Burm.f.) B.L.Rob.
- Species Eupatorium cordatum Walter accepted as Ageratina aromatica (L.) Spach
- Species Eupatorium cordifolium Sw.
- Species Eupatorium cordiforme Poir. accepted as Ageratina aromatica (L.) Spach
- Species Eupatorium cordiforme Poiret accepted as Ageratina aromatica (L.) Spach
- Species Eupatorium cordigerum (Fernald) Fernald
- Species Eupatorium coriaceum Vahl accepted as Gymnanthemum fimbrilliferum (DC.) Cass.
- Species Eupatorium coriaceum Spreng. accepted as Koanophyllon villosum (Sw.) R.M.King & H.Rob.
- Species Eupatorium coriaceum Scheele accepted as Symphyopappus reticulatus Baker
- Species Eupatorium cornifolium Willd. ex Less. accepted as Pollalesta acuminata (Kunth) Aristeg.
- Species Eupatorium coronopifolium (Michx.) Willd. accepted as Eupatorium compositifolium Walter
- Species Eupatorium correlliorum Plettman accepted as Koanophyllon correlliorum (Plettman) R.M.King & H.Rob.
- Species Eupatorium corsicum Req. ex Loisel. accepted as Eupatorium cannabinum L.
- Species Eupatorium corumbense B.L.Rob. accepted as Stomatanthes corumbensis (B.L.Rob.) H.Rob.
- Species Eupatorium corvi McVaugh accepted as Matudina corvi (McVaugh) R.M.King & H.Rob.
- Species Eupatorium corylifolium Griseb. accepted as Ageratina corylifolia (Griseb.) R.M.King & H.Rob.
- Species Eupatorium corymbosum Aubl. accepted as Chromolaena corymbosa (Aubl.) R.M.King & H.Rob.
- Species Eupatorium costaricense Kuntze accepted as Gongrostylus costaricensis (Kuntze) R.M.King & H.Rob.
- Species Eupatorium costatipes B.L.Rob. accepted as Chromolaena costatipes (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium cotacachense Hieron. accepted as Ageratina pseudochilca (Benth.) R.M.King & H.Rob.
- Species Eupatorium cotinifolium Willd. accepted as Baccharis cotinifolium (Willd.) Urb.
- Species Eupatorium coulteri B.L.Rob. accepted as Koanophyllon coulteri (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium cowleyanum M.Gómez
- Species Eupatorium cowleyanum M.Gómez & Molinet accepted as Mikania cordifolia (L.f.) Willd.
- Species Eupatorium crassicaule Steyerm. accepted as Guayania crassicaulis (Steyerm.) R.M.King & H.Rob.
- Species Eupatorium crassiceps B.L.Rob. accepted as Ageratina crassiceps (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium crassifolium Raf. accepted as Eupatorium hyssopifolium L.
- Species Eupatorium crassifolium Shuttlew. ex A.Gray accepted as Eupatorium mikanioides Chapm.
- Species Eupatorium crassipes Hieron. accepted as Gyptis crassipes (Hieron.) R.M.King & H.Rob.
- Species Eupatorium crassirameum B.L.Rob. accepted as Pachythamnus crassirameus (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium cremastum B.L.Rob. accepted as Ageratina cremasta (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium crenaeum B.L.Rob. accepted as Ageratina crenaea (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium crenatifolium Hand.-Mazz. accepted as Eupatorium chinense L.
- Species Eupatorium crenatum DC. accepted as Mikania stipulacea (Vahl) Willd.
- Species Eupatorium crenatum Gardner accepted as Chromolaena squalida (DC.) R.M.King & H.Rob.
- Species Eupatorium crenatum Gomes accepted as Mikania cordifolia (L.f.) Willd.
- Species Eupatorium crenifolium Hand.-Mazz.
- Species Eupatorium crenulatum Gomes
- Species Eupatorium crenulatum (Spreng.) Spreng.
- Species Eupatorium crenulatum Gardner accepted as Trichogonia hirtiflora (DC.) Sch.Bip. ex Baker
- Species Eupatorium crenulatum (Spreng.) Spreng. ex Hieron. accepted as Raulinoreitzia crenulata (Spreng.) R.M.King & H.Rob.
- Species Eupatorium crispiflorum (C.Wright ex C.Wright) Molinet & M.Gómez accepted as Mikania crispiflora wr. ex C.Wright
- Species Eupatorium cristalense Urb. accepted as Koanophyllon rhexioides (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium crithmifolium Less. ex Baker accepted as Mikania anethifolia (DC.) Matzenb.
- Species Eupatorium crithmifolium Griseb. accepted as Acanthostyles buniifolius (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium critoniforme Urb. accepted as Urbananthus critoniformis (Urb.) R.M.King & H.Rob.
- Species Eupatorium critonioides Steetz accepted as Critonia morifolia (Mill.) R.M.King & H.Rob.
- Species Eupatorium critonioides Steets accepted as Critonia morifolia (Mill.) R.M.King & H.Rob.
- Species Eupatorium crocodilium Standl. & Steyerm. accepted as Fleischmannia crocodilia (Standl. & Steyerm.) R.M.King & H.Rob.
- Species Eupatorium cronquistii (R.M.King & H.Rob.) B.L.Turner accepted as Bartlettina cronquistii R.M.King & H.Rob.
- Species Eupatorium cruciatum (Vell.) Ariza accepted as Campovassouria cruciata (Vell.) R.M.King & H.Rob.
- Species Eupatorium cryptanthum Sch.Bip. ex Baker accepted as Chromolaena cryptantha (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium cuadrasense V.M.Badillo accepted as Ayapana tovarensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium cuatrecasasii R.M.King & H.Rob. accepted as Hebeclinium killipii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium cubense Pers. accepted as Koanophyllon villosum (Sw.) R.M.King & H.Rob.
- Species Eupatorium cubense DC. accepted as Koanophyllon villosum (Sw.) R.M.King & H.Rob.
- Species Eupatorium cuchabense B.L.Rob. accepted as Ayapanopsis cuchabensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium cuencanum B.L.Rob. accepted as Ageratina cuencana (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium cujabense S.Moore accepted as Ayapana amygdalina (Lam.) R.M.King & H.Rob.
- Species Eupatorium cuneatum Engelm.
- Species Eupatorium cuneatum (Engelm. ex A.Gray) Engelm. ex Small
- Species Eupatorium cuneatum DC. accepted as Symphyopappus cuneatus (DC.) Sch.Bip. ex Baker
- Species Eupatorium cuneatum Engelm. ex Torr. & A.Gray accepted as Eupatorium perfoliatum L.
- Species Eupatorium cuneifolium Willd.
- Species Eupatorium cuneifolium DC.
- Species Eupatorium cupressorum Standl. & Steyerm. accepted as Piptothrix areolaris (DC.) R.M.King & H.Rob.
- Species Eupatorium cursonii B.L.Rob. accepted as Aristeguietia cursonii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium cuspidatum Spreng. ex DC.
- Species Eupatorium cuspidatum Sessé & Moc. accepted as Barroetea pavonii A.Gray
- Species Eupatorium cuspidatum Pav. ex A.Gray accepted as Barroetea pavonii A.Gray
- Species Eupatorium cuspidatum Willd. ex Less. accepted as Pollalesta discolor (Kunth) Aristeg.
- Species Eupatorium cutervense Hieron. accepted as Ageratina cutervensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium cuzcoense Hieron. accepted as Ageratina cuzcoensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium cydoniaefolium Willd. ex Less. accepted as Pollalesta vernonioides Kunth
- Species Eupatorium cydoniifolium Willd. ex Less.
- Species Eupatorium cylindricum McVaugh accepted as Ageratina cylindrica (McVaugh) R.M.King & H.Rob.
- Species Eupatorium cylindrocephalum Sch.Bip.
- Species Eupatorium cylindrocephalum Sch.Bip. ex Baker accepted as Chromolaena cylindrocephala (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium cymuliferum (B.L.Rob.) B.L.Turner accepted as Kyrsteniopsis cymulifera (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium cynanchifolium DC. accepted as Koanophyllon villosum (Sw.) R.M.King & H.Rob.
- Species Eupatorium cyrili-nelsonii Ant.Molina
- Species Eupatorium dalea L. accepted as Critonia dalea (L.) DC.
- Species Eupatorium dalea Kunth accepted as Critonia pseudodalea DC.
- Species Eupatorium daleoides (DC.) Hemsl. accepted as Critonia daleoides DC.
- Species Eupatorium dasycarpum A.Gray accepted as Steviopsis rapunculoides (DC.) R.M.King & H.Rob.
- Species Eupatorium dasycarpum A.Gray ex S.Watson accepted as Steviopsis rapunculoides (DC.) R.M.King & H.Rob.
- Species Eupatorium dasycladium Dusén
- Species Eupatorium dasyneurum B.L.Rob. accepted as Ageratina dasyneura (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium debeauxii B.L.Rob. accepted as Dasycondylus debeauxii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium decemflorum DC. accepted as Austroeupatorium decemflorum (DC.) R.M.King & H.Rob.
- Species Eupatorium decipiens Hook. & Arn. accepted as Ophryosporus triangularis Meyen
- Species Eupatorium decipiens Baker accepted as Heterocondylus decipiens (Baker) R.M.King & H.Rob.
- Species Eupatorium decumbens (Gardner) Baker accepted as Chromolaena decumbens Gardner
- Species Eupatorium decurrens Sessé & Moc. accepted as Pluchea salicifolia (Mill.) S.F.Blake
- Species Eupatorium decussatum Sieber ex Sieber ex Steudel
- Species Eupatorium decussatum Sieber ex Steud.
- Species Eupatorium decussatum Klatt accepted as Koanophyllon solidaginoides (Kunth) R.M.King & H.Rob.
- Species Eupatorium decussatum Klatt ex T.Durand & Pittier accepted as Koanophyllon solidaginoides (Kunth) R.M.King & H.Rob.
- Species Eupatorium dejectum B.L.Rob. accepted as Helogyne tacaquirensis Hieron.
- Species Eupatorium delpechianum Urb. & Ekman accepted as Koanophyllon delpechianum (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium deltifolium Raf. ex DC. accepted as Conoclinium coelestinum (L.) DC.
- Species Eupatorium deltoides E.L.Braun accepted as Ageratina luciae-brauniae (Fernald) R.M.King & H.Rob.
- Species Eupatorium deltoides E. Braun accepted as Ageratina luciae-brauniae (Fernald) R.M.King & H.Rob.
- Species Eupatorium deltoideum Steud.
- Species Eupatorium deltoideum steudel accepted as Conoclinium coelestinum (L.) DC.
- Species Eupatorium deltoideum Poepp. ex Spreng. accepted as Koanophyllon villosum (Sw.) R.M.King & H.Rob.
- Species Eupatorium deltoideum Jacq. accepted as Ageratina deltoidea (Jacq.) R.M.King & H.Rob.
- Species Eupatorium dendroides Spreng. accepted as Ageratina dendroides (Spreng.) R.M.King & H.Rob.
- Species Eupatorium densiflorum Morong ex Morong & Britton accepted as Chromolaena densiflora (Morong) R.M.King & H.Rob.
- Species Eupatorium densiflorum Morong accepted as Chromolaena orbignyana (Klatt) R.M.King & H.Rob.
- Species Eupatorium densifolium Mart. ex Baker accepted as Chromolaena multiflosculosa (DC.) R.M.King & H.Rob.
- Species Eupatorium densum Benth. accepted as Asplundianthus densus (Benth.) R.M.King & H.Rob.
- Species Eupatorium dentatum Gardner accepted as Stomatanthes dentatus (Gardner) H.Rob.
- Species Eupatorium denticulatum Vahl accepted as Mikania micrantha Kunth
- Species Eupatorium denudatum Chodat accepted as Campuloclinium macrocephalum (Less.) DC.
- Species Eupatorium desmocephalum B.L.Rob. accepted as Chromolaena desmocephala (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium desmophyllum B.L.Rob. accepted as Cronquistianthus desmophyllus (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium desquamans B.L.Rob. accepted as Ageratina desquamans (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium determinatum (B.L.Rob.) B.L.Turner accepted as Cronquistianthus determinatus (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium diaphanophlebium B.L.Rob. accepted as Chromolaena diaphanophlebia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium dibolii (R.M.King & H.Rob.) B.L.Turner
- Species Eupatorium dibollii (R.M.King & H.Rob.) B.L.Turner accepted as Kyrsteniopsis dibollii R.M.King & H.Rob.
- Species Eupatorium dichotomum Larran.
- Species Eupatorium dichotomum Larrañaga
- Species Eupatorium dichotomum Sch.Bip. ex Mig. accepted as Chromolaena squalida (DC.) R.M.King & H.Rob.
- Species Eupatorium dichotomum Sch.Bip. accepted as Chromolaena odorata (L.) R.M.King & H.Rob.
- Species Eupatorium dichotomum Sch.Bip. ex Miq. accepted as Chromolaena squalida (DC.) R.M.King & H.Rob.
- Species Eupatorium dichroum B.L.Rob. accepted as Lourteigia dichroa (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium dicline Edgew. accepted as Eupatorium cannabinum L.
- Species Eupatorium dictyoneurum Urb. accepted as Ageratina dictyoneura (Urb.) R.M.King & H.Rob.
- Species Eupatorium dictyophyllum DC. accepted as Stomatanthes dictyophyllus (DC.) R.M.King & H.Rob.
- Species Eupatorium didymum Klatt accepted as Ayapanopsis didyma (Klatt) R.M.King & H.Rob.
- Species Eupatorium dielsii B.L.Rob. accepted as Aristeguietia dielsii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium diffusum Vahl accepted as Brickellia diffusa (Vahl) A.Gray
- Species Eupatorium dimorpholepis Baker accepted as Grazielia dimorpholepis (Baker) R.M.King & H.Rob.
- Species Eupatorium dioscoridis Bubani
- Species Eupatorium diplodictyon B.L.Rob. accepted as Aristeguietia diplodictyon (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium discolor DC. accepted as Aristeguietia discolor (DC.) R.M.King & H.Rob.
- Species Eupatorium discolor Spreng. accepted as Vernonia discolor (Spreng.) Less.
- Species Eupatorium dispalatum Gardner accepted as Steyermarkina dispalata (Gardner) R.M.King & H.Rob.
- Species Eupatorium dispar B.L.Rob. accepted as Neocuatrecasia dispar (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium dissectum (Hook. & Arn.) Benth. accepted as Hofmeisteria dissecta (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium dissectum A.Gray accepted as Conoclinium greggii (A.Gray) Small
- Species Eupatorium dissolvens Baker accepted as Fleischmannia dissolvens (Baker) R.M.King & H.Rob.
- Species Eupatorium divaricatum P.J.Bergius accepted as Pteronia divaricata (P. Bergius) Less.
- Species Eupatorium divaricatum Sch.Bip. accepted as Fleischmannia laxa (Gardner) R.M.King & H.Rob.
- Species Eupatorium divergens Less. accepted as Chromolaena odorata (L.) R.M.King & H.Rob.
- Species Eupatorium divergens Roxb. accepted as Vernonia divergens (DC.) Edgew.
- Species Eupatorium diversifolium Schrad. accepted as Fleischmannia diversifolia (Schrad.) H.Rob.
- Species Eupatorium dodoneaefolium Hook. & Arn. accepted as Pluchea dodonaeifolia (Hook. & Arn.) H.Rob. & Cuatrec.
- Species Eupatorium dodoneaefolium DC. accepted as Ayapana amygdalina (Lam.) R.M.King & H.Rob.
- Species Eupatorium dodoneifolium DC. accepted as Pluchea dodonaeifolia (Hook. & Arn.) H.Rob. & Cuatrec.
- Species Eupatorium dodoneifolium Hook. & Arn. accepted as Pluchea dodonaeifolia (Hook. & Arn.) H.Rob. & Cuatrec.
- Species Eupatorium doichangense H.Koyama
- Species Eupatorium dolichobasis McVaugh accepted as Ageratina dolichobasis (McVaugh) R.M.King & H.Rob.
- Species Eupatorium dolicholepis (Urb.) Britton accepted as Koanophyllon dolicholepis (Urb.) R.M.King & H.Rob.
- Species Eupatorium dolichopus Urb.
- Species Eupatorium dolphini Urb. accepted as Koanophyllon dolphinii (Urb.) R.M.King & H.Rob.
- Species Eupatorium dolphinii Urb.
- Species Eupatorium dombeyanum DC. accepted as Ageratina dombeyana (DC.) R.M.King & H.Rob.
- Species Eupatorium domingense Spreng. accepted as Piptocoma rufescens Cass.
- Species Eupatorium donell-smit accepted as Ageratina pichinchensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium donianum Hook. & Arn. accepted as Campuloclinium macrocephalum (Less.) DC.
- Species Eupatorium donnell-smithii J.M.Coult. accepted as Ageratina pichinchensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium drepanioides B.L.Rob. accepted as Badilloa drepanioides (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium drepanophyllum Klatt accepted as Koanophyllon albicaulis (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium droserolepis B.L.Rob. accepted as Koanophyllon droserolepis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium dryadeum DC. accepted as Hebeclinium macrophyllum (L.) DC.
- Species Eupatorium dryophilum B.L.Rob. accepted as Dyscritogyne dryophila (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium dubium Sessé & Moc.
- Species Eupatorium dubium Willd. ex Poiret
- Species Eupatorium dubium Willd. ex Poir. accepted as Eupatorium dubium Willd. ex Poiret
- Species Eupatorium duidense V.M.Badillo accepted as Koanophyllon kavanayense (V.M.Badillo) R.M.King & H.Rob.
- Species Eupatorium dumosum Sch.Bip.
- Species Eupatorium duodecimiflorum Sch.Bip. ex Baker accepted as Austroeupatorium inulaefolium (Kunth) R.M.King & H.Rob.
- Species Eupatorium durandi Klatt accepted as Ageratina anisochroma (Klatt) R.M.King & H.Rob.
- Species Eupatorium durandii Klatt accepted as Ageratina anisochroma (Klatt) R.M.King & H.Rob.
- Species Eupatorium durangense B.L.Rob. accepted as Ageratina durangensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium dusenii Malme accepted as Steyermarkina dusenii (Malme) R.M.King & H.Rob.
- Species Eupatorium dussii Urb. accepted as Chromolaena dussii (Urb.) R.M.King & H.Rob.
- Species Eupatorium dyctiophyllum DC. accepted as Stomatanthes dyctiophyllus (DC.) H.Rob.
- Species Eupatorium ecuadorae Klatt accepted as Heterocondylus vitalbae (DC.) R.M.King & H.Rob.
- Species Eupatorium eggersii Hieron. accepted as Critonia billbergiana (Beurl.) R.M.King & H.Rob.
- Species Eupatorium ehrenbergii Klatt
- Species Eupatorium ehrenbergii Hemsl. accepted as Bartlettina macrocephala (Benth.) R.M.King & H.Rob.
- Species Eupatorium ehrenbergii Hemsley accepted as Bartlettina macrocephala (Benth.) R.M.King & H.Rob.
- Species Eupatorium ejidense V.M.Badillo accepted as Fleischmannia ejidensis (V.M.Badillo) R.M.King & H.Rob.
- Species Eupatorium ekmanii B.L.Rob. accepted as Koanophyllon ekmanii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium elaeagnifolium DC. accepted as Vernonia elliptica DC.
- Species Eupatorium elatum Steetz accepted as Ayapana elata (Steetz) R.M.King & H.Rob.
- Species Eupatorium elatum Salisb. accepted as Eupatorium altissimum L.
- Species Eupatorium elegans (Walter) Vent. ex Steud. accepted as Liatris elegans (Walter) Michx.
- Species Eupatorium elegans Kunth accepted as Ageratina elegans (Kunth) R.M.King & H.Rob.
- Species Eupatorium elegans Gardner accepted as Ayapana amygdalina (Lam.) R.M.King & H.Rob.
- Species Eupatorium elegans (Walter) Vent. ex steudel accepted as Liatris elegans (Walter) Michx.
- Species Eupatorium eleutheranthemun Rusby accepted as Ophryosporus eleutherantherus (Rusby) B.L.Rob.
- Species Eupatorium eleutherantherum Rusby accepted as Ophryosporus eleutherantherus (Rusby) B.L.Rob.
- Species Eupatorium ellipticum DC. accepted as Vernonia scandens DC.
- Species Eupatorium ellipticum Hook. & Arn. accepted as Chromolaena elliptica (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium elongatum Hook. & Arn. accepted as Stomatanthes oblongifolius (Sch.Bip. ex Baker) H.Rob.
- Species Eupatorium elongatum Willd. ex Hieron. accepted as Chromolaena subscandens (Hieron.) R.M.King & H.Rob.
- Species Eupatorium endytum B.L.Rob. accepted as Kaunia endyta (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium engelmannianum Regel
- Species Eupatorium engelmannianum Link ex Torr. & A.Gray accepted as Ageratina aromatica (L.) Spach
- Species Eupatorium enigmaticum B.L.Turner accepted as Fleischmannia guatemalensis R.M.King & H.Rob.
- Species Eupatorium enixum B.L.Rob. accepted as Ageratina enixa (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium ensifolium Griseb. accepted as Campovassouria cruciata (Vell.) R.M.King & H.Rob.
- Species Eupatorium entreriense Hieron. accepted as Austroeupatorium entreriense (Hieron.) R.M.King & H.Rob.
- Species Eupatorium epaleaceum (Gardner) B.L.Rob. accepted as Chromolaena epaleacea Gardner
- Species Eupatorium epilobioides Kunth accepted as Ageratina gracilis (Kunth) R.M.King & H.Rob.
- Species Eupatorium erectum Rojas
- Species Eupatorium ericoides DC. accepted as Disynaphia ericoides (DC.) R.M.King & H.Rob.
- Species Eupatorium erigeroides DC. accepted as Hatschbachiella tweedieana (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium eriocarpum B.L.Rob. & Greenm. accepted as Critonia eriocarpa (B.L.Rob. & Greenm.) R.M.King & H.Rob.
- Species Eupatorium erioclinium B.L.Rob. accepted as Hebeclinium erioclinium (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium eripsimum B.L.Rob. accepted as Chromolaena eripsima (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium erodiifolium DC. accepted as Gyptis tanacetifolia (Gillies ex Hook. & Arn.) D.J.N.Hind & Flann
- Species Eupatorium erythrocomum B.L.Rob. accepted as Ageratina oligocephala (DC.) R.M.King & H.Rob.
- Species Eupatorium erythrolepis Sch.Bip. accepted as Lorentzianthus viscidus (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium erythropappum B.L.Rob. accepted as Ageratina ligustrina (DC.) R.M.King & H.Rob.
- Species Eupatorium esmeraldae Cuatrec. accepted as Ageratina rhypodes (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium esperanzae Hassl. accepted as Ayapanopsis esperanzae (Hassl.) R.M.King & H.Rob.
- Species Eupatorium espinosarum A.Gray accepted as Ageratina espinosarum (A.Gray) R.M.King & H.Rob.
- Species Eupatorium estrellense Hassl. accepted as Heterocondylus lysimachioides (Chodat) R.M.King & H.Rob.
- Species Eupatorium etlense B.L.Rob. accepted as Ageratina etlensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium eucosmoides B.L.Rob. accepted as Kaunia eucosmoides (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium eucosmum B.L.Rob. accepted as Kaunia saltensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium eugenei Small accepted as Eupatorium pinnatifidum Elliott
- Species Eupatorium euonymifolium Greene accepted as Ageratina lemmonii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium euphyes B.L.Rob. accepted as Ayapanopsis euphyes (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium eurybiaefolium Greene accepted as Ageratina altissima (L.) R.M.King & H.Rob.
- Species Eupatorium eurybiifolium Greene accepted as Ageratina altissima (L.) R.M.King & H.Rob.
- Species Eupatorium exacoides G.Don ex Baker accepted as Ichthyothere terminalis (Spreng.) S.F.Blake
- Species Eupatorium exerto-venosum Klatt
- Species Eupatorium exerto-venosum Klatt ex Hook.f. & Jacks. accepted as Ageratina fastigiata (Kunth) R.M.King & H.Rob.
- Species Eupatorium exiguum Klotzsch ex Steetz accepted as Condylidium iresinoides (Kunth) R.M.King & H.Rob.
- Species Eupatorium eximium B.L.Rob. accepted as Neomirandea eximia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium exsertovenosum Klatt accepted as Ageratina fastigiata (Kunth) R.M.King & H.Rob.
- Species Eupatorium extensum Gardner accepted as Chromolaena extensa (Gardner) R.M.King & H.Rob.
- Species Eupatorium extrorsum Sch.Bip. ex Baker accepted as Chromolaena ivaefolia (L.) R.M.King & H.Rob.
- Species Eupatorium falcatum Michaux accepted as Eupatorium purpureum L.
- Species Eupatorium falcatum Michx. accepted as Eutrochium purpureum var. purpureum
- Species Eupatorium farinosum B.L.Rob. accepted as Chromolaena farinosa (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium farinosum B.L.Rob. ex Pittier accepted as Chromolaena farinosa (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium fasciculare Poepp. accepted as Chromolaena ivaefolia (L.) R.M.King & H.Rob.
- Species Eupatorium fastigiatum Benth.
- Species Eupatorium fastigiatum Kunth accepted as Ageratina fastigiata (Kunth) R.M.King & H.Rob.
- Species Eupatorium fendleri (A.Gray) A.Gray accepted as Brickelliastrum fendleri (A.Gray) R.M.King & H.Rob.
- Species Eupatorium fernaldii R.K.Godfrey accepted as Eupatorium album L.
- Species Eupatorium ferreyrae (R.M.King & H.Rob.) B.L.Turner
- Species Eupatorium ferreyrii (R.M.King & H.Rob.) B.L.Turner accepted as Cronquistianthus ferreyrii R.M.King & H.Rob.
- Species Eupatorium ferruginascens Sch.Bip. ex Baker accepted as Barrosoa candolleana (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium ferrugineum Gardner accepted as Chromolaena ferruginea (Gardner) R.M.King & H.Rob.
- Species Eupatorium ferrugineum Labill. accepted as Ozothamnus ferrugineus (Labill.) Sweet
- Species Eupatorium fiebrigii Hieron.
- Species Eupatorium fiebrigii Hassl. accepted as Chacoa pseudoprasiifolia (Hassl.) R.M.King & H.Rob.
- Species Eupatorium filicaule Sch.Bip. ex A.Gray accepted as Koanophyllon solidaginoides var. filicaule (A.Gray) B.L.Turner
- Species Eupatorium filifolium Hassl. accepted as Disynaphia filifolia (Hassl.) R.M.King & H.Rob.
- Species Eupatorium finlaysonianum Wall.
- Species Eupatorium finlaysonianum Wall. ex DC. accepted as Eupatorium cannabinum L.
- Species Eupatorium firmum Glaz.
- Species Eupatorium fissifolium Larran.
- Species Eupatorium fissifolium Larrañaga
- Species Eupatorium fistulosum B.L.Rob. accepted as Neomirandea angularis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium fistulosum Barratt
- Species Eupatorium flaccidum Spreng. ex DC. accepted as Brickellia diffusa (Vahl) A.Gray
- Species Eupatorium flavidulum Urb. & Ekman accepted as Koanophyllon flavidulum (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium flavisetum B.L.Rob. accepted as Ageratina flaviseta (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium flexicaule Schnittsp.
- Species Eupatorium flexile B.L.Rob. accepted as Koanophyllon flexilis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium flexuosum Roxb.
- Species Eupatorium flexuosum Lam. accepted as Faujasia flexuosa (Lam.) Benth. & Hook.f. ex Hook.f. & B.D.Jacks.
- Species Eupatorium floribundum Kunth accepted as Chromolaena odorata (L.) R.M.King & H.Rob.
- Species Eupatorium floridanum Raf. ex Torr. & A.Gray accepted as Eupatorium altissimum L.
- Species Eupatorium flourensifolium B.L.Turner accepted as Ageratina flourensifolia (B.L.Turner) R.M.King & H.Rob.
- Species Eupatorium foeniculaceum Willd. accepted as Eupatorium capillifolium (Lam.) Small ex Porter & Britton
- Species Eupatorium foeniculoides Walter accepted as Eupatorium capillifolium (Lam.) Small ex Porter & Britton
- Species Eupatorium foliatum Sch.Bip. ex Baker
- Species Eupatorium foliatum Hieron. accepted as Chromolaena pedunculosa (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium foliolosum Wall. ex DC. accepted as Pluchea indica (L.) Less.
- Species Eupatorium formosanum Hayata
- Species Eupatorium fortunei Turcz.
- Species Eupatorium fotunei
- Species Eupatorium fragile B.L.Rob. accepted as Fleischmannia fragilis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium fraseri Hort.
- Species Eupatorium fraseri Poir.
- Species Eupatorium frasieri Poiret accepted as Ageratina altissima (L.) R.M.King & H.Rob.
- Species Eupatorium frasieri Poir. accepted as Ageratina altissima (L.) R.M.King & H.Rob.
- Species Eupatorium fraternum DC. accepted as Ayapana amygdalina (Lam.) R.M.King & H.Rob.
- Species Eupatorium freyresi Thunb. accepted as Ophryosporus freyreysii (Thunb.) Baker
- Species Eupatorium freyreysi Thunb. accepted as Ophryosporus freyreysii (Thunb.) Baker
- Species Eupatorium frustratum B.L.Rob. accepted as Chromolaena frustrata (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium fruticosum L.
- Species Eupatorium fruticosum Desf. accepted as Kuhnia frutescens Hornem.
- Species Eupatorium fruticosum Mill. accepted as Mikania houstoniana (L.) B.L.Rob.
- Species Eupatorium fuertesii Urb. accepted as Vernonia fuertesii (Urb.) H.Rob.
- Species Eupatorium fuertesii Urban accepted as Vernonanthura fuertesii (Urb.) H.Rob.
- Species Eupatorium fuliginosum Kunth accepted as Condylopodium fuliginosum (Kunth) R.M.King & H.Rob.
- Species Eupatorium fulvum Raf.
- Species Eupatorium fulvum Hook. & Arn. accepted as Mikania fulva (Hook. & Arn.) Baker
- Species Eupatorium funckii B.L.Rob. accepted as Ageratina funckii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium furcatum Lam. accepted as Chromolaena ivaefolia (L.) R.M.King & H.Rob.
- Species Eupatorium fuscorubrum Walter accepted as Eupatorium purpureum L.
- Species Eupatorium fuscum N.E.Br. accepted as Koanophyllon fuscum (N.E.Br.) R.M.King & H.Rob.
- Species Eupatorium gabbii Urb. accepted as Koanophyllon gabbii (Urb.) R.M.King & H.Rob.
- Species Eupatorium galeanum B.L.Turner accepted as Koanophyllon galeanum (B.L.Turner) B.L.Turner
- Species Eupatorium galeopsifolium Gardner accepted as Gymnocondylus galeopsifolius (Gardner) R.M.King & H.Rob.
- Species Eupatorium galeottii B.L.Rob. accepted as Koanophyllon galeottii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium ganophyllum Mattf. ex Pilg. accepted as Morithamnus ganophyllus (Mattf. ex Pilg.) R.M.King & H.Rob.
- Species Eupatorium gardnerianum Hieron. accepted as Campuloclinium hirsutum Gardner
- Species Eupatorium gascae B.L.Rob. accepted as Aristeguietia gascae (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium gaudichaudianum DC. accepted as Grazielia gaudichaudeana (DC.) R.M.King & H.Rob.
- Species Eupatorium gayanum Wedd. accepted as Aristeguietia gayana (Wedd.) R.M.King & H.Rob.
- Species Eupatorium geminatum McVaugh accepted as Ageratina geminata (McVaugh) R.M.King & H.Rob.
- Species Eupatorium gentianoides (B.L.Rob.) B.L.Rob. accepted as Chromolaena gentianoides (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium geranifolium Urb. accepted as Chromolaena geranifolia (Urb.) R.M.King & H.Rob.
- Species Eupatorium gibbosum Urb. accepted as Koanophyllon gibbosum (Urb.) R.M.King & H.Rob.
- Species Eupatorium gibertii Baker ex Herter
- Species Eupatorium gilbertii B.L.Rob. accepted as Ageratina gilbertii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium glabellum Hort.
- Species Eupatorium glabellum accepted as Ageratina ligustrina (DC.) R.M.King & H.Rob.
- Species Eupatorium glaberrimum DC. accepted as Chromolaena glaberrima (DC.) R.M.King & H.Rob.
- Species Eupatorium glabratum Hort.Berol.
- Species Eupatorium glabratum Hort.
- Species Eupatorium glabratum Kunth accepted as Ageratina glabrata (Kunth) R.M.King & H.Rob.
- Species Eupatorium glabratum Hort. ex Kunth accepted as Ageratina modesta (Kunth) R.M.King & H.Rob.
- Species Eupatorium glabriusculum DC. accepted as Heterocondylus alatus (Vell.) R.M.King & H.Rob.
- Species Eupatorium glabrum Heyne ex Wall. accepted as Vernonia bracteata Wall. ex Hook.f.
- Species Eupatorium glabrum B.Heyne ex Wall. accepted as Acilepis silhetensis (DC.) H.Rob.
- Species Eupatorium glanduliferum Hieron. accepted as Ageratina glandulifera (Hieron.) R.M.King & H.Rob.
- Species Eupatorium glanduliferum Hieron. ex Sodiro accepted as Ageratina glandulifera (Hieron.) R.M.King & H.Rob.
- Species Eupatorium glandulifolium Hieron.
- Species Eupatorium glandulitectum B.L.Rob.
- Species Eupatorium glandulosissimum Malme accepted as Ayapana amygdalina (Lam.) R.M.King & H.Rob.
- Species Eupatorium glandulosum Kunth accepted as Ageratina adenophora (Spreng.) R.M.King & H.Rob.
- Species Eupatorium glandulosum Sch.Bip. ex Baker accepted as Ayapana amygdalina (Lam.) R.M.King & H.Rob.
- Species Eupatorium glandulosum Michaux accepted as Eupatorium album L.
- Species Eupatorium glandulosum Michx. accepted as Eupatorium album var. album L.
- Species Eupatorium glastifolium Bertol. accepted as Carphephorus odoratissimus (J.F.Gmel.) H.J.-C.Hebert
- Species Eupatorium glaucescens Elliott accepted as Eupatorium cuneifolium Willd.
- Species Eupatorium glaucescens Ellis accepted as Eupatorium cuneifolium Willd.
- Species Eupatorium glaucum Sch.Bip. ex A.Gray
- Species Eupatorium glaucum Sch.Bip. ex B.L.Rob.
- Species Eupatorium glaucum Sch.Bip. ex Klatt accepted as Ageratina glauca (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium glaziovii Baker accepted as Campuloclinium purpurascens (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium glechomaefolium Moc. ex DC. accepted as Brickellia veronicaefolia (Kunth) A.Gray
- Species Eupatorium glechomifolium Moc. ex DC.
- Species Eupatorium glechonophyllum Less. accepted as Ageratina glechonophylla (Less.) R.M.King & H.Rob.
- Species Eupatorium glehni F.Schmidt ex Trautv. accepted as Eupatorium chinense L.
- Species Eupatorium glehnii F.Schmidt ex Trautv.
- Species Eupatorium glischrum B.L.Rob. accepted as Ageratina glischra (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium gloeocladum B.L.Rob. accepted as Ageratina gloeoclada (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium glomeratum DC. accepted as Cronquistianthus glomeratus (DC.) R.M.King & H.Rob.
- Species Eupatorium glumaceum DC. accepted as Condylidium iresinoides (Kunth) R.M.King & H.Rob.
- Species Eupatorium glutinosum Lam. accepted as Aristeguietia glutinosa (Lam.) R.M.King & H.Rob.
- Species Eupatorium glyptophlebium B.L.Rob. accepted as Ageratina glyptophlebia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium gnaphalioides Cabrera
- Species Eupatorium gnidioides DC. accepted as Disynaphia ligulaefolia (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium godfreyanum Cronquist
- Species Eupatorium gongorae Cuatrec. accepted as Asplundianthus arcuans (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium goniocladum Dusén
- Species Eupatorium gonocladum DC. accepted as Ageratina glabrata (Kunth) R.M.King & H.Rob.
- Species Eupatorium gonzalezii B.L.Rob. accepted as Fleischmannia gonzalezii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium gouani Hort. ex Spreng. accepted as Salmea eupatoria DC.
- Species Eupatorium gouanii Hort. ex Spreng. accepted as Salmea eupatoria DC.
- Species Eupatorium goyazense Glaz. accepted as Ayapana amygdalina (Lam.) R.M.King & H.Rob.
- Species Eupatorium gracile D.Don ex Hook. & Arn. accepted as Ageratina glechonophylla (Less.) R.M.King & H.Rob.
- Species Eupatorium gracile Kunth accepted as Ageratina gracilis (Kunth) R.M.King & H.Rob.
- Species Eupatorium gracilentum B.L.Rob. accepted as Ageratina gracilenta (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium gracilicaule Sch.Bip. ex B.L.Rob. accepted as Koanophyllon gracilicaule (Sch.Bip. ex B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium graciliflorum DC. accepted as Chromolaena odorata (L.) R.M.King & H.Rob.
- Species Eupatorium gracilipes Urb. accepted as Koanophyllon gracilipes (Urb.) R.M.King & H.Rob.
- Species Eupatorium gracillimum Hayata accepted as Eupatorium tashiroi Hayata
- Species Eupatorium graminifolium Chodat accepted as Campovassouria cruciata (Vell.) R.M.King & H.Rob.
- Species Eupatorium grande Sch.Bip. ex Baker accepted as Heterocondylus grandis (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium grandiceps Wright accepted as Koanophyllon grandiceps (C.Wright) R.M.King & H.Rob.
- Species Eupatorium grandidentatum DC. accepted as Ageratina pazcuarensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium grandiflorum Hook. accepted as Brickellia grandiflora (Hook.) Nutt.
- Species Eupatorium grandiflorum André accepted as Bartlettina sordida (Less.) R.M.King & H.Rob.
- Species Eupatorium grandifolium Regel accepted as Ageratina grandifolia (Regel) R.M.King & H.Rob.
- Species Eupatorium greggii A.Gray accepted as Conoclinium greggii (A.Gray) Small
- Species Eupatorium grisebachi Molt. & Gomez accepted as Critonia imbricata Griseb.
- Species Eupatorium grisebachianum Alain accepted as Koanophyllon grisebachianum (Alain) R.M.King & H.Rob.
- Species Eupatorium grisebachii Molinet & M.Gómez accepted as Critonia imbricata Griseb.
- Species Eupatorium griseopubescens Dusén ex Malme accepted as Campuloclinium burchellii (Baker) R.M.King & H.Rob.
- Species Eupatorium griseo-viride Sch.Bip. ex Baker accepted as Koanophyllon adamantium (Gardner) R.M.King & H.Rob.
- Species Eupatorium griseum J.M.Coult.
- Species Eupatorium griseum Coulter accepted as Peteravenia grisea (J.M.Coult.) R.M.King & H.Rob.
- Species Eupatorium grossedentatum Mart. ex Colla
- Species Eupatorium grossidentatum Hieron. accepted as Kaunia grossidentata (Hieron.) R.M.King & H.Rob.
- Species Eupatorium gryposepalum Lunell
- Species Eupatorium guadalupense DC. accepted as Fleischmannia microstemon (Cass.) R.M.King & H.Rob.
- Species Eupatorium guadalupense Spreng. accepted as Fleischmannia microstemon (Cass.) R.M.King & H.Rob.
- Species Eupatorium guanaiense Britton accepted as Chromolaena ivaefolia (L.) R.M.King & H.Rob.
- Species Eupatorium guapulense Klatt accepted as Hebeclinium tetragonum Benth.
- Species Eupatorium guatemalense Regel
- Species Eupatorium guatemalense Regel ex Walp. accepted as Fleischmannia guatemalensis R.M.King & H.Rob.
- Species Eupatorium guerreroanum (B.L.Turner) B.L.Turner accepted as Koanophyllon guerreroanum B.L.Turner
- Species Eupatorium guevarae R.M.King & H.Rob. accepted as Hebeclinium guevarae (R.M.King & H.Rob.) R.M.King & H.Rob.
- Species Eupatorium guiengolense L.Torres & Villaseñor accepted as Chromolaena guiengolense (L.Torres & Villaseñor) B.L.Turner
- Species Eupatorium gundlachii Urb. accepted as Koanophyllon gundlachii (Urb.) R.M.King & H.Rob.
- Species Eupatorium gynoxioides (Rusby) (Rusby)
- Species Eupatorium gynoxioides Rusby accepted as Kaunia gynoximorpha (Rusby ex B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium gynoxoides Wedd. accepted as Ageratina gynoxoides (Wedd.) R.M.King & H.Rob.
- Species Eupatorium gynoxymorphum Rusby
- Species Eupatorium gynoxymorphum Rusby ex B.L.Rob. accepted as Kaunia gynoximorpha (Rusby ex B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium haageanum Regel & Körn. accepted as Ageratina haageana (Regel & Körn.) H.Rob.
- Species Eupatorium haenkeanum DC. accepted as Chromolaena haenkeana (DC.) R.M.King & H.Rob.
- Species Eupatorium hagelundii Matzenb.
- Species Eupatorium hakonense Nakai accepted as Eupatorium chinense L.
- Species Eupatorium halbertianum McVaugh accepted as Ageratina halbertiana (McVaugh) R.M.King & H.Rob.
- Species Eupatorium halimifolium DC. accepted as Disynaphia halimifolia (DC.) R.M.King & H.Rob.
- Species Eupatorium hammatocladum B.L.Rob. & Britton
- Species Eupatorium hammatocladum Britton & B.L.Rob. accepted as Koanophyllon hammatocladum (B.L.Rob. & Britton) R.M.King & H.Rob.
- Species Eupatorium hardwarense Proctor ex C.D.Adams accepted as Koanophyllon hardwarense R.M.King & H.Rob.
- Species Eupatorium harnedii E.S.Steele ex Harned accepted as Eupatorium purpureum L.
- Species Eupatorium harrisii Urb. accepted as Ageratina riparia (Regel) R.M.King & H.Rob.
- Species Eupatorium hartii Urb. accepted as Ageratina hartii (Urb.) R.M.King & H.Rob.
- Species Eupatorium hartwegi Benth. accepted as Conoclinium betonicifolium (Mill.) R.M.King & H.Rob.
- Species Eupatorium hartwegii Benth. accepted as Conoclinium betonicifolium (Mill.) R.M.King & H.Rob.
- Species Eupatorium harvardianum Steyerm. accepted as Bahianthus viscosus (Spreng.) R.M.King & H.Rob.
- Species Eupatorium hasslerianum Chodat accepted as Ayapana amygdalina (Lam.) R.M.King & H.Rob.
- Species Eupatorium hastatum L. accepted as Mikania hastata (L.) Willd.
- Species Eupatorium hastiferum Standl. & Steyerm. accepted as Bartlettina hastifera (Standl. & Steyerm.) R.M.King & H.Rob.
- Species Eupatorium hastile S.Schauer accepted as Critonia spinaciifolia (DC.) R.M.King & H.Rob.
- Species Eupatorium haughtii B.L.Rob. accepted as Chromolaena haughtii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium havanense Kunth accepted as Ageratina havanensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium heathiae B.L.Turner accepted as Adenocritonia heathiae (B.L.Turner) R.M.King & H.Rob.
- Species Eupatorium hebebotrya Hemsl.
- Species Eupatorium hebebotrya (DC.) Hemsley accepted as Critonia hebebotrya DC.
- Species Eupatorium hebebotryum (DC.) Hemsl. accepted as Critonia hebebotrya DC.
- Species Eupatorium hebecladum DC. accepted as Barrosoa candolleana (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium hebes H.Rob.
- Species Eupatorium hebes B.L.Rob. accepted as Ageratina hebes (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hecatanthum (DC.) Baker
- Species Eupatorium hecatanthum Klatt accepted as Urolepis hecatantha (DC.) R.M.King & H.Rob.
- Species Eupatorium hecatanthum Sch.Bip. accepted as Ayapanopsis didyma (Klatt) R.M.King & H.Rob.
- Species Eupatorium hederaefolium A.Gray accepted as Ageratina hederaefolia (A.Gray) R.M.King & H.Rob.
- Species Eupatorium hederifolium A.Gray accepted as Ageratina hederifolia (A.Gray) R.M.King & H.Rob.
- Species Eupatorium helenae Buscal. & Muschl.
- Species Eupatorium helianthemoides B.L.Rob. accepted as Koanophyllon helianthemoides (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium helianthifolium Kunth accepted as Badilloa helianthifolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium hemipteropodum B.L.Rob. accepted as Critonia hemipteropoda (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hemisphaericum DC. accepted as Bartlettina hemisphaerica (DC.) R.M.King & H.Rob.
- Species Eupatorium heptaneurum Urb. accepted as Koanophyllon heptaneurum (Urb.) R.M.King & H.Rob.
- Species Eupatorium heptanthum Sch.Bip. accepted as Ophryosporus heptanthus (Sch.Bip. ex Wedd.) R.M.King & H.Rob.
- Species Eupatorium heptanthum Sch.Bip. ex Rusby accepted as Ageratina sternbergiana (DC.) R.M.King & H.Rob.
- Species Eupatorium heptanthum Sch.Bip. ex Wedd. accepted as Ophryosporus heptanthus (Sch.Bip. ex Wedd.) R.M.King & H.Rob.
- Species Eupatorium herbaceum (A.Gray) Greene accepted as Ageratina herbacea (A.Gray) R.M.King & H.Rob.
- Species Eupatorium herrerae B.L.Rob. accepted as Badilloa herrerae (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium herzogii B.L.Rob. accepted as Chromolaena herzogii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium heteroclinium Griseb. accepted as Chromolaena heteroclinia (Griseb.) R.M.King & H.Rob.
- Species Eupatorium heterolaenum Sch.Bip. ex Baker accepted as Grazielia serrata (Spreng.) R.M.King & H.Rob.
- Species Eupatorium heterolepis B.L.Rob. accepted as Neomirandea araliaefolia (Less.) R.M.King & H.Rob.
- Species Eupatorium heteroneuron (Emst) B.L.Rob. accepted as Critonia heteroneura Ernst
- Species Eupatorium heteroneurum (Ernst) B.L.Rob. accepted as Critonia heteroneura Ernst
- Species Eupatorium heterophyllum A.Rich. accepted as Grisebachianthus holquinensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium heterophyllum DC. accepted as Eupatorium cannabinum L.
- Species Eupatorium heterosquameum Urb. & Ekman accepted as Chromolaena heterosquamea (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium hexanthum DC. accepted as Chromolaena hirsuta (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium heydeanum B.L.Rob. accepted as Amolinia heydeana (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hickenii Cabrera & Vittet accepted as Campuloclinium hickenii (Cabrera & Vittet) R.M.King & H.Rob.
- Species Eupatorium hidalgense B.L.Rob. accepted as Ageratina hidalgensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hidalgense H.Rob. accepted as Ageratina hidalgensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hidrodes B.L.Rob. accepted as Koanophyllon hidrodes (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hiemale Lillo accepted as Kaunia lasiophthalma (Griseb.) R.M.King & H.Rob.
- Species Eupatorium hieronymi S.E.Freire
- Species Eupatorium hilarii B.L.Rob. accepted as Malmeanthus hilarii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hintonii (R.M.King & H.Rob.) B.L.Turner accepted as Bartlettina hintonii R.M.King & H.Rob.
- Species Eupatorium hintoniorum B.L.Turner accepted as Koanophyllon hintoniorum B.L.Turner
- Species Eupatorium hirsutissimum Baker accepted as Dasycondylus hirsutissimus (Baker) R.M.King & H.Rob.
- Species Eupatorium hirsutum (Torr.) Nieuwl.
- Species Eupatorium hirsutum DC. accepted as Ageratina liebmannii (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium hirsutum Hook. & Arn. accepted as Chromolaena hirsuta (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium hirsutum (Gardner) Baker accepted as Campuloclinium hirsutum Gardner
- Species Eupatorium hirtum Less.
- Species Eupatorium hirtum Baker accepted as Mikania hirsutissima DC.
- Species Eupatorium hispidulum (DC.) Malme accepted as Chromolaena maximiliani (Schrad. ex DC.) R.M.King & H.Rob.
- Species Eupatorium hispidum Pers.
- Species Eupatorium hitchcockii B.L.Rob. accepted as Neomirandea homogama (Hieron.) H.Rob. & Brettell
- Species Eupatorium hoffmannii Kuntze accepted as Sphaereupatorium scandens (Gardner) R.M.King & H.Rob.
- Species Eupatorium holguinense B.L.Rob. accepted as Grisebachianthus holquinensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium holwayanum B.L.Rob. accepted as Fleischmannia holwayana (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium holzingeri Rydb. accepted as Eupatorium purpureum L.
- Species Eupatorium hondurense B.L.Rob. accepted as Koanophyllon hondurensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hookerianum Griseb. accepted as Chromolaena hookeriana (Griseb.) R.M.King & H.Rob.
- Species Eupatorium horminoides (DC.) Baker accepted as Chromolaena horminoides DC.
- Species Eupatorium horsfieldii Mig. accepted as Austroeupatorium inulaefolium (Kunth) R.M.King & H.Rob.
- Species Eupatorium horsfieldii Miq. accepted as Austroeupatorium inulifolium (Kunth) R.M.King & H.Rob.
- Species Eupatorium hosanense B.L.Rob. accepted as Kaunia hosanensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hospitale B.L.Rob. accepted as Critonia hospitalis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hotteanum Urb. & Ekman accepted as Koanophyllon hotteanum (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium houstonianum L. accepted as Mikania houstoniana (L.) B.L.Rob.
- Species Eupatorium houstonis Hort. ex DC.
- Species Eupatorium houstonis Sw. accepted as Mikania swartziana Griseb.
- Species Eupatorium houstonis L. accepted as Mikania houstoniana (L.) B.L.Rob.
- Species Eupatorium hualienense C.H.Ou, S.W.Chung & C.I Peng
- Species Eupatorium huambutiense Cabrera accepted as Helogyne tacaquirensis Hieron.
- Species Eupatorium huantae B.L.Rob. accepted as Koanophyllon huantae (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium huanucanum B.L.Turner accepted as Cronquistianthus macbridei R.M.King & H.Rob.
- Species Eupatorium huehuetecum Standl. & Steyerm. accepted as Ageratina pichinchensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium huigrense B.L.Rob. accepted as Fleischmannia huigrensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium humboldtii Hieron. accepted as Ageratina asclepiadea (L.f.) R.M.King & H.Rob.
- Species Eupatorium humile (Benth.) B.L.Rob. accepted as Lourteigia humilis (Benth.) R.M.King & H.Rob.
- Species Eupatorium humile (Benth.) Hieron. accepted as Lourteigia humilis (Benth.) R.M.King & H.Rob.
- Species Eupatorium hunzigeri Hieron. accepted as Gyptis crassipes (Hieron.) R.M.King & H.Rob.
- Species Eupatorium hygrohylaeum B.L.Rob. accepted as Hebeclinium hygrohylaeum (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hygrophilum Alain accepted as Spaniopappus hygrophilus (Alain) R.M.King & H.Rob.
- Species Eupatorium hylibates B.L.Rob. accepted as Jaramilloa hylibates (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hylobium B.L.Rob. accepted as Bartlettina hylobia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hylonomum B.L.Rob. accepted as Koanophyllon hylonoma (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hylophilum B.L.Rob. accepted as Ayapana hylophila (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hylophorbum B.L.Rob. accepted as Hebeclinium hylophorbum (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hymenolepis B.L.Rob. accepted as Fleischmannia pycnocephala (Less.) R.M.King & H.Rob.
- Species Eupatorium hymenophyllum Klatt accepted as Fleischmannia hymenophylla (Klatt) R.M.King & H.Rob.
- Species Eupatorium hymenophyllum Klatt ex T.Durand & Pitt. accepted as Fleischmannia hymenophylla (Klatt) R.M.King & H.Rob.
- Species Eupatorium hypargyrum B.L.Rob. accepted as Grosvenoria hypargyra (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hypericifolium Kunth accepted as Chromolaena hypericifolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium hypodictyon B.L.Rob. accepted as Chromolaena hypodictya (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hypoleucum Griseb. accepted as Grisebachianthus hypoleucus (Griseb.) R.M.King & H.Rob.
- Species Eupatorium hypomalacum B.L.Rob. accepted as Koanophyllon hypomalaca (B.L.Rob. ex B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hypomalacum B.L.Rob. ex J.D. Smith accepted as Koanophyllon hypomalaca (B.L.Rob. ex B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hypomalacum B.L.Rob. ex Donn.Sm. accepted as Koanophyllon hypomalaca (B.L.Rob. ex B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium hyrcanicum Steven accepted as Eupatorium cannabinum L.
- Species Eupatorium hyssopifolium L.
- Species Eupatorium hyssopifolium A.Gray
- Species Eupatorium hyssopinum A.Gray accepted as Ageratina hyssopina (A.Gray) R.M.King & H.Rob.
- Species Eupatorium ianthinum (Hook.) Hemsley accepted as Bartlettina sordida (Less.) R.M.King & H.Rob.
- Species Eupatorium ianthinum (Morren) Hemsl. accepted as Bartlettina sordida (Less.) R.M.King & H.Rob.
- Species Eupatorium ibaguense Sch.Bip. ex Hieron. accepted as Ageratina ibaguensis (Sch.Bip. ex Hieron.) R.M.King & H.Rob.
- Species Eupatorium ibaquense Sch.Bip. ex Hieron.
- Species Eupatorium ignoratum Hieron. accepted as Kaunia ignorata (Hieron.) R.M.King & H.Rob.
- Species Eupatorium ignotum V.M.Badillo accepted as Fleischmannia ignota (V.M.Badillo) R.M.King & H.Rob.
- Species Eupatorium illitum Urb. accepted as Ageratina illita (Urb.) R.M.King & H.Rob.
- Species Eupatorium iltisii (R.M.King & H.Rob.) Whittem. ex B.L.Turner accepted as Critonia iltisii R.M.King & H.Rob.
- Species Eupatorium imbricatum (Griseb.) Urb. accepted as Critonia imbricata Griseb.
- Species Eupatorium imitans B.L.Rob. accepted as Fleischmannia imitans (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium impetiolare Griseb. accepted as Chromolaena impetiolaris (Griseb.) Nicolson
- Species Eupatorium inaequidens B.L.Rob.
- Species Eupatorium inaequidens Urb. accepted as Critonia inaequidens (Urb.) R.M.King & H.Rob.
- Species Eupatorium inamoenum Mart. ex Baker accepted as Trichogonia villosa (Spreng.) Sch.Bip. ex Baker
- Species Eupatorium incanum Sch.Bip. ex Baker accepted as Disynaphia halimifolia (DC.) R.M.King & H.Rob.
- Species Eupatorium incarnatum Walter accepted as Fleischmannia incarnata (Walter) R.M.King & H.Rob.
- Species Eupatorium incarum B.L.Rob. accepted as Nothobaccharis candolleana (Steud.) R.M.King & H.Rob.
- Species Eupatorium incasicum Wedd. accepted as Ageratina pentlandiana (DC.) R.M.King & H.Rob.
- Species Eupatorium incisum Griseb. accepted as Koanophyllon grisebachianum (Alain) R.M.King & H.Rob.
- Species Eupatorium incisum (A.Gray) Chapm. accepted as Ageratina jucunda (Greene) Clewell & Wooten
- Species Eupatorium incisum Chapman accepted as Ageratina jacunda (Greene) A.Clewell & Wooton
- Species Eupatorium incisum Rich. accepted as Chromolaena odorata (L.) R.M.King & H.Rob.
- Species Eupatorium incomptum DC. accepted as Decachaeta incompta (DC.) R.M.King & H.Rob.
- Species Eupatorium inconspicuum Sch.Bip. accepted as Ageratina glechonophylla (Less.) R.M.King & H.Rob.
- Species Eupatorium indigofera D.Parodi accepted as Koanophyllon tinctorium Arruda
- Species Eupatorium innumerosum DC. accepted as Ageratina deltoidea (Jacq.) R.M.King & H.Rob.
- Species Eupatorium insigne Malme accepted as Praxelis insignia (Malme) R.M.King & H.Rob.
- Species Eupatorium integerrimum Spreng. ex Baker accepted as Austrocritonia velutina (Gardner) R.M.King & H.Rob.
- Species Eupatorium integrifolium Bertero
- Species Eupatorium integrifolium Bertero ex Spreng. accepted as Chromolaena integrifolia (Bertero ex Spreng.) R.M.King & H.Rob.
- Species Eupatorium intercostulatum B.L.Rob. accepted as Ageratina intercostulata (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium intermedium DC. accepted as Grazielia intermedia (DC.) R.M.King & H.Rob.
- Species Eupatorium inulaefolium Kunth accepted as Austroeupatorium inulaefolium (Kunth) R.M.King & H.Rob.
- Species Eupatorium inulifolium Kunth
- Species Eupatorium inulifolium (Kunth) Hieron. accepted as Austroeupatorium inulaefolium (Kunth) R.M.King & H.Rob.
- Species Eupatorium involucratum Sch.Bip. accepted as Grazielia schultzii R.M.King & H.Rob.
- Species Eupatorium iodopappum Sch.Bip. ex Hemsl.
- Species Eupatorium iodostylum B.L.Rob. accepted as Spaniopappus iodostylus (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium iodotrichum B.L.Rob. accepted as Ageratina iodotricha (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium iresinoides Kunth accepted as Condylidium iresinoides (Kunth) R.M.King & H.Rob.
- Species Eupatorium iridolepis B.L.Rob. accepted as Chromolaena iridolepis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium irrasum (B.L.Rob.) H.Rob. accepted as Ageratina irrasa (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium irrasum (B.L.Rob.) B.L.Rob. accepted as Ageratina irrasa (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium isillumense B.L.Rob. accepted as Koanophyllon isillumense (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium isolepis B.L.Rob. accepted as Ageratina isolepis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium itacolumiense Sch.Bip. ex Baker accepted as Heterocondylus itacolumiensis (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium itatiayense Hieron. accepted as Symphyopappus itatiayensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium iteophyllum Urb. & Ekman accepted as Koanophyllon iteophyllum (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium ivaefolium L. accepted as Chromolaena ivaefolia (L.) R.M.King & H.Rob.
- Species Eupatorium ivifolium L. accepted as Chromolaena ivifolia (L.) R.M.King & H.Rob.
- Species Eupatorium ixiocladon Benth.
- Species Eupatorium ixiocladon Klatt
- Species Eupatorium ixiocladon Benth. ex Oersted accepted as Ageratina ixiocladon R.M.King & H.Rob.
- Species Eupatorium ixiocladon Benth. ex Oerst. accepted as Ageratina ixiocladon R.M.King & H.Rob.
- Species Eupatorium ixodes Benth. accepted as Ayapana amygdalina (Lam.) R.M.King & H.Rob.
- Species Eupatorium jacquemontii Urb.
- Species Eupatorium jaegerianum Urb. accepted as Koanophyllon jaegerianum (Urb.) R.M.King & H.Rob.
- Species Eupatorium jahnii B.L.Rob. accepted as Ageratina jahnii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium jajoense Aristeg. accepted as Hebeclinium jajoense (Aristeg.) R.M.King & H.Rob.
- Species Eupatorium jamesonii Turcz. accepted as Cronquistianthus niveus (Kunth) R.M.King & H.Rob.
- Species Eupatorium japonicum Thunb. accepted as Eupatorium chinense L.
- Species Eupatorium jaraguense B.L.Rob. accepted as Heterocondylus jaraguensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium javanicum Boerl. accepted as Austroeupatorium inulifolium (Kunth) R.M.King & H.Rob.
- Species Eupatorium javanicum Blume accepted as Vernonia arborea Buch.-Ham.
- Species Eupatorium jejunum Standl. & Steyerm. accepted as Fleischmannia capillipes (Benth. ex Oerst.) R.M.King & H.Rob.
- Species Eupatorium jelskii Hieron. accepted as Chromolaena jelskii (Hieron.) R.M.King & H.Rob.
- Species Eupatorium jenssenii Urb. accepted as Koanophyllon jenssenii (Urb.) R.M.King & H.Rob.
- Species Eupatorium jucundum Greene accepted as Ageratina jucunda (Greene) Clewell & Wooten
- Species Eupatorium jugipaniculatum Rusby accepted as Koanophyllon jugipaniculatum (Rusby) R.M.King & H.Rob.
- Species Eupatorium jujuiense Hieron. accepted as Chromolaena hookeriana (Griseb.) R.M.King & H.Rob.
- Species Eupatorium juninense B.L.Rob. accepted as Koanophyllon juninense (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium junquitense V.M.Badillo accepted as Ageratina ibaguensis (Sch.Bip. ex Hieron.) R.M.King & H.Rob.
- Species Eupatorium juticalpense Standl. & L.O.Williams ex Ant.Molina
- Species Eupatorium kalenbornianum B.L.Rob. accepted as Cronquistianthus kalenbornianus (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium karuaiense V.M.Badillo accepted as Praxelis karuaiensis (V.M.Badillo) R.M.King & H.Rob.
- Species Eupatorium karwinskianum DC. accepted as Bartlettina karwinskiana (DC.) R.M.King & H.Rob.
- Species Eupatorium kavanayense V.M.Badillo accepted as Koanophyllon kavanayense (V.M.Badillo) R.M.King & H.Rob.
- Species Eupatorium keckii Vatke
- Species Eupatorium kiirunense (Kitam.) C.H.Ou & S.W.Chung accepted as Eupatorium luchuense var. kiirunense Kitam.
- Species Eupatorium killipii B.L.Rob. accepted as Hebeclinium killipii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium kingii Cabrera
- Species Eupatorium kirilowii Turcz. accepted as Eupatorium lindleyanum DC.
- Species Eupatorium klattianum Hieron. accepted as Fleischmannia klattiana (Hieron.) R.M.King & H.Rob.
- Species Eupatorium klattii Millsp. accepted as Chromolaena odorata (L.) R.M.King & H.Rob.
- Species Eupatorium kleinii Cabrera accepted as Chromolaena kleinii (Cabrera) R.M.King & H.Rob.
- Species Eupatorium kleinioides Kunth accepted as Praxelis kleinioides (Kunth) Sch.Bip.
- Species Eupatorium koelliaefolium Greene accepted as Ageratina hyssopina (A.Gray) R.M.King & H.Rob.
- Species Eupatorium koelliifolium Greene
- Species Eupatorium kuhnia Crantz accepted as Brickellia eupatorioides (L.) Shinners
- Species Eupatorium kunthianum Sch.Bip.
- Species Eupatorium kunthianum Sch.Bip. ex Hieron. accepted as Chromolaena bullata (Klatt) R.M.King & H.Rob.
- Species Eupatorium kuntzei Hieron. accepted as Ophryosporus macrodon Griseb.
- Species Eupatorium kupperi Suesseng. accepted as Ageratina kupperi (Suess.) R.M.King & H.Rob.
- Species Eupatorium kupperi Suess. accepted as Ageratina kupperi (Suess.) R.M.King & H.Rob.
- Species Eupatorium laciniatum Kitam. accepted as Eupatorium chinense L.
- Species Eupatorium laetevirens Hook. & Arn. accepted as Austroeupatorium laetevirens (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium laeve Griseb. accepted as Ophryosporus lorentzii Hieron.
- Species Eupatorium laeve DC. accepted as Koanophyllon tinctorium Arruda
- Species Eupatorium laevigatulum B.L.Rob. accepted as Chromolaena christieana (Baker) R.M.King & H.Rob.
- Species Eupatorium laevigatum Griseb.
- Species Eupatorium laevigatum Torr. accepted as Eupatorium purpureum L.
- Species Eupatorium laevigatum Lam. accepted as Chromolaena laevigata (Lam.) R.M.King & H.Rob.
- Species Eupatorium lallavei Baill.
- Species Eupatorium lallavei Baillon
- Species Eupatorium lambertianum Wall. accepted as Eupatorium cannabinum L.
- Species Eupatorium lamiifolium Link accepted as Dasycondylus resinosus (Spreng.) R.M.King & H.Rob.
- Species Eupatorium lamiifolium Kunth accepted as Aristeguietia lamiifolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium lanatum Spreng. ex DC. accepted as Inula cappa (Buch.-Ham. ex D.Don) DC.
- Species Eupatorium lanceolatum Muhl.
- Species Eupatorium lanceolatum Mühlenb. ex Willd. accepted as Eupatorium pilosum Walter
- Species Eupatorium lanceolatum Sessé & Moc. accepted as Fleischmanniopsis leucocephala (Benth.) R.M.King & H.Rob.
- Species Eupatorium lanceolatum Muhl. ex Willd. accepted as Eupatorium pilosum Walter
- Species Eupatorium lancifolium (Torr. & A.Gray) Small
- Species Eupatorium lanicaule B.L.Rob. accepted as Critonia lanicaulis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium lanigerum Hook. & Arn. accepted as Gyptis lanigera (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium lantanifolium Griseb. accepted as Grisebachianthus lantanifolius (Griseb.) R.M.King & H.Rob.
- Species Eupatorium lanulatum B.L.Rob. accepted as Lourteigia lanulata (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium larcheanum Urb.
- Species Eupatorium larense V.M.Badillo accepted as Chromolaena larensis (V.M.Badillo) R.M.King & H.Rob.
- Species Eupatorium lasiolepis B.L.Rob. accepted as Gyptis crassipes (Hieron.) R.M.King & H.Rob.
- Species Eupatorium lasioneuron Hook. & Arn. accepted as Ageratina lasioneura (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium lasiophthalmum Griseb. accepted as Kaunia lasiophthalma (Griseb.) R.M.King & H.Rob.
- Species Eupatorium lasium B.L.Rob. accepted as Ageratina lasia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium lasseauxii (Carrière) Olmsted, Coville & H.P.Kelsey
- Species Eupatorium lasseauxii Hort.
- Species Eupatorium lasseauxii (Carrière) Wittmack accepted as Barrosoa candolleana (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium lasseauxii (Carrière) Herter accepted as Barrosoa candolleana (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium lasseauxii (Carrière) Olmsted, Cov. & Kelsey accepted as Barrosoa candolleana (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium latidens Small accepted as Ageratina aromatica (L.) Spach
- Species Eupatorium latifolium Less. ex Baker accepted as Mikania argyreiae DC.
- Species Eupatorium latipaniculatum Rusby accepted as Ayapanopsis latipaniculata (Rusby) R.M.King & H.Rob.
- Species Eupatorium latipes Benth. accepted as Ageratina latipes (Benth.) R.M.King & H.Rob.
- Species Eupatorium latisquamulosum (Hieron.) Malme accepted as Chromolaena latisquamulosa (Hieron.) R.M.King & H.Rob.
- Species Eupatorium laurifolium B.L.Rob. accepted as Critonia billbergiana (Beurl.) R.M.King & H.Rob.
- Species Eupatorium lavandulaefolium DC. accepted as Cronquistianthus lavandulaefolius (DC.) R.M.King & H.Rob.
- Species Eupatorium lavandulifolium DC. accepted as Cronquistianthus lavandulifolius (DC.) R.M.King & H.Rob.
- Species Eupatorium laxicephalum Cabrera accepted as Fleischmannia laxicephala (Cabrera) R.M.King & H.Rob.
- Species Eupatorium laxum Gardner accepted as Fleischmannia laxa (Gardner) R.M.King & H.Rob.
- Species Eupatorium lebrijense B.L.Rob. accepted as Critoniella lebrijensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium lecheaefolium Greene accepted as Eupatorium hyssopifolium L.
- Species Eupatorium lecheifolium Greene accepted as Eupatorium hyssopifolium var. hyssopifolium L.
- Species Eupatorium lehmannianum Klatt accepted as Ageratina tinifolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium leiophyllum Less. accepted as Ageratina havanensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium leivense Hieron. accepted as Chromolaena leivensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium lemassonii Biau accepted as Eupatorium cannabinum L.
- Species Eupatorium lemmoni B.L.Rob. accepted as Ageratina lemmonii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium lemmonii B.L.Rob. accepted as Ageratina lemmonii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium leonense B.L.Rob. accepted as Flyriella leonensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium leptocephalum DC. accepted as Chromolaena leptocephala (DC.) R.M.King & H.Rob.
- Species Eupatorium leptodictyon A.Gray accepted as Ageratina leptodictyon (A.Gray) R.M.King & H.Rob.
- Species Eupatorium leptolepis Baker accepted as Heterocondylus leptolepis (Baker) R.M.King & H.Rob.
- Species Eupatorium leptophlebium (B.L.Rob.) Steyerm. accepted as Raulinoreitzia leptophlebia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium leptophyllum DC.
- Species Eupatorium leptopodum Gardner accepted as Brickellia diffusa (Vahl) A.Gray
- Species Eupatorium leucanthum Klotzsch ex Walp. accepted as Conyza modesta Kunth
- Species Eupatorium leucocephalum Benth. accepted as Fleischmanniopsis leucocephala (Benth.) R.M.King & H.Rob.
- Species Eupatorium leucocephalum (Gardner) Malme accepted as Chromolaena leucocephala Gardner
- Species Eupatorium leucoderme B.L.Rob. accepted as Koanophyllon albicaulis var. laxius B.L.Rob.
- Species Eupatorium leucodermum B.L.Rob. accepted as Koanophyllon albicaulis (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium leucolepis (DC.) Torr. & A.Gray
- Species Eupatorium leucolithogena B.L.Rob. accepted as Critoniella leucolithogena (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium leucolithogenum B.L.Rob.
- Species Eupatorium leucomyelum B.L.Rob. accepted as Ageratina neriifolia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium leucophyllum Kunth accepted as Cronquistianthus leucophyllus (Kunth) R.M.King & H.Rob.
- Species Eupatorium leucotrichium Sch.Bip. ex Baker accepted as Chromolaena verbenacea (DC.) R.M.King & H.Rob.
- Species Eupatorium liatrideum DC. accepted as Chromolaena squarrulosa (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium libanoticum Sch.Bip. accepted as Grisebachianthus libanotica (Sch.Bip.) R.M.King & H.Rob.
- Species Eupatorium liebmannii Hemsl. accepted as Decachaeta perornata (Klatt) R.M.King & H.Rob.
- Species Eupatorium liebmannii Hemsley accepted as Decachaeta perornata (Klatt) R.M.King & H.Rob.
- Species Eupatorium liebmannii Sch.Bip. ex Klatt accepted as Ageratina liebmannii (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium liemannii Sch.Bip.
- Species Eupatorium ligulaefolium Hook. & Arn. accepted as Disynaphia ligulaefolia (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium ligulifolium Hook. & Arn.
- Species Eupatorium ligustaefolium DC. accepted as Ageratina ligustrina (DC.) R.M.King & H.Rob.
- Species Eupatorium ligustrinum DC. accepted as Ageratina ligustrina (DC.) R.M.King & H.Rob.
- Species Eupatorium lilacinum Hieron. accepted as Chromolaena lilacina (Hieron.) R.M.King & H.Rob.
- Species Eupatorium lilloi B.L.Rob. accepted as Idiothamnus lilloi (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium lindenianum A.Rich. accepted as Koanophyllon villosum (Sw.) R.M.King & H.Rob.
- Species Eupatorium lindheimerianum Scheele accepted as Ageratina havanensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium lindleyanum DC.
- Species Eupatorium lindleyanum F.Muell. accepted as Eupatorium cannabinum L.
- Species Eupatorium lineare Malme accepted as Chromolaena ivaefolia (L.) R.M.King & H.Rob.
- Species Eupatorium linearifolium Michaux accepted as Eupatorium hyssopifolium L.
- Species Eupatorium linearifolium Michx. accepted as Eupatorium hyssopifolium L.
- Species Eupatorium linearifolium Walter accepted as Eupatorium cuneifolium Willd.
- Species Eupatorium lineatum Sch.Bip. ex Baker
- Species Eupatorium linifolium DC. accepted as Campovassouria cruciata (Vell.) R.M.King & H.Rob.
- Species Eupatorium lithophilum B.L.Rob. accepted as Fleischmannia lithophila (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium littorale Alain
- Species Eupatorium littorale Cabrera accepted as Disynaphia littoralis (Cabrera) R.M.King & H.Rob.
- Species Eupatorium lloense Hieron. accepted as Fleischmannia lloensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium lloense accepted as Fleischmannia lloensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium lobatifolium Cabrera accepted as Koanophyllon lobatifolia (Cabrera) R.M.King & H.Rob.
- Species Eupatorium lobatum B.L.Rob. accepted as Neocuatrecasia lobata (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium lobbii Klatt accepted as Dasycondylus lobbii (Klatt) R.M.King & H.Rob.
- Species Eupatorium lobuliferum B.L.Rob. accepted as Ageratina lobulifera (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium loefgrenii B.L.Rob. accepted as Stomatanthes loefgrenii (B.L.Rob.) H.Rob.
- Species Eupatorium loeseneri B.L.Rob. accepted as Ageratina loeseneri (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium longicaule Wall.
- Species Eupatorium longicaule Wall. ex DC. accepted as Eupatorium cannabinum L.
- Species Eupatorium longifolium B.L.Rob. accepted as Koanophyllon longifolia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium longipes A.Gray accepted as Phanerostylis pedunculosa (DC.) R.M.King & H.Rob.
- Species Eupatorium longipetiolatum Mart. ex Baker accepted as Trichogonia salviaefolia Gardner
- Species Eupatorium longipetiolatum Sch.Bip. accepted as Kaunia longipetiolata (Sch.Bip. ex Rusby) R.M.King & H.Rob.
- Species Eupatorium longipetiolatum Sch.Bip. ex Rusby accepted as Kaunia longipetiolata (Sch.Bip. ex Rusby) R.M.King & H.Rob.
- Species Eupatorium loniceroides Kunth accepted as Ayapana amygdalina (Lam.) R.M.King & H.Rob.
- Species Eupatorium lopezmirandae Cabrera accepted as Cronquistianthus lopez-mirandae (Cabrera) R.M.King & H.Rob.
- Species Eupatorium lorentzii Hieron. accepted as Ageratina lorentzii (Hieron.) R.M.King & H.Rob.
- Species Eupatorium loxense Hieron. accepted as Ageratina fastigiata (Kunth) R.M.King & H.Rob.
- Species Eupatorium loxense Klatt accepted as Ageratina exserto-venosa (Klatt) R.M.King & H.Rob.
- Species Eupatorium lozanoanum B.L.Rob. accepted as Critonia lozanoana (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium lozanoi Cuatrec. accepted as Lourteigia ballotaefolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium lucayanum Britton accepted as Chromolaena lucayana (Britton) R.M.King & H.Rob.
- Species Eupatorium lucentifolium L.O.Williams accepted as Critoniadelphus microdon (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium luchuense Nakai
- Species Eupatorium luciae-brauniae Fernald accepted as Ageratina luciae-brauniae (Fernald) R.M.King & H.Rob.
- Species Eupatorium lucidum Ortega accepted as Ageratina lucida (Ortega) R.M.King & H.Rob.
- Species Eupatorium lucidum Colla accepted as Ageratina lucida (Ortega) R.M.King & H.Rob.
- Species Eupatorium ludovicianum DC. accepted as Mikania cordifolia (L.f.) Willd.
- Species Eupatorium lundellii (R.M.King & H.Rob.) B.L.Turner accepted as Chromolaena lundellii R.M.King & H.Rob.
- Species Eupatorium lundianum DC. accepted as Dasycondylus resinosus (Spreng.) R.M.King & H.Rob.
- Species Eupatorium lupulinum Baker accepted as Chromolaena epaleacea Gardner
- Species Eupatorium luquense Chodat accepted as Chromolaena luqensis (Chodat) R.M.King & H.Rob.
- Species Eupatorium luteum Raf.
- Species Eupatorium luxii B.L.Rob. accepted as Bartlettina luxii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium luzoniense Llanos accepted as Ayapana triplinervis (Vahl) R.M.King & H.Rob.
- Species Eupatorium lymansmithii (B.L.Rob.) Steyerm.
- Species Eupatorium lyratum J.M.Coult. accepted as Blumea viscosa (Mill.) V.M.Badillo
- Species Eupatorium lyratum Coulter accepted as Blumea viscosa (Mill.) V.M.Badillo
- Species Eupatorium lysimachioides Chodat accepted as Heterocondylus lysimachioides (Chodat) R.M.King & H.Rob.
- Species Eupatorium macbridei B.L.Rob. accepted as Ageratina macbridei (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium macdougallii (R.M.King & H.Rob.) B.L.Turner accepted as Bartlettina macdougallii R.M.King & H.Rob.
- Species Eupatorium macranthum Sw. accepted as Chromolaena macrantha (Sw.) R.M.King & H.Rob.
- Species Eupatorium macrocephalum Less. accepted as Campuloclinium macrocephalum (Less.) DC.
- Species Eupatorium macrochaetum Urb. & Ekman
- Species Eupatorium macrodon (ex de Candolle) DC. accepted as Chromolaena macrodon (DC.) Nicolson
- Species Eupatorium macromeris B.L.Rob. accepted as Bartlettina macromeris (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium macrophylloides B.L.Rob. accepted as Critoniella vargasiana (DC.) R.M.King & H.Rob.
- Species Eupatorium macrophyllum L. accepted as Hebeclinium macrophyllum (L.) DC.
- Species Eupatorium macropodum (DC.) Urb.
- Species Eupatorium macropodum Baker
- Species Eupatorium macropodus (DC.) Urb.
- Species Eupatorium macropus (DC.) Urb. accepted as Critonia macropoda DC.
- Species Eupatorium macrum Standl. & Steyerm. accepted as Condylidium iresinoides (Kunth) R.M.King & H.Rob.
- Species Eupatorium maculatum L.
- Species Eupatorium madrense S.Watson accepted as Chromolaena bigelovii (A.Gray) R.M.King & H.Rob.
- Species Eupatorium maestrense Urb. accepted as Koanophyllon maestrense (Urb.) R.M.King & H.Rob.
- Species Eupatorium magdalenae Stehlé accepted as Critonia macropoda DC.
- Species Eupatorium magdalenense B.L.Rob. accepted as Fleischmannia magdalenensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium magistri L.O.Williams accepted as Critonia billbergiana (Beurl.) R.M.King & H.Rob.
- Species Eupatorium mairei Leveille accepted as Eupatorium chinense L.
- Species Eupatorium mairei H.Lév. accepted as Eupatorium cannabinum L.
- Species Eupatorium mairetianum DC. accepted as Ageratina mairetiana (DC.) R.M.King & H.Rob.
- Species Eupatorium makinoi T.Kawahara & Yahara
- Species Eupatorium malachophyllum Klatt accepted as Neocabreria malachophylla (Klatt) R.M.King & H.Rob.
- Species Eupatorium malacolepis B.L.Rob. accepted as Ageratina malacolepis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium mallotum B.L.Rob. accepted as Chromolaena mallota (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium malvaefolium DC. accepted as Peteravenia malvaefolia (DC.) R.M.King & H.Rob.
- Species Eupatorium malvifolium DC. accepted as Peteravenia malvifolia (DC.) R.M.King & H.Rob.
- Species Eupatorium mancoanum B.L.Rob. accepted as Neocuatrecasia mancoana (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium mandonii Sch.Bip. accepted as Campovassouria cruciata (Vell.) R.M.King & H.Rob.
- Species Eupatorium mapiriense Hieron. accepted as Austroeupatorium decemflorum (DC.) R.M.King & H.Rob.
- Species Eupatorium maracayuense Chodat
- Species Eupatorium margaritense (Hassl.) Hassl. accepted as Chromolaena margaritensis (Hassl.) R.M.King & H.Rob.
- Species Eupatorium marginatum Poepp. & Endl. accepted as Fleischmannia marginata (Poepp. & Endl.) R.M.King & H.Rob.
- Species Eupatorium mariarum B.L.Rob. accepted as Ageratina mariarum (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium maritimum E.E. Schill.
- Species Eupatorium marquezianum Gómez de la Maza
- Species Eupatorium marquezianum M.Gómez accepted as Mikania cordifolia (L.f.) Willd.
- Species Eupatorium marrubiifolium Hieron. accepted as Cronquistianthus marrubiifolius (Hieron.) R.M.King & H.Rob.
- Species Eupatorium marrubium Walter accepted as Eupatorium rotundifolium L.
- Species Eupatorium martii Mart. accepted as Chromolaena squalida (DC.) R.M.King & H.Rob.
- Species Eupatorium martiusii DC. accepted as Chromolaena squalida (DC.) R.M.King & H.Rob.
- Species Eupatorium mathewsii B.L.Rob. accepted as Ayapanopsis mathewsii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium mattogrossense Hieron. accepted as Chromolaena mattogrossensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium matudae (R.M.King & H.Rob.) B.L.Turner accepted as Fleischmannia matudae R.M.King & H.Rob.
- Species Eupatorium maximiliani Schrad. ex DC. accepted as Chromolaena maximiliani (Schrad. ex DC.) R.M.King & H.Rob.
- Species Eupatorium maxonii B.L.Rob. accepted as Bartlettina maxonii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium maxwelliae S.Moore accepted as Chromolaena heteroclinia (Griseb.) R.M.King & H.Rob.
- Species Eupatorium mayarense Alain accepted as Grisebachianthus mayarensis (Alain) R.M.King & H.Rob.
- Species Eupatorium mayorii B.L.Rob. accepted as Fleischmannia mayorii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium medullosum Urb.
- Species Eupatorium megacephalum Mart. ex Baker accepted as Campuloclinium megacephalum (Mart. ex Baker) R.M.King & H.Rob.
- Species Eupatorium megalophyllum (Lem.) N.E.Br. accepted as Bartlettina sordida (Less.) R.M.King & H.Rob.
- Species Eupatorium megalophyllum (Lem.) Klatt accepted as Bartlettina sordida (Less.) R.M.King & H.Rob.
- Species Eupatorium megaphyllum Baker accepted as Critonia morifolia (Mill.) R.M.King & H.Rob.
- Species Eupatorium megaphyllum M.E.Jones accepted as Critonia quadrangularis (DC.) R.M.King & H.Rob.
- Species Eupatorium megapotamicum Spreng.
- Species Eupatorium melanadenium Hance accepted as Eupatorium chinense L.
- Species Eupatorium melanolepis Sch.Bip. ex Hemsl.
- Species Eupatorium melanolepis Sch.Bip. ex Klatt accepted as Ageratina subinclusa (Klatt) R.M.King & H.Rob.
- Species Eupatorium melarhabdotrichum Gilli accepted as Polyanthina nemorosa (Klatt) R.M.King & H.Rob.
- Species Eupatorium melissaefolium D.Dietr.
- Species Eupatorium melissaefolium Lam. accepted as Stevia melissaefolia (Lam.) Sch.Bip.
- Species Eupatorium melissifolium D.Dietr.
- Species Eupatorium melissifolium Lam. accepted as Stevia melissifolia (DC.) Sch.Bip.
- Species Eupatorium melissoides Willd. accepted as Ageratina aromatica (L.) Spach
- Species Eupatorium memorabile Maguire & Wurdack accepted as Imeria memorabilis (Maguire & Wurdack) R.M.King & H.Rob.
- Species Eupatorium memorabile Maguire & Wurd. accepted as Imeria memorabilis (Maguire & Wurdack) R.M.King & H.Rob.
- Species Eupatorium mendax Standl. & Steyerm. accepted as Fleischmanniopsis mendax (Standl. & Steyerm.) R.M.King & H.Rob.
- Species Eupatorium mendezii DC. accepted as Chromolaena mendezii (DC.) R.M.King & H.Rob.
- Species Eupatorium menthaefolium Poepp. ex Spreng.
- Species Eupatorium menthaefolium Wall. ex C.B.Clarke accepted as Vernonia patula (Dryand.) Merr.
- Species Eupatorium menthifolium Wall. ex C.B.Clarke
- Species Eupatorium menthifolium Poepp. ex Spreng.
- Species Eupatorium mercedense B.L.Rob. accepted as Fleischmannia mercedensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium meridense B.L.Rob. accepted as Chromolaena meridensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium mesoreopolum B.L.Rob. accepted as Koanophyllon mesoreopolum (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium metense B.L.Rob. accepted as Barrosoa metensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium mexiae B.L.Rob. accepted as Bartlettina hemisphaerica (DC.) R.M.King & H.Rob.
- Species Eupatorium meyeri Pilg. accepted as Chromolaena asperrima (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium michelianum B.L.Rob. accepted as Chromolaena glaberrima (DC.) R.M.King & H.Rob.
- Species Eupatorium micrachaenium Sch.Bip. ex Baker accepted as Hatschbachiella tweedieana (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium micranthon J.F.Gmel. accepted as Mikania parviflora (Aubl.) H.Karst.
- Species Eupatorium micranthon J.F.Gmelin accepted as Mikania parviflora (Aubl.) H.Karst.
- Species Eupatorium micranthum Lag. accepted as Ageratum corymbosum Zucc. ex Pers.
- Species Eupatorium micranthum Less. accepted as Ageratina ligustrina (DC.) R.M.King & H.Rob.
- Species Eupatorium microcephalum Regel
- Species Eupatorium microcephalum A.Gray accepted as Decachaeta scabrella (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium microchaeteum Urb. & Ekman accepted as Koanophyllon microchaeteum (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium microdon B.L.Rob. accepted as Critoniadelphus microdon (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium microphyllum A.Gray
- Species Eupatorium microphyllum A.Gray ex Durieu & Jacks.
- Species Eupatorium microphyllum L.f. accepted as Lourteigia microphylla (L.f.) R.M.King & H.Rob.
- Species Eupatorium microstemon Cass. accepted as Fleischmannia microstemon (Cass.) R.M.King & H.Rob.
- Species Eupatorium mikaniifolium B.L.Rob. accepted as Bishovia mikaniifolia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium mikanioides Chapm.
- Species Eupatorium militare B.L.Rob. accepted as Gyptidium militare (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium milleri steudel accepted as Porophyllum punctatum (Mill.) S.F.Blake
- Species Eupatorium milleri Steud. accepted as Porophyllum punctatum (Mill.) S.F.Blake
- Species Eupatorium mimicum Standl. & Steyerm. accepted as Koanophyllon mimica (Standl. & Steyerm.) R.M.King & H.Rob.
- Species Eupatorium minarum Standl. & L.O.Williams
- Species Eupatorium minasgeraense Hieron.
- Species Eupatorium minasgeraesense Hieron. accepted as Chromolaena minasgeraesensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium minasgeraesensis Hieron.
- Species Eupatorium minutifolium Alain accepted as Koanophyllon minutifolium (Alain) R.M.King & H.Rob.
- Species Eupatorium miquihuanum B.L.Turner accepted as Ageratina miquihuana (B.L.Turner) R.M.King & H.Rob.
- Species Eupatorium miradorense Hieron. accepted as Bartlettina brevipetiolata (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium miragoanae Urb. accepted as Koanophyllon miragoanae (Urb.) R.M.King & H.Rob.
- Species Eupatorium misellum McVaugh accepted as Chromolaena misella (McVaugh) R.M.King & H.Rob.
- Species Eupatorium miserum B.L.Rob. accepted as Fleischmannia misera (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium missionum Malme accepted as Praxelis missiona (Malme) R.M.King & H.Rob.
- Species Eupatorium modestum Kunth accepted as Ageratina modesta (Kunth) R.M.King & H.Rob.
- Species Eupatorium mohrii Greene
- Species Eupatorium molinae L.O.Williams accepted as Neomirandea ovandensis R.M.King & H.Rob.
- Species Eupatorium molinum B.L.Rob. accepted as Chromolaena molina (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium molle Mutis
- Species Eupatorium molle (Torr. & A.Gray) Nieuwl.
- Species Eupatorium molle Kunth accepted as Austroeupatorium inulaefolium (Kunth) R.M.King & H.Rob.
- Species Eupatorium molle Sw. accepted as Hebeclinium macrophyllum (L.) DC.
- Species Eupatorium molle Bertero ex DC. accepted as Koanophyllon puberulum (DC.) R.M.King & H.Rob.
- Species Eupatorium mollicomum B.L.Rob. accepted as Grazielia mollicoma (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium mollissimum Sch.Bip. ex Baker accepted as Grazielia mollissima (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium monagasense V.M.Badillo accepted as Fleischmannia monagasensis (V.M.Badillo) R.M.King & H.Rob.
- Species Eupatorium monanthum Sch.Bip. accepted as Neohintonia monantha (Sch.Bip.) R.M.King & H.Rob.
- Species Eupatorium monardaefolium Walp. accepted as Austroeupatorium silphiifolium (Mart.) R.M.King & H.Rob.
- Species Eupatorium monardifolium Walp. accepted as Austroeupatorium silphiifolium (Mart.) R.M.King & H.Rob.
- Species Eupatorium mononeurum Urb. accepted as Chromolaena mononeura (Urb.) R.M.King & H.Rob.
- Species Eupatorium montanum Sw. accepted as Koanophyllon montanum (Sw.) R.M.King & H.Rob.
- Species Eupatorium montevidense Spreng. accepted as Baccharis coridifolia DC.
- Species Eupatorium monticola L.O.Williams accepted as Ageratina subinclusa (Klatt) R.M.King & H.Rob.
- Species Eupatorium montigenum Standl. & Steyerm. accepted as Bartlettina montigena (Standl. & Steyerm.) R.M.King & H.Rob.
- Species Eupatorium moralense B.L.Rob.
- Species Eupatorium morelense B.L.Rob. accepted as Ageratina rufa (Greene) R.M.King & H.Rob.
- Species Eupatorium morelosense B.L.Rob.
- Species Eupatorium morichalanum Aristeg. accepted as Barrosoa metensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium morifolium Mill. accepted as Critonia morifolia (Mill.) R.M.King & H.Rob.
- Species Eupatorium morisii h. pat. ex Vis. accepted as Ageratina lucida (Ortega) R.M.King & H.Rob.
- Species Eupatorium moritense Aristeg. accepted as Chromolaena moritensis (Aristeg.) R.M.King & H.Rob.
- Species Eupatorium moritibense B.L.Rob. accepted as Prolobus nitidulus (Baker) R.M.King & H.Rob.
- Species Eupatorium moritzianum Sch.Bip.
- Species Eupatorium moritzianum Sch.Bip. ex Hieron. accepted as Chromolaena moritziana (Sch.Bip. ex Hieron.) R.M.King & H.Rob.
- Species Eupatorium mornicola Urb. & Ekman accepted as Koanophyllon mornicola (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium mortonianum Alain accepted as Ageratina mortoniana (Alain) R.M.King & H.Rob.
- Species Eupatorium mucronatum Gardner accepted as Chromolaena mucronata (Gardner) R.M.King & H.Rob.
- Species Eupatorium muelleri Sch.Bip. ex Klatt accepted as Ageratina muelleri (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium multicaulum (DC.) M.Gómez accepted as Phania multicaulis DC.
- Species Eupatorium multicrenulatum Sch.Bip. ex Baker accepted as Disynaphia multicrenulata (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium multifidum DC. accepted as Mikania anethifolia (DC.) Matzenb.
- Species Eupatorium multiflorum Larrañaga
- Species Eupatorium multiflorum Larran.
- Species Eupatorium multiflorum Baker accepted as Barrosoa organensis (Gardner) R.M.King & H.Rob.
- Species Eupatorium multiflosculosum DC. accepted as Chromolaena multiflosculosa (DC.) R.M.King & H.Rob.
- Species Eupatorium multifolium B.L.Rob. accepted as Disynaphia ligulaefolia (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium multinerve Benth. accepted as Fleischmannia multinervis (Benth.) R.M.King & H.Rob.
- Species Eupatorium multiplinerve Benth. ex Ant.Molina
- Species Eupatorium multiserratum Sch.Bip. accepted as Ageratina multiserrata (Sch.Bip.) R.M.King & H.Rob.
- Species Eupatorium muricatum Alain accepted as Koanophyllon muricatum (Alain) R.M.King & H.Rob.
- Species Eupatorium mutiscuense B.L.Rob. accepted as Ageratina mutiscuensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium mygindifolium A.Gray accepted as Ageratina mygindaefolia (A.Gray) R.M.King & H.Rob.
- Species Eupatorium myosotifolium Jacq. accepted as Cyanthillium cinereum (L.) H.Rob.
- Species Eupatorium myriadenium S.Schauer
- Species Eupatorium myriadenium Schauer accepted as Ageratina ligustrina (DC.) R.M.King & H.Rob.
- Species Eupatorium myrianthum Less. ex Baker accepted as Mikania myriocephala DC.
- Species Eupatorium myrianthum Klatt accepted as Decachaeta thieleana (Klatt ex Klatt) R.M.King & H.Rob.
- Species Eupatorium myricifolium (B.L.Rob.) Steyerm. accepted as Symphyopappus myricifolius B.L.Rob.
- Species Eupatorium myriocephalum Gardner accepted as Chromolaena myriocephala (Gardner) R.M.King & H.Rob.
- Species Eupatorium myriocephalum Klatt accepted as Decachaeta thieleana (Klatt ex Klatt) R.M.King & H.Rob.
- Species Eupatorium myriophyllum Dusén
- Species Eupatorium myrtilloides DC. accepted as Koanophyllon myrtilloides (DC.) R.M.King & H.Rob.
- Species Eupatorium mysorense B.Heyne ex DC. accepted as Pluchea tomentosa DC.
- Species Eupatorium naiguatensis (V.M.Badillo) Steyerm. accepted as Critonia naiguatensis (V.M.Badillo) R.M.King & H.Rob.
- Species Eupatorium nanchuanense Y.Ling & C.Shih
- Species Eupatorium neaeanum DC. accepted as Chromolaena collina (DC.) R.M.King & H.Rob.
- Species Eupatorium neglectum B.L.Rob. accepted as Austroeupatorium neglectum (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium nelsonii Greenm.
- Species Eupatorium nelsonii B.L.Rob. accepted as Kyrsteniopsis nelsonii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium nemorale Greene accepted as Ageratina aromatica (L.) Spach
- Species Eupatorium nemorense Sch.Bip. accepted as Heterocondylus alatus (Vell.) R.M.King & H.Rob.
- Species Eupatorium nemorense Sch.Bip. ex Baker accepted as Lorentzianthus viscidus (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium nemorosum Klatt accepted as Polyanthina nemorosa (Klatt) R.M.King & H.Rob.
- Species Eupatorium nepalense Spreng. accepted as Vernonia divergens (DC.) Edgew.
- Species Eupatorium nepetaefolium Wawra
- Species Eupatorium nepetaefolium Kunth accepted as Brickellia secundiflora (Lag.) A.Gray
- Species Eupatorium nepetifolium Wawra
- Species Eupatorium nepetifolium Kunth accepted as Brickellia secundiflora var. nepetifolia (Kunth) B.L.Rob.
- Species Eupatorium nepetoides Lindl. ex Baker accepted as Fleischmannia prasiifolia (Griseb.) R.M.King & H.Rob.
- Species Eupatorium neriifolium B.L.Rob. accepted as Ageratina neriifolia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium nervosum Sw. accepted as Koanophyllon nervosum (Sw.) R.M.King & H.Rob.
- Species Eupatorium nervosum Siebold accepted as Baccharis nervosa DC.
- Species Eupatorium nervosum Sieber ex DC. accepted as Baccharis nervosa DC.
- Species Eupatorium neurolepis Torr. ex Torr. & A.Gray accepted as Chromolaena ivaefolia (L.) R.M.King & H.Rob.
- Species Eupatorium neurophyllum Sch.Bip. ex Baker accepted as Raulinoreitzia crenulata (Spreng.) R.M.King & H.Rob.
- Species Eupatorium nicaraguense B.L.Rob. accepted as Critonia nicaraguensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium niederleinii Hieron. accepted as Neocabreria malachophylla (Klatt) R.M.King & H.Rob.
- Species Eupatorium nigrescens Hook. & Arn. accepted as Chromolaena collina (DC.) R.M.King & H.Rob.
- Species Eupatorium nigrum Baiilon
- Species Eupatorium nigrum Baill.
- Species Eupatorium nipense B.L.Rob. accepted as Grisebachianthus nipensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium nitidulum Baker accepted as Prolobus nitidulus (Baker) R.M.King & H.Rob.
- Species Eupatorium nitidum DC. accepted as Litothamnus nitidus (DC.) W.C.Holmes
- Species Eupatorium niveum Kunth accepted as Cronquistianthus niveus (Kunth) R.M.King & H.Rob.
- Species Eupatorium nix Standl. & L.O.Williams
- Species Eupatorium nodiflorum Wall. ex DC.
- Species Eupatorium nodiflorum Wall.
- Species Eupatorium novae-angliae (Fernald) V.I.Sullivan ex A.Haines & Sorrie
- Species Eupatorium nubecularum Standl. & L.O.Williams
- Species Eupatorium nubigenoides B.L.Rob. accepted as Fleischmanniopsis nubigenoides (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium nubigenum Benth. accepted as Critoniadelphus nubigenus (Benth.) R.M.King & H.Rob.
- Species Eupatorium nubivagum L.O.Williams accepted as Ageratina prunellaefolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium nudiflorum A.Rich. accepted as Koanophyllon nudiflorum (A.Rich.) R.M.King & H.Rob.
- Species Eupatorium nudispermum Sessé & Moc. accepted as Ageratum maritimum Kunth
- Species Eupatorium nudosum (Spreng.) M.Gómez
- Species Eupatorium nudum Gardner accepted as Platypodanthera melissifolia (DC.) R.M.King & H.Rob.
- Species Eupatorium nummularia Hook. & Arn.
- Species Eupatorium nummularium Hook. & Arn. accepted as Grazielia nummularia (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium nutans Kunth accepted as Brickellia nutanticeps S.F.Blake
- Species Eupatorium oaxacanum Klatt accepted as Ageratina oaxacana (Klatt) R.M.King & H.Rob.
- Species Eupatorium oblongifolium Spreng. accepted as Stomatanthes oblongifolius (Sch.Bip. ex Baker) H.Rob.
- Species Eupatorium oblongifolium (Spreng.) Sch.Bip. ex Baker accepted as Stomatanthes oblongifolius (Sch.Bip. ex Baker) H.Rob.
- Species Eupatorium obovatum Raf. accepted as Eupatorium rotundifolium L.
- Species Eupatorium obovatum Willd. ex Less. accepted as Vernonia brasiliana (L.) Druce
- Species Eupatorium obovatum Willd. ex Baker accepted as Vernonanthura brasiliana (L.) H.Rob.
- Species Eupatorium obscurifolium Hieron. accepted as Fleischmannia obscurifolia (Hieron.) R.M.King & H.Rob.
- Species Eupatorium obscurifolium Hieron. ex Sodiro accepted as Fleischmannia obscurifolia (Hieron.) R.M.King & H.Rob.
- Species Eupatorium obscurum DC. accepted as Chromolaena ivaefolia (L.) R.M.King & H.Rob.
- Species Eupatorium obtusifolium Willd. accepted as Vernonia albicaulis (Vahl ex Pers.) Vahl ex Pers.
- Species Eupatorium obtusimssium DC.
- Species Eupatorium obtusisquamosum Hieron. accepted as Hebeclinium obtusisquamosum R.M.King & H.Rob.
- Species Eupatorium obtusisquamosum Hieron. ex Sodiro accepted as Hebeclinium obtusisquamosum R.M.King & H.Rob.
- Species Eupatorium obtusissimum DC. accepted as Koanophyllon obtusissimum (DC.) R.M.King & H.Rob.
- Species Eupatorium obtusissmum P. DC.
- Species Eupatorium ocanense B.L.Rob. accepted as Ageratina ocanensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium occidentale Hook. accepted as Ageratina occidentalis (Hook.) R.M.King & H.Rob.
- Species Eupatorium odontodactylum B.L.Rob. accepted as Praxelis odontodactyla (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium odoratissimum Hort.
- Species Eupatorium odoratissimum pharm. ex Wehmer
- Species Eupatorium odoratissimum accepted as Ageratina ligustrina (DC.) R.M.King & H.Rob.
- Species Eupatorium odoratum L. accepted as Chromolaena odorata (L.) R.M.King & H.Rob.
- Species Eupatorium odoratum Walter accepted as Ageratina altissima (L.) R.M.King & H.Rob.
- Species Eupatorium oerstedianum Benth. ex Oerst.
- Species Eupatorium oerstedianum Benth. accepted as Chromolaena glaberrima (DC.) R.M.King & H.Rob.
- Species Eupatorium oerstedianum Benth. ex Oersted accepted as Chromolaena glaberrima (DC.) R.M.King & H.Rob.
- Species Eupatorium officinale (Mart.) Baill. accepted as Mikania officinalis Mart.
- Species Eupatorium oinopolepis (Malme) Cabrera accepted as Chromolaena oinopolepis (Malme) R.M.King & H.Rob.
- Species Eupatorium oligadenium Alain accepted as Koanophyllon oligadenium (Alain) R.M.King & H.Rob.
- Species Eupatorium oliganthes Less. accepted as Brickellia oliganthes (Less.) A.Gray
- Species Eupatorium oligocephalum DC. accepted as Ageratina oligocephala (DC.) R.M.King & H.Rob.
- Species Eupatorium oligolepis Hemsley accepted as Conoclinium betonicifolium (Mill.) R.M.King & H.Rob.
- Species Eupatorium oligolepis (Kunze) Hemsl. accepted as Conoclinium betonicifolium (Mill.) R.M.King & H.Rob.
- Species Eupatorium omeiense Y.Ling & C.Shih
- Species Eupatorium omphaliaefolium Kunth & Bouché accepted as Neomirandea araliaefolia (Less.) R.M.King & H.Rob.
- Species Eupatorium omphaliaefolium Kunth & Bouché ex Walp. accepted as Neomirandea araliaefolia (Less.) R.M.King & H.Rob.
- Species Eupatorium omphaliifolium Kunth & C.D.Bouché
- Species Eupatorium opadoclinium (S.F.Blake) McVaugh accepted as Chromolaena opadoclinia (S.F.Blake) R.M.King & H.Rob.
- Species Eupatorium opiferum (Mart.) Baill. accepted as Mikania cordifolia (L.f.) Willd.
- Species Eupatorium opiferum (Martins) Baillon accepted as Mikania cordifolia (L.f.) Willd.
- Species Eupatorium oppositifolium Hoffsgg.
- Species Eupatorium oppositifolium Hoffmanns.
- Species Eupatorium orbiculatum DC. accepted as Vittetia orbiculata (DC.) R.M.King & H.Rob.
- Species Eupatorium orbignyanum Klatt accepted as Chromolaena orbignyana (Klatt) R.M.King & H.Rob.
- Species Eupatorium oregonum Nutt. accepted as Ageratina occidentalis (Hook.) R.M.King & H.Rob.
- Species Eupatorium oreithales Greenm. accepted as Ageratina prunellaefolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium oreophilum L.O.Williams accepted as Neomirandea biflora R.M.King & H.Rob.
- Species Eupatorium oresbioides B.L.Rob. accepted as Bartlettina oresbioides (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium oresbium B.L.Rob. accepted as Bartlettina oresbia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium organense Gaertn.
- Species Eupatorium organense Gardner accepted as Barrosoa organensis (Gardner) R.M.King & H.Rob.
- Species Eupatorium orgyale DC. accepted as Austroeupatorium inulaefolium (Kunth) R.M.King & H.Rob.
- Species Eupatorium orgyaloides B.L.Rob. accepted as Idiothamnus orgyaloides (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium origanoides Kunth accepted as Cronquistianthus origanoides (Kunth) R.M.King & H.Rob.
- Species Eupatorium origanoides Meyen & Walp. accepted as Ophryosporus heptanthus (Sch.Bip. ex Wedd.) R.M.King & H.Rob.
- Species Eupatorium orinocense (Kunth) M.Gómez accepted as Mikania micrantha Kunth
- Species Eupatorium orinocense (Kunth) Gómez de la Maza accepted as Mikania micrantha Kunth
- Species Eupatorium orizabae Sch.Bip.
- Species Eupatorium orizabae Sch.Bip. ex Hemsley accepted as Ageratina glauca (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium orizabae Sch.Bip. ex Hemsl. accepted as Ageratina glauca (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium ornatilobum B.L.Rob. accepted as Lourteigia ornatiloba (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium ornatum (R.M.King & H.Rob.) B.L.Turner accepted as Bartlettina ornata R.M.King & H.Rob.
- Species Eupatorium ornithophorum B.L.Rob. accepted as Ayapana ornithophora (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium orogenes L.O.Williams accepted as Neomirandea parasitica (Klatt) R.M.King & H.Rob.
- Species Eupatorium orphaliaefolium Kunth & Bouché ex Regel accepted as Neomirandea araliifolia (Less.) R.M.King & H.Rob.
- Species Eupatorium ortegae B.L.Rob. accepted as Chromolaena ortegae (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium oslenii B.L.Rob. accepted as Praxelis ostenii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium ossaeanum DC. accepted as Chromolaena ossaeana (DC.) R.M.King & H.Rob.
- Species Eupatorium osseanum DC.
- Species Eupatorium osseanum Sch.Bip. ex Baker accepted as Chromolaena laevigata (Lam.) R.M.King & H.Rob.
- Species Eupatorium ostenii B.L.Rob.
- Species Eupatorium oteroi Monach. accepted as Chromolaena oteroi (Monach.) R.M.King & H.Rob.
- Species Eupatorium ovaliflorum Hook. & Arn. accepted as Chromolaena glaberrima (DC.) R.M.King & H.Rob.
- Species Eupatorium ovandense Grashoff & Beaman accepted as Decachaeta ovandensis (Grashoff & Beaman) R.M.King & H.Rob.
- Species Eupatorium ovatifolium Hieron. accepted as Ageratina prunellaefolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium ovatum Bigelow accepted as Eupatorium rotundifolium var. ovatum (Bigelow) Torr. ex DC.
- Species Eupatorium ovatum J. Bigelow accepted as Eupatorium rotundifolium L.
- Species Eupatorium ovillum Standl. & Steyerm. accepted as Ageratina ovilla (Standl. & Steyerm.) R.M.King & H.Rob.
- Species Eupatorium oxychlaenum DC. accepted as Ayapana amygdalina (Lam.) R.M.King & H.Rob.
- Species Eupatorium oxyhedrum Baker accepted as Campuloclinium macrocephalum (Less.) DC.
- Species Eupatorium oxylepis Sch.Bip. ex Klatt
- Species Eupatorium oxylepis DC. accepted as Chromolaena oxylepis (DC.) R.M.King & H.Rob.
- Species Eupatorium oxylepis Sch.Bip. ex Baker accepted as Stomatanthes warmingii (Baker) H.Rob.
- Species Eupatorium oyadense Hieron. accepted as Chromolaena oyadensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium pabstii Regel
- Species Eupatorium pacacanum Klatt accepted as Fleischmannia pratensis (Klatt) R.M.King & H.Rob.
- Species Eupatorium pachanoi B.L.Rob. accepted as Kaunia pachanoi (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium pachyneurum Urb. accepted as Koanophyllon pachyneurum (Urb.) R.M.King & H.Rob.
- Species Eupatorium pachypodum B.L.Rob. accepted as Ageratina pachypoda (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium pacificum B.L.Rob. ex I.M.Johnst.
- Species Eupatorium pacificum B.L.Rob. accepted as Ageratina pacifica R.M.King & H.Rob.
- Species Eupatorium paezense Hieron. accepted as Bartlettina paezensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium palaeforme Klatt accepted as Ageratina deltoidea (Jacq.) R.M.King & H.Rob.
- Species Eupatorium paleaceum Sessé & Moc. accepted as Ageratum conyzoides L.
- Species Eupatorium pallescens DC. accepted as Austroeupatorium inulaefolium (Kunth) R.M.King & H.Rob.
- Species Eupatorium pallidum Hook. & Arn. accepted as Austroeupatorium inulaefolium (Kunth) R.M.King & H.Rob.
- Species Eupatorium palmare Sch.Bip. & Baker
- Species Eupatorium palmare Sch.Bip. ex Baker accepted as Chromolaena palmaris (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium palmeri A.Gray accepted as Koanophyllon palmeri (A.Gray) R.M.King & H.Rob.
- Species Eupatorium paludicola E.E.Schill. & LeBlond
- Species Eupatorium palustre (DC.) Baker accepted as Barrosoa betonicaeformis (DC.) R.M.King & H.Rob.
- Species Eupatorium pampalcense B.L.Rob. accepted as Ageratina pampalcensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium panamense (Carrière) N.E.Br. accepted as Bartlettina sordida (Less.) R.M.King & H.Rob.
- Species Eupatorium pandurifolium Baker accepted as Heterocondylus pandurifolius (Baker) R.M.King & H.Rob.
- Species Eupatorium paneroi (B.L.Turner) B.L.Turner accepted as Critonia paneroi B.L.Turner
- Species Eupatorium paniculatum Lam.
- Species Eupatorium paniculatum Schrad. accepted as Fleischmannia microstemon (Cass.) R.M.King & H.Rob.
- Species Eupatorium paniculatum Lindl. ex DC. accepted as Vernonia paniculata DC.
- Species Eupatorium paniculatum Mill. accepted as Brickellia paniculata (Mill.) B.L.Rob.
- Species Eupatorium pansamalense (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium pansamalense B.L.Rob. accepted as Bartlettina pansamalensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium papantlense Less. accepted as Ageratina havanensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium paradoxam Hook. & Arn. accepted as Ophryosporus paradoxus (Hook. & Arn.) Benth. & Hook. ex Hook.f. & B.D.Jac
- Species Eupatorium paradoxum Hook. & Arn. accepted as Ophryosporus paradoxus (Hook. & Arn.) Benth. & Hook. ex Hook.f. & B.D.Jac
- Species Eupatorium paraguariense Chodat
- Species Eupatorium paraguariense Hieron. accepted as Chromolaena paraguariensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium paramense Aristeg. accepted as Ageratina paramensis (Aristeg.) R.M.King & H.Rob.
- Species Eupatorium paranense Hook. & Arn. accepted as Austroeupatorium inulaefolium (Kunth) R.M.King & H.Rob.
- Species Eupatorium parasiticum Klatt accepted as Neomirandea parasitica (Klatt) R.M.King & H.Rob.
- Species Eupatorium parayanum J.Espinosa accepted as Ageratina parayana (Espinosa) B.L.Turner
- Species Eupatorium parietariaefolium Scheele
- Species Eupatorium parietariifolium Scheele
- Species Eupatorium parrulum Glaz. ex B.L.Rob. accepted as Campuloclinium parvulum (Glaz. ex Glaz.) R.M.King & H.Rob.
- Species Eupatorium parryi A.Gray accepted as Flyriella parryi (A.Gray) R.M.King & H.Rob.
- Species Eupatorium parviceps Malme accepted as Chromolaena parviceps (Malme) R.M.King & H.Rob.
- Species Eupatorium parviflorum (Aiton) Nieuwl.
- Species Eupatorium parviflorum Sw. accepted as Critonia parviflora (Sw.) DC.
- Species Eupatorium parviflorum Elliott accepted as Eupatorium semiserratum DC.
- Species Eupatorium parviflorum Aubl. accepted as Mikania parviflora (Aubl.) H.Karst.
- Species Eupatorium parvulum Glaz. accepted as Campuloclinium parvulum (Glaz. ex Glaz.) R.M.King & H.Rob.
- Species Eupatorium parvulum Glaz. ex B.L.Rob. accepted as Campuloclinium parvulum (Glaz. ex Glaz.) R.M.King & H.Rob.
- Species Eupatorium pasadenense Parish accepted as Ageratina adenophora (Spreng.) R.M.King & H.Rob.
- Species Eupatorium pastazae B.L.Rob. accepted as Fleischmannia pastazae (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium patagonicum Klatt accepted as Austrobrickellia patens (D.Don ex Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium patens Phil. accepted as Austroeupatorium patens (D.Don ex Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium patens D.Don ex Hook. & Arn. accepted as Austrobrickellia patens (D.Don ex Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium patens Philippi accepted as Austrobrickellia patens (D.Don ex Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium paucibracteatum Alain accepted as Ageratina paucibracteata (Alain) R.M.King & H.Rob.
- Species Eupatorium paucicapitulatum Hieron.
- Species Eupatorium paucicrenatum Urb. & Ekman accepted as Koanophyllon paucicrenatum (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium paucidentatum Sch.Bip. ex Baker accepted as Chromolaena connivens (Rusby) R.M.King & H.Rob.
- Species Eupatorium paucidentatum Sch.Bip. accepted as Chromolaena congesta (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium pauciflorum (Raf.) Raf.
- Species Eupatorium pauciflorum Wall. ex DC. accepted as Vernonia teres Wall. ex DC.
- Species Eupatorium pauciflorum Kunth accepted as Praxelis diffusa (Rich.) Pruski
- Species Eupatorium pauciflorum auct. non Kunth accepted as Praxelis clematidea (Griseb.) R.M.King & H.Rob.
- Species Eupatorium paulense Loefgr. accepted as Campuloclinium megacephalum (Mart. ex Baker) R.M.King & H.Rob.
- Species Eupatorium paulinum DC. accepted as Austroeupatorium paulinum (DC.) R.M.King & H.Rob.
- Species Eupatorium paulinum Mart. ex Baker accepted as Chromolaena squalida (DC.) R.M.King & H.Rob.
- Species Eupatorium pauperatum Kunth accepted as Lourteigia ballotaefolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium pauperculum A.Gray accepted as Ageratina paupercula (A.Gray) R.M.King & H.Rob.
- Species Eupatorium pavoniaefolium Sch.Bip. accepted as Symphyopappus decussatus Turcz.
- Species Eupatorium pavoniifolium Sch.Bip.
- Species Eupatorium pazcuarense Kunth accepted as Ageratina pazcuarensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium pectinatum Raf.
- Species Eupatorium pectinatum Small accepted as Eupatorium pinnatifidum Elliott
- Species Eupatorium pectinatum Wall. accepted as Vernonia pectinata DC.
- Species Eupatorium pedale Sch.Bip. ex Baker accepted as Chromolaena pedalis (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium pedunculosum (DC.) A.Gray accepted as Phanerostylis pedunculosa (DC.) R.M.King & H.Rob.
- Species Eupatorium pedunculosum Hook. & Arn. accepted as Chromolaena pedunculosa (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium pellium Klatt accepted as Chromolaena pellia (Klatt) R.M.King & H.Rob.
- Species Eupatorium pellucidum Kunth accepted as Critoniella acuminata (Kunth) R.M.King & H.Rob.
- Species Eupatorium pelotrophum B.L.Rob. accepted as Ageratina pelotropha (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium pendulum SCHRADER accepted as Brickellia pendula (Schrad.) A.Gray
- Species Eupatorium pendulum Schrad. accepted as Brickellia pendula (Schrad.) A.Gray
- Species Eupatorium peninsulare Brandegee accepted as Critonia peninsularis (Brandegee) R.M.King & H.Rob.
- Species Eupatorium pennellii B.L.Rob. accepted as Fleischmannia pennellii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium penninervatum Wurd. accepted as Guayania penninervata (Wurdack) R.M.King & H.Rob.
- Species Eupatorium penninervatum Wurdack accepted as Guayania penninervata (Wurdack) R.M.King & H.Rob.
- Species Eupatorium pennivenium (B.L.Rob.) Steyerm. accepted as Neocabreria pennivenia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium pentaflorum Larrañaga
- Species Eupatorium pentallorum Larran.
- Species Eupatorium pentanthum Sch.Bip. accepted as Raulinoreitzia crenulata (Spreng.) R.M.King & H.Rob.
- Species Eupatorium pentlandianum DC. accepted as Ageratina pentlandiana (DC.) R.M.King & H.Rob.
- Species Eupatorium pentlandicum DC. accepted as Ageratina pentlandica (DC.) R.M.King & H.Rob.
- Species Eupatorium perezioides B.L.Rob. accepted as Bartlettina perezioides (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium perfoliatum L.
- Species Eupatorium perforatum Sch.Bip. ex Baker accepted as Chromolaena perforata (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium perglabrum B.L.Rob. accepted as Chromolaena perglabra (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium pernambucense B.L.Rob. accepted as Stomatanthes pernambucensis (B.L.Rob.) H.Rob.
- Species Eupatorium perornatum Klatt accepted as Decachaeta perornata (Klatt) R.M.King & H.Rob.
- Species Eupatorium perpetiolatum (R.M.King & H.Rob.) L.O.Williams accepted as Pseudokyrsteniopsis perpetiolata R.M.King & H.Rob.
- Species Eupatorium perrinianum Spreng. accepted as Vernonanthura menthaefolia (Poepp. ex Spreng.) H.Rob.
- Species Eupatorium persicifolium Kunth accepted as Aristeguietia persicifolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium petalodium Britton ex Small accepted as Eupatorium album L.
- Species Eupatorium petaloideum Britton ex Britton accepted as Eupatorium album L.
- Species Eupatorium petasites Griseb. accepted as Bartlettina sordida (Less.) R.M.King & H.Rob.
- Species Eupatorium petiolare ex DC.
- Species Eupatorium petiolare Moc. & Sessé ex A.DC.
- Species Eupatorium petiolare André
- Species Eupatorium petiolare Moc. & Sessé ex DC. accepted as Ageratina petiolaris (Moc. & Sessé ex DC.) R.M.King & H.Rob.
- Species Eupatorium petiolata Banks & Soland.
- Species Eupatorium petraeum B.L.Rob. accepted as Decachaeta ovatifolia (DC.) R.M.King & H.Rob.
- Species Eupatorium petrophilum B.L.Rob. accepted as Austroeupatorium petrophilum (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium peuinatum Small accepted as Eupatorium pinnatifidum Elliott
- Species Eupatorium phanioides Urb. & Ekman accepted as Koanophyllon phanioides (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium pharcidodes B.L.Rob. ex Gleason accepted as Chromolaena pharcidodes (B.L.Rob. ex Gleason) R.M.King & H.Rob.
- Species Eupatorium phlebodes B.L.Rob. accepted as Trichogonia phlebodes (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium phlogifolium DC. accepted as Campovassouria cruciata (Vell.) R.M.King & H.Rob.
- Species Eupatorium phoenicolepis B.L.Rob. accepted as Peteravenia phoenicolepis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium phoenicticum B.L.Rob. accepted as Hebeclinium phoenicticum (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium photinum B.L.Rob. accepted as Ageratina photina (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium phyllocephalum Klatt
- Species Eupatorium piauhyense Gardner accepted as Raulinoreitzia crenulata (Spreng.) R.M.King & H.Rob.
- Species Eupatorium picardae Urb. accepted as Koanophyllon picardae (Urb.) R.M.King & H.Rob.
- Species Eupatorium pichinchense Kunth accepted as Ageratina pichinchensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium pictum Gardner accepted as Chromolaena picta (Gardner) R.M.King & H.Rob.
- Species Eupatorium picturatum Malme accepted as Austroeupatorium picturatum (Malme) R.M.King & H.Rob.
- Species Eupatorium pilluanense Hieron. accepted as Ayapana pilluanensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium pilluanense Gardner accepted as Ayapana pilluanensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium pilosum Walter
- Species Eupatorium pinabetense B.L.Rob. accepted as Bartlettina pinabetensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium pinetorum L.O.Williams & Ant.Molina accepted as Critonia hebebotrya DC.
- Species Eupatorium pinnangense V.M.Badillo accepted as Badilloa venezuelensis (V.M.Badillo) R.M.King & H.Rob.
- Species Eupatorium pinnatifidum Elliott
- Species Eupatorium pinnatifidum DC. accepted as Acanthostyles buniifolius (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium pinnatifissum H.Buek accepted as Acanthostyles buniifolius (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium pinnatifissum Buek. accepted as Acanthostyles buniifolius (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium pinnatipartitum Sch.Bip.
- Species Eupatorium pinnatipartitum Sch.Bip. ex Baker accepted as Stomatanthes pinnatipartitus (Sch.Bip. ex Baker) H.Rob.
- Species Eupatorium pinnatisectum Steud. accepted as Acanthostyles buniifolius (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium pinnatisectum steudel accepted as Acanthostyles buniifolius (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium pintobambense Cabrera
- Species Eupatorium piperitum Sessé & Moc. accepted as Ageratina glabrata (Kunth) R.M.King & H.Rob.
- Species Eupatorium piptolepis Sch.Bip. ex Baker accepted as Steyermarkina pyrifolia (DC.) R.M.King & H.Rob.
- Species Eupatorium piptopappum Sch.Bip.
- Species Eupatorium piquerioides DC. accepted as Ophryosporus piquerioides (DC.) Benth. ex Baker
- Species Eupatorium pithecobium B.L.Rob. accepted as Neomirandea pithecobia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium pitonianum Urb. & Ekman accepted as Koanophyllon pitonianum (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium pittieri Klatt accepted as Koanophyllon pittieri (Klatt) R.M.King & H.Rob.
- Species Eupatorium pittieri Klatt ex T.Durand & Pitt. accepted as Koanophyllon pittieri (Klatt) R.M.King & H.Rob.
- Species Eupatorium piurae B.L.Rob. accepted as Ageratina piurae (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium planellasianum Gomez & Molt. accepted as Phania domingensis (Spreng.) Griseb.
- Species Eupatorium planellasianum M.Gómez & Molinet accepted as Phania domingensis (Spreng.) Griseb.
- Species Eupatorium platychaetum Urb. accepted as Critonia platychaeta (Urb.) R.M.King & H.Rob.
- Species Eupatorium platylepis Baker accepted as Dasycondylus platylepis (Baker) R.M.King & H.Rob.
- Species Eupatorium platyphyllum B.L.Rob. accepted as Bartlettina platyphylla (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium plebeia Boiss.
- Species Eupatorium plectranthifolium Benth.
- Species Eupatorium plectranthifolium Benth. ex Oersted accepted as Fleischmannia plectranthifolia (Benth. ex Oerst.) R.M.King & H.Rob.
- Species Eupatorium plectranthifolium Benth. ex Oerst. accepted as Fleischmannia plectranthifolia (Benth. ex Oerst.) R.M.King & H.Rob.
- Species Eupatorium pleianthum (A.Gray) B.L.Rob. accepted as Dyscritogyne dryophila (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium plethadenium Standl. & Steyerm. accepted as Ageratina plethadenia (Standl. & Steyerm.) R.M.King & H.Rob.
- Species Eupatorium plicatum Urb. accepted as Koanophyllon tinctorium Arruda
- Species Eupatorium plucheoides Griseb. accepted as Grisebachianthus plucheoides (Griseb.) R.M.King & H.Rob.
- Species Eupatorium plumeri Urb. & Ekman accepted as Osmiopsis plumeri (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium pluriseriatum B.L.Rob. accepted as Urbananthus pluriseriatus (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium podachaenium Sch.Bip. ex Baker accepted as Campuloclinium purpurascens (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium poeppigii Spreng. accepted as Koanophyllon villosum (Sw.) R.M.King & H.Rob.
- Species Eupatorium polanthum Klatt accepted as Ageratina anisochroma (Klatt) R.M.King & H.Rob.
- Species Eupatorium polopolense B.L.Rob. accepted as Fleischmannia polopolensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium polyanthemum Wall. accepted as Acilepis divergens (Roxb.) H.Rob. & Skvarla
- Species Eupatorium polyanthes Less. ex Baker accepted as Mikania callineura Sch.Bip. ex Baker
- Species Eupatorium polyanthes Spreng. accepted as Vernonia polyanthes (Spreng.) Less.
- Species Eupatorium polyanthum Wall. accepted as Vernonia divergens (DC.) Edgew.
- Species Eupatorium polyanthum Sch.Bip. ex Baker accepted as Chromolaena ivifolia (L.) R.M.King & H.Rob.
- Species Eupatorium polybotryum DC. accepted as Decachaeta ovatifolia (DC.) R.M.King & H.Rob.
- Species Eupatorium polycephalum Sch.Bip. ex Baker accepted as Stomatanthes polycephalus (Sch.Bip. ex B.L.Rob.) H.Rob.
- Species Eupatorium polycephalum Sch.Bip. ex B.L.Rob. accepted as Stomatanthes polycephalus (Sch.Bip. ex B.L.Rob.) H.Rob.
- Species Eupatorium polycladum Dusén
- Species Eupatorium polycladum Dusén ex Malme accepted as Hatschbachiella polyclada (Dusén ex Malme) R.M.King & H.Rob.
- Species Eupatorium polyneuron (F.J. Herm.) Wunderlin
- Species Eupatorium polyodon Urb. accepted as Koanophyllon polyodon (Urb.) R.M.King & H.Rob.
- Species Eupatorium polystachyum DC. accepted as Symphyopappus compressus (Gardner) B.L.Rob.
- Species Eupatorium polystachyum Willd. ex Less. accepted as Vernonia canescens Kunth
- Species Eupatorium polystictum Urb. accepted as Koanophyllon polystictum (Urb.) R.M.King & H.Rob.
- Species Eupatorium polytryum DC.
- Species Eupatorium pomaderrifolium Benth. accepted as Ageratina asclepiadea (L.f.) R.M.King & H.Rob.
- Species Eupatorium ponticum Pall. ex Georgi accepted as Eupatorium cannabinum L.
- Species Eupatorium popayanense Hieron. accepted as Ageratina popayanensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium popocatapetlense Schlecht. ex Hemsley accepted as Ageratina ligustrina (DC.) R.M.King & H.Rob.
- Species Eupatorium popocatapetlense Schltdl. ex Hemsl. accepted as Ageratina ligustrina (DC.) R.M.King & H.Rob.
- Species Eupatorium populifolium Mart. accepted as Hebeclinium macrophyllum (L.) DC.
- Species Eupatorium populifolium Hook. & Arn. accepted as Urolepis hecatantha (DC.) R.M.King & H.Rob.
- Species Eupatorium populifolium Kunth accepted as Critonia morifolia (Mill.) R.M.King & H.Rob.
- Species Eupatorium porophylloides B.L.Rob. accepted as Chromolaena porophylloides (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium porphyranthemum A.Gray accepted as Fleischmannia porphyranthema (A.Gray) R.M.King & H.Rob.
- Species Eupatorium porphyrocladum Urb. & Ekman accepted as Koanophyllon porphyrocladum (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium porphyrolepis Baker accepted as Chromolaena porphyrolepis (Baker) R.M.King & H.Rob.
- Species Eupatorium porriginosum B.L.Rob. accepted as Ageratina porriginosa (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium portoricense Urb. accepted as Critonia portoricensis (Urb.) Britton & P.Wilson
- Species Eupatorium poterioides Sch.Bip. accepted as Sphaereupatorium scandens (Gardner) R.M.King & H.Rob.
- Species Eupatorium praefictum B.L.Rob. accepted as Disynaphia praeficta (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium prasiifolium (DC.) Griseb.
- Species Eupatorium pratense Klatt accepted as Fleischmannia pratensis (Klatt) R.M.King & H.Rob.
- Species Eupatorium pratense Klatt ex T.Durand & Pitt. accepted as Fleischmannia diversifolia (Schrad.) H.Rob.
- Species Eupatorium pringlei B.L.Rob. & Greenm. accepted as Ageratina pringlei (B.L.Rob. & Greenm.) R.M.King & H.Rob.
- Species Eupatorium prinodes B.L.Rob. accepted as Koanophyllon prinodes (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium prionobium B.L.Rob. accepted as Ageratina prionobia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium prionophyllum B.L.Rob. accepted as Bartlettina prionophylla (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium probum N.E.Br. accepted as Ageratina proba (N.E.Br.) R.M.King & H.Rob.
- Species Eupatorium probun N.E.Br.
- Species Eupatorium procerum B.L.Rob. accepted as Badilloa procera (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium propinquum DC. accepted as Chromolaena laevigata (Lam.) R.M.King & H.Rob.
- Species Eupatorium prunellaefolium Kunth accepted as Ageratina prunellaefolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium prunellifolium Kunth accepted as Ageratina prunellifolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium prunifolium Kunth accepted as Ageratina prunifolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium pseudarboreum Hieron. accepted as Aristeguietia pseudarborea (Hieron.) R.M.King & H.Rob.
- Species Eupatorium pseudochilca Benth. accepted as Ageratina pseudochilca (Benth.) R.M.King & H.Rob.
- Species Eupatorium pseudodalea (DC.) M.Gómez & Molinet accepted as Critonia pseudodalea DC.
- Species Eupatorium pseudo-dalea (DC.) Gomez & Molt. accepted as Critonia pseudodalea DC.
- Species Eupatorium pseudofastigiatum Hieron. accepted as Ageratina fastigiata (Kunth) R.M.King & H.Rob.
- Species Eupatorium pseudoglomeratum Hieron. accepted as Asplundianthus pseudoglomeratus (Hieron. ex Sodiro) R.M.King & H.Rob.
- Species Eupatorium pseudoglomeratum Hieron. ex Sodiro accepted as Asplundianthus pseudoglomeratus (Hieron. ex Sodiro) R.M.King & H.Rob.
- Species Eupatorium pseudohirsutum Hieron. accepted as Ageratina liebmannii (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium pseudolaeve Soar.Nunes accepted as Santosia talmonii R.M.King & H.Rob.
- Species Eupatorium pseudoperfoliatum Sch.Bip. accepted as Koanophyllon pseudoperfoliatum (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium pseudoperfoliatum Sch.Bip. ex Klatt accepted as Koanophyllon pseudoperfoliatum (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium pseudoprasiifolium Hassl. accepted as Chacoa pseudoprasiifolia (Hassl.) R.M.King & H.Rob.
- Species Eupatorium pseudopraxelis Hieron. accepted as Praxelis asperulacea (Baker) R.M.King & H.Rob.
- Species Eupatorium pseudoriganoides Hieron. ex Sodiro accepted as Cronquistianthus pseudoriganoides (Hieron.) R.M.King & H.Rob.
- Species Eupatorium pseudoriganoides Hieron. accepted as Cronquistianthus pseudoriganoides (Hieron.) R.M.King & H.Rob.
- Species Eupatorium psiadiaefolium DC. accepted as Chromolaena laevigata (Lam.) R.M.King & H.Rob.
- Species Eupatorium psiadiifolium DC. accepted as Chromolaena laevigata (Lam.) R.M.King & H.Rob.
- Species Eupatorium psilodorum B.L.Rob. accepted as Ageratina psilodora (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium psoraleum B.L.Rob. accepted as Neomirandea psoralea (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium ptaretepuiense V.M.Badillo accepted as Ageratina pichinchensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium pteropodum Hieron. accepted as Polyanthina nemorosa (Klatt) R.M.King & H.Rob.
- Species Eupatorium puberulum (Lam) DC. accepted as Koanophyllon puberulum (DC.) R.M.King & H.Rob.
- Species Eupatorium pubescens Muhl. ex Willd. accepted as Eupatorium rotundifolium var. ovatum (Bigelow) Torr.
- Species Eupatorium pubescens Wall. ex DC. accepted as Carpesium glossophyllum Maxim.
- Species Eupatorium pulchellum Kunth accepted as Chromolaena pulchella (Kunth) R.M.King & H.Rob.
- Species Eupatorium pulcheloides accepted as Grisebachianthus plucheoides (Griseb.) R.M.King & H.Rob.
- Species Eupatorium pulchrum Gardner accepted as Chromolaena stachyophylla (Spreng.) R.M.King & H.Rob.
- Species Eupatorium pumilum Wender
- Species Eupatorium pumilum Wender. ex Steud.
- Species Eupatorium pumilum Wender.
- Species Eupatorium pumilum (Gardner) B.L.Rob. accepted as Heterocondylus pumilus (Gardner) R.M.King & H.Rob.
- Species Eupatorium punctatum Lam. accepted as Chromolaena mononeura (Urb.) R.M.King & H.Rob.
- Species Eupatorium punctatum Willd. accepted as Eupatorium dubium Willd. ex Poiret
- Species Eupatorium punctatum Mill. accepted as Porophyllum punctatum (Mill.) S.F.Blake
- Species Eupatorium punctulatum DC. accepted as Chromolaena punctulata (DC.) R.M.King & H.Rob.
- Species Eupatorium punduanum Wall.
- Species Eupatorium punduanum Wall. ex DC. accepted as Eupatorium cannabinum L.
- Species Eupatorium pungens Gardner accepted as Chromolaena pungens (Gardner) R.M.King & H.Rob.
- Species Eupatorium purpurascens Sch.Bip.
- Species Eupatorium purpurascens Sch.Bip. ex Baker accepted as Campuloclinium purpurascens (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium purpureum L.
- Species Eupatorium purpureum Michx.
- Species Eupatorium purpureum Lour. accepted as Eupatorium quaternum DC.
- Species Eupatorium purpusi Brandegee accepted as Fleischmannia purpusii R.M.King & H.Rob.
- Species Eupatorium purpusii Brandegee
- Species Eupatorium pycnocephaloides B.L.Rob. accepted as Fleischmannia pycnocephaloides (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium pycnocephalum J.M.Coult.
- Species Eupatorium pycnocephalum Less. accepted as Fleischmannia pycnocephala (Less.) R.M.King & H.Rob.
- Species Eupatorium pyramidale D.Don accepted as Vernonia aspera (Roxb.) Buch.-Ham.
- Species Eupatorium pyramidale Klatt accepted as Ayapana stenolepis (Steetz) R.M.King & H.Rob.
- Species Eupatorium pyrifolium DC. accepted as Steyermarkina pyrifolia (DC.) R.M.King & H.Rob.
- Species Eupatorium quadrangulare DC. accepted as Critonia quadrangularis (DC.) R.M.King & H.Rob.
- Species Eupatorium quadriflorum Larrañaga
- Species Eupatorium quadriflorum Larran.
- Species Eupatorium quasitripartitum Hayata accepted as Eupatorium formosanum Hayata
- Species Eupatorium quaternum DC.
- Species Eupatorium quercetorum L.O.Williams accepted as Chromolaena quercetorum (L.O.Williams) R.M.King & H.Rob.
- Species Eupatorium quinqueflorum Urb. & Ekman accepted as Eupatorium mohrii Greene
- Species Eupatorium quinquesetosum Hemsley accepted as Fleischmannia arguta (Kunth) B.L.Rob.
- Species Eupatorium quinquesetosum Hemsl. accepted as Fleischmannia arguta (Kunth) B.L.Rob.
- Species Eupatorium quinquesetum Benth. accepted as Fleischmannia arguta (Kunth) B.L.Rob.
- Species Eupatorium quinquesetum Benth. ex Oersted accepted as Fleischmannia arguta (Kunth) B.L.Rob.
- Species Eupatorium quinquesetum Benth. ex Oerst. accepted as Fleischmannia arguta (Kunth) B.L.Rob.
- Species Eupatorium quintuplinerve Less. ex Baker accepted as Mikania trinervis Hook. & Arn.
- Species Eupatorium quisqueyanum Alain accepted as Koanophyllon quisqueyanum (Alain) R.M.King & H.Rob.
- Species Eupatorium racemosum Bertol. accepted as Eupatorium compositifolium Walter
- Species Eupatorium racemosum Sch.Bip. ex Baker accepted as Stomatanthes polycephalus (Sch.Bip. ex B.L.Rob.) H.Rob.
- Species Eupatorium radula Chodat accepted as Disynaphia radula (Chodat) R.M.King & H.Rob.
- Species Eupatorium rafaelense Coulter accepted as Ageratina mairetiana (DC.) R.M.King & H.Rob.
- Species Eupatorium rafaelense J.M.Coult. accepted as Ageratina mairetiana var. mairetiana (DC.) R.M.King & H.Rob.
- Species Eupatorium raffillii Hemsley accepted as Bartlettina sordida (Less.) R.M.King & H.Rob.
- Species Eupatorium raffillii Hemsl. accepted as Bartlettina sordida (Less.) R.M.King & H.Rob.
- Species Eupatorium ramboi Cabrera accepted as Barrosoa ramboi (Cabrera) R.M.King & H.Rob.
- Species Eupatorium ramireziorum J.Espinosa accepted as Ageratina ramireziorum (J.Espinosa) B.L.Turner
- Species Eupatorium ramonense B.L.Rob. accepted as Ageratina ramonensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium ramosissimum Gardner accepted as Austroeupatorium inulaefolium (Kunth) R.M.King & H.Rob.
- Species Eupatorium ramosum Mill. accepted as Eupatorium altissimum L.
- Species Eupatorium ranunculifolium (Rich. ex Sagra) M.Gómez accepted as Mikania ranunculifolia Rich. ex Sagra
- Species Eupatorium rapunculoides (DC.) B.L.Rob. accepted as Steviopsis rapunculoides (DC.) R.M.King & H.Rob.
- Species Eupatorium ravenii (R.M.King & H.Rob.) B.L.Turner accepted as Koanophyllon ravenii R.M.King & H.Rob.
- Species Eupatorium rebaudianum Bertoni accepted as Stevia rebaudiana (Bertoni) Bertoni
- Species Eupatorium recreense Hieron. accepted as Hebeclinium obtusisquamosum R.M.King & H.Rob.
- Species Eupatorium recurvans Small accepted as Eupatorium mohrii Greene
- Species Eupatorium reevesii Wall.
- Species Eupatorium reevesii Wall. ex DC. accepted as Eupatorium squamosum D.Don
- Species Eupatorium reflexum Moench accepted as Vernonia patula (Dryand.) Merr.
- Species Eupatorium regnellii Sch.Bip. accepted as Dasycondylus regnellii R.M.King & H.Rob.
- Species Eupatorium reitzii Cabrera accepted as Symphyopappus reitzii (Cabrera) R.M.King & H.Rob.
- Species Eupatorium remotifolium DC. accepted as Fleischmannia remotifolia (DC.) R.M.King & H.Rob.
- Species Eupatorium remyanum Philippi accepted as Ageratina glechonophylla (Less.) R.M.King & H.Rob.
- Species Eupatorium remyanum Phil. accepted as Ageratina glechonophylla (Less.) R.M.King & H.Rob.
- Species Eupatorium repandum Willd. accepted as Chromolaena corymbosa (Aubl.) R.M.King & H.Rob.
- Species Eupatorium resinifluum Urb. accepted as Ageratina resiniflua (Urb.) R.M.King & H.Rob.
- Species Eupatorium resinosum Torr. ex DC.
- Species Eupatorium resinosum Torr.
- Species Eupatorium resinosum accepted as Chromolaena laevigata (Lam.) R.M.King & H.Rob.
- Species Eupatorium reticulatum Desv. ex Ham.
- Species Eupatorium reticulatum Desv.
- Species Eupatorium reticulatum A.Rich. accepted as Grisebachianthus libanotica (Sch.Bip.) R.M.King & H.Rob.
- Species Eupatorium reticulatum Hook. & Arn. accepted as Aristeguietia salvia (Colla) R.M.King & H.Rob.
- Species Eupatorium reticuliferum Standl. & L.O.Williams accepted as Ageratina reticulifera (Standl. & L.O.Williams) R.M.King & H.Rob.
- Species Eupatorium reticulosum (C.Wright ex C.Wright) Molinet & M.Gómez accepted as Mikania reticulosa C.Wright ex C.Wright
- Species Eupatorium retifolium Sch.Bip. accepted as Mikania sessilifolia DC.
- Species Eupatorium retrofractum Thunb. accepted as Pegolettia retrofracta (Thunb.) Kies
- Species Eupatorium reversum Urb. accepted as Koanophyllon reversum (Urb.) R.M.King & H.Rob.
- Species Eupatorium revolutum Pohl ex Baker accepted as Ayapana stenolepis (Steetz) R.M.King & H.Rob.
- Species Eupatorium revolutum Gardner accepted as Chromolaena revoluta (Gardner) R.M.King & H.Rob.
- Species Eupatorium reyrobinsonii (B.L.Turner) B.L.Turner accepted as Koanophyllon longifolia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium rhexioides B.L.Rob. accepted as Koanophyllon rhexioides (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium rhinanthaceum DC. accepted as Chromolaena rhinanthacea (DC.) R.M.King & H.Rob.
- Species Eupatorium rhodanthum Sch.Bip. ex Baker accepted as Ayapana amygdalina (Lam.) R.M.King & H.Rob.
- Species Eupatorium rhodochlamydeum A.Gray accepted as Peteravenia malvaefolia (DC.) R.M.King & H.Rob.
- Species Eupatorium rhodolaenum Hieron. accepted as Austrobrickellia patens (D.Don ex Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium rhodolepis Chodat accepted as Chromolaena verbenacea (DC.) R.M.King & H.Rob.
- Species Eupatorium rhodopappum B.L.Rob. accepted as Ageratina rhodopappa (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium rhodopodum B.L.Rob. accepted as Ageratina rhodopoda (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium rhodotephrum B.L.Rob. accepted as Fleischmannia rhodotephra (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium rhodotrichum Dusén
- Species Eupatorium rhodotrichum Dusén ex Malme accepted as Trichogonia rhodotricha Malme
- Species Eupatorium rhomboideum Kunth accepted as Ageratina rhomboidea (Kunth) R.M.King & H.Rob.
- Species Eupatorium rhypodes B.L.Rob. accepted as Ageratina rhypodes (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium rhytidodes B.L.Rob. accepted as Ageratina rhytidodes (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium richardsonii (B.L.Turner) B.L.Turner accepted as Koanophyllon gracilicaule (Sch.Bip. ex B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium riedelianum Gardner accepted as Ophryosporus freyreysii (Thunb.) Baker
- Species Eupatorium riedelii Baker accepted as Campuloclinium riedelii (Baker) R.M.King & H.Rob.
- Species Eupatorium rigidulum Miq. accepted as Pertya rigidula (Miq.) Makino
- Species Eupatorium rigidum Wall. accepted as Vernonia teres Wall. ex DC.
- Species Eupatorium rigidum Benth. accepted as Brickellia paniculata (Mill.) B.L.Rob.
- Species Eupatorium rigidum Sw. accepted as Chromolaena rigida (Sw.) R.M.King & H.Rob.
- Species Eupatorium rimbachii B.L.Rob. accepted as Grosvenoria rimbachii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium riparium Sch.Bip. ex Schnittsp.
- Species Eupatorium riparium Regel accepted as Ageratina riparia (Regel) R.M.King & H.Rob.
- Species Eupatorium rivale Greenm. accepted as Ageratina rivalis (Greenm.) R.M.King & H.Rob.
- Species Eupatorium rivulorum B.L.Rob. accepted as Fleischmannia rivulorum (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium roanense Small accepted as Ageratina altissima (L.) R.M.King & H.Rob.
- Species Eupatorium robinsonianum Greene accepted as Ageratina espinosarum (A.Gray) R.M.King & H.Rob.
- Species Eupatorium robustum Glaz. accepted as Brasilia sickii G.M.Barroso
- Species Eupatorium rojasianum Standl. & Steyerm. accepted as Fleischmannia pleurocephala (Less.) R.M.King & H.Rob.
- Species Eupatorium rojasii Hassl. accepted as Chromolaena rojasii (Hassl.) R.M.King & H.Rob.
- Species Eupatorium roraimense N.E.Br. accepted as Ageratina roraimensis (N.E.Br.) R.M.King & H.Rob.
- Species Eupatorium rorulentum B.L.Rob. accepted as Ageratina elegans (Kunth) R.M.King & H.Rob.
- Species Eupatorium rosalesia DC. accepted as Brickellia glandulosa (La Llave) McVaugh
- Species Eupatorium rosei (R.M.King & H.Rob.) B.L.Turner accepted as Cronquistianthus rosei R.M.King & H.Rob.
- Species Eupatorium rosengurttii Cabrera
- Species Eupatorium roseorum B.L.Rob. accepted as Chromolaena roseorum (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium roseum Klatt ex T.Durand & Pitt. accepted as Fleischmannia pratensis (Klatt) R.M.King & H.Rob.
- Species Eupatorium roseum Gardner accepted as Austrocritonia rosea (Gardner) R.M.King & H.Rob.
- Species Eupatorium roseum Klatt accepted as Fleischmannia pratensis (Klatt) R.M.King & H.Rob.
- Species Eupatorium rosmannifolium Labill. accepted as Helichrysum rosmarinifolium (Labill.) Less.
- Species Eupatorium rosmarinaceum Cabrera
- Species Eupatorium rosmarinaceum Cabrera & Vittet accepted as Austroeupatorium rosmarinaceum (Cabrera & Vittet) R.M.King & H.Rob.
- Species Eupatorium rosmarinifolium Sch.Bip. ex Baker accepted as Austroeupatorium rosmarinaceum (Cabrera & Vittet) R.M.King & H.Rob.
- Species Eupatorium rosmarinifolium Sessé & Moc. accepted as Brickellia scoparia (DC.) A.Gray
- Species Eupatorium rosmarinifolium Labill. accepted as Ozothamnus rosmarinifolius (Labill.) Sweet
- Species Eupatorium rostellatum Nieuwl.
- Species Eupatorium rothrockii A.Gray accepted as Ageratina rothrockii (A.Gray) R.M.King & H.Rob.
- Species Eupatorium rotundifolium L.
- Species Eupatorium rotundifolium Fernald accepted as Eupatorium rotundifolium L.
- Species Eupatorium roupalifolium B.L.Rob. accepted as Guayania roupalifolia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium ruae Standl. accepted as Bartlettina pansamalensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium rubricaule Kunth accepted as Ageratina rubricaulis (Kunth) R.M.King & H.Rob.
- Species Eupatorium rubroviolaceum Urb. & Ekman accepted as Koanophyllon rubroviolaceum (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium ruckeri B.L.Rob.
- Species Eupatorium rufescens Lund ex DC. accepted as Kaunia rufescens (Lund ex DC.) R.M.King & H.Rob.
- Species Eupatorium rufidulum Hook. & Arn.
- Species Eupatorium rufum Spreng. ex DC. accepted as Vernonia extensa (Wall.) Wall. ex DC.
- Species Eupatorium rugosum Houtt. accepted as Ageratina altissima (L.) R.M.King & H.Rob.
- Species Eupatorium rugosum Kunth accepted as Cronquistianthus bulliferus (S.F.Blake) R.M.King & H.Rob.
- Species Eupatorium rugosum Spreng. accepted as Eupatorium sprengelianum DC.
- Species Eupatorium rugosum Schrad. ex DC. accepted as Ageratina liebmannii (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium rupestre Raf. accepted as Eupatorium altissimum L.
- Species Eupatorium rupestre Gardner accepted as Gymnocondylus galeopsifolius (Gardner) R.M.King & H.Rob.
- Species Eupatorium rupicola B.L.Rob. & Greenm. accepted as Ageratina rupicola (B.L.Rob. & Greenm.) R.M.King & H.Rob.
- Species Eupatorium rusbyi Britton accepted as Polyanthina nemorosa (Klatt) R.M.King & H.Rob.
- Species Eupatorium rydbergii Britton accepted as Eupatorium maculatum L.
- Species Eupatorium rzedowskii (B.L.Turner) B.L.Turner accepted as Koanophyllon rzedowskii B.L.Turner
- Species Eupatorium sabeanum Buckley accepted as Chromolaena odorata (L.) R.M.King & H.Rob.
- Species Eupatorium sachalinense (F.Schmidt) Makino accepted as Eupatorium chinense L.
- Variety Eupatorium sachalinense var. oppositifolium Koidz. accepted as Eupatorium makinoi var. oppositifolium (Koidz.) T.Kawahara & Yahara
- Variety Eupatorium sachalinense var. sachalinense accepted as Eupatorium sachalinense (F.Schmidt) Makino
- Forma Eupatorium sachalinense f. aureoreticulatum Makino accepted as Eupatorium chinense L.
- Forma Eupatorium sachalinense f. sachalinense accepted as Eupatorium sachalinense (F.Schmidt) Makino
- Species Eupatorium sadidum Less.
- Species Eupatorium sagittatum A.Gray accepted as Chromolaena sagittata (A.Gray) R.M.King & H.Rob.
- Species Eupatorium sagittiferum B.L.Rob. accepted as Chromolaena sagittifera (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium salicinum Spreng. accepted as Lepidaploa sprengeliana (Sch.Bip.) H.Rob.
- Species Eupatorium salicinum Lam. accepted as Badilloa salicina (Lam.) R.M.King & H.Rob.
- Species Eupatorium salinum Standl. & Steyerm. accepted as Ageratina prunellaefolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium salitarii Sch.Bip. accepted as Ageratina prunellifolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium saltense Hieron. accepted as Kaunia saltensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium saltillense B.L.Rob. accepted as Ageratina saltillensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium saltivarii Sch.Bip.
- Species Eupatorium saltivarii Sch.Bip. ex B.L.Rob. & Seaton accepted as Ageratina prunellaefolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium saltuense Fernald accepted as Eupatorium altissimum L.
- Species Eupatorium saluberrimum Larran.
- Species Eupatorium saluberrimum Larrañaga
- Species Eupatorium salvia Colla accepted as Aristeguietia salvia (Colla) R.M.King & H.Rob.
- Species Eupatorium salviaefolium Sims accepted as Eupatorium perfoliatum L.
- Species Eupatorium salviaefolium Kunth accepted as Aristeguietia dielsii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium salvifolium Spreng. accepted as Aristeguietia dielsii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium salviifolium Spreng.
- Species Eupatorium salviifolium Sims accepted as Eupatorium perfoliatum L.
- Species Eupatorium salviifolium Kunth accepted as Aristeguietia dielsii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium salzmannianum DC. accepted as Ayapana amygdalina (Lam.) R.M.King & H.Rob.
- Species Eupatorium sambucifolium Elmer
- Species Eupatorium sampaionis w.herter ex A.Samp.
- Species Eupatorium sampaionis Herter
- Species Eupatorium sampaionis Herter ex Samp.
- Species Eupatorium sanctopaulense B.L.Rob. accepted as Chromolaena sanctopaulensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium santacruzense Hieron. accepted as Lorentzianthus viscidus (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium santanense Aristeg. accepted as Chromolaena santanensis (Aristeg.) R.M.King & H.Rob.
- Species Eupatorium sartorii Sch.Bip. ex Klatt accepted as Critonia morifolia (Mill.) R.M.King & H.Rob.
- Species Eupatorium satureiaefolium (Lam.) Lam. accepted as Stevia satureifolia (Lam.) Lam.
- Species Eupatorium satureiifolium (Lam.) Lam. accepted as Stevia satureiifolia (Lam.)
- Species Eupatorium saucechicoense Hieron. accepted as Acanthostyles saucechicoensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium saxatile Larran.
- Species Eupatorium saxatile Larrañaga
- Species Eupatorium saxorum Standl. & Steyerm. accepted as Fleischmannia saxorum (Standl. & Steyerm.) R.M.King & H.Rob.
- Species Eupatorium scaberrimum Walp. accepted as Chromolaena stachyophylla (Spreng.) R.M.King & H.Rob.
- Species Eupatorium scabrellum B.L.Rob. accepted as Decachaeta scabrella (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium scabridum Ellis accepted as Eupatorium rotundifolium L.
- Species Eupatorium scabridum Elliott accepted as Eupatorium rotundifolium var. scabridum (Elliott) A.Gray
- Species Eupatorium scabrifolium B.L.Rob. accepted as Asplundianthus scabrifolius (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium scabriusculum Urb. & Ekman accepted as Koanophyllon scabriusculum (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium scabrum L. f accepted as Chromolaena scabra (L.f.) R.M.King & H.Rob.
- Species Eupatorium scabrum L.f. accepted as Chromolaena scabra (L.f.) R.M.King & H.Rob.
- Species Eupatorium scandens Link accepted as Senecio deltoideus Less.
- Species Eupatorium scandens Thunb. accepted as Mikania capensis DC.
- Species Eupatorium scandens L. accepted as Mikania scandens (L.) Willd.
- Species Eupatorium scandens Hook. & Arn. accepted as Mikania lagoensis Baker
- Species Eupatorium scariosum Wallr. ex DC. accepted as Brickellia pendula (Schrad.) A.Gray
- Species Eupatorium schaffneri Sch.Bip. ex Hemsl.
- Species Eupatorium schaffneri Sch.Bip. ex B.L.Rob. accepted as Ageratina schaffneri (Sch.Bip. ex B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium schaffneri Sch.Bip. ex Hemsley accepted as Ageratina schaffneri (Sch.Bip. ex B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium schickendantzii Hieron. accepted as Fleischmannia schickendantzii (Hieron.) R.M.King & H.Rob.
- Species Eupatorium schiedeanoides Sch.Bip. ex A.Gray accepted as Fleischmannia pycnocephala (Less.) R.M.King & H.Rob.
- Species Eupatorium schiedeanum Schrad. accepted as Fleischmannia pratensis (Klatt) R.M.King & H.Rob.
- Species Eupatorium schimperianum Scheele
- Species Eupatorium schininii Cabrera
- Species Eupatorium schizanthum Griseb.
- Species Eupatorium schlechtendalii DC. accepted as Dasycondylus resinosus (Spreng.) R.M.King & H.Rob.
- Species Eupatorium schomburgkii Benth. accepted as Baccharis oblongifolia (Ruiz & Pav.) Pers.
- Species Eupatorium schraderi DC. accepted as Ageratina liebmannii (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium schultzii Sch.Bip. accepted as Peteravenia schultzii (Schnittsp.) R.M.King & H.Rob.
- Species Eupatorium schultzii Schnittsp. accepted as Peteravenia schultzii (Schnittsp.) R.M.King & H.Rob.
- Species Eupatorium sciaphilum B.L.Rob. accepted as Neomirandea sciaphila (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium sciatraphes B.L.Rob. accepted as Koanophyllon sciatraphes (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium scoparioides L.O.Williams accepted as Koanophyllon solidaginoides (Kunth) R.M.King & H.Rob.
- Species Eupatorium scopulorum Wedd. accepted as Ageratina scopulorum (Wedd.) R.M.King & H.Rob.
- Species Eupatorium scorodonioides A.Gray accepted as Ageratina scorodonioides (A.Gray) R.M.King & H.Rob.
- Species Eupatorium secundiflorum Bertero ex DC. accepted as Vernonia arborescens (L.) Sw.
- Species Eupatorium secundiflorum Lag. accepted as Brickellia secundiflora (Lag.) A.Gray
- Species Eupatorium selerianum B.L.Rob. accepted as Fleischmannia seleriana (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium selleanum Urb. accepted as Koanophyllon selleanum (Urb.) R.M.King & H.Rob.
- Species Eupatorium selloi Baker
- Species Eupatorium semialatum Benth. accepted as Ageratina ligustrina (DC.) R.M.King & H.Rob.
- Species Eupatorium semiamplexifolium G.S.S.Almeida & Carv.-Okano
- Species Eupatorium semicrenatum Urb. accepted as Koanophyllon semicrenatum (Urb.) R.M.King & H.Rob.
- Species Eupatorium semiserratum DC.
- Species Eupatorium semistriatum Baker accepted as Bejaranoa semistriata (Baker) R.M.King & H.Rob.
- Species Eupatorium senecionideum Baker accepted as Disynaphia senecionidea (Baker) R.M.King & H.Rob.
- Species Eupatorium septuplinervium Klatt accepted as Bartlettina sordida (Less.) R.M.King & H.Rob.
- Species Eupatorium sericeum Kunth accepted as Hebeclinium sericeum (Kunth) R.M.King & H.Rob.
- Species Eupatorium serotinum Michx.
- Species Eupatorium serratifolium (Kunth) DC. accepted as Ophryosporus serratifolius (Kunth) B.L.Rob.
- Species Eupatorium serratuloides Kunth accepted as Chromolaena serratuloides (Kunth) R.M.King & H.Rob.
- Species Eupatorium serratum Spreng. accepted as Grazielia serrata (Spreng.) R.M.King & H.Rob.
- Species Eupatorium serrulatum DC. accepted as Neocabreria serrulata (DC.) R.M.King & H.Rob.
- Species Eupatorium sessile Sessé & Moc. accepted as Vernonia sericea Rich.
- Species Eupatorium sessilifolium L.
- Species Eupatorium setiferum Pav. ex A.Gray accepted as Barroetea pavonii A.Gray
- Species Eupatorium sexangulare (Klatt) B.L.Rob. accepted as Critonia sexangularis (Klatt) R.M.King & H.Rob.
- Species Eupatorium sexcostatum E.H.L.Krause
- Species Eupatorium sexcostatum E. H. Krause
- Species Eupatorium shaferi B.L.Rob. accepted as Spaniopappus shaferi (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium shastense D.W.Taylor & Stebbins accepted as Ageratina shastensis (D.W.Taylor & Stebbins) R.M.King & H.Rob.
- Species Eupatorium shastense Taylor & Stebb. accepted as Ageratina shastensis (D.W.Taylor & Stebbins) R.M.King & H.Rob.
- Species Eupatorium shimadai Kitam.
- Species Eupatorium sideritidis Benth. ex Oersted accepted as Fleischmannia sideritides (Benth. ex Benth.) R.M.King & H.Rob.
- Species Eupatorium sideritidis Benth. ex Oerst. accepted as Fleischmannia sideritides (Benth. ex Benth.) R.M.King & H.Rob.
- Species Eupatorium sideritidis Benth. accepted as Fleischmannia sideritides (Benth. ex Benth.) R.M.King & H.Rob.
- Species Eupatorium sieberianum DC. accepted as Condylidium iresinoides (Kunth) R.M.King & H.Rob.
- Species Eupatorium silenifolium Mart. ex Baker accepted as Trichogonia campestris Gardner
- Species Eupatorium sillense Hieron. accepted as Ageratina ibaguensis (Sch.Bip. ex Hieron.) R.M.King & H.Rob.
- Species Eupatorium silphiifolium Marloth accepted as Austroeupatorium silphiifolium (Mart.) R.M.King & H.Rob.
- Species Eupatorium silphiifolium Mart. accepted as Austroeupatorium silphiifolium (Mart.) R.M.King & H.Rob.
- Species Eupatorium siltepecanum B.L.Turner accepted as Critonia siltepecana (B.L.Turner) R.M.King & H.Rob.
- Species Eupatorium silvaticum B.L.Rob. accepted as Koanophyllon silvaticum (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium silvicola B.L.Rob. accepted as Bartlettina silvicola (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium simile Proctor accepted as Koanophyllon simile (Proctor) R.M.King & H.Rob.
- Species Eupatorium simillimum B.L.Rob. accepted as Koanophyllon tinctorium Arruda
- Species Eupatorium simonsii C.B.Clarke accepted as Eupatorium cannabinum L.
- Species Eupatorium simulans B.L.Rob. accepted as Ageratina simulans (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium sinaloense B.L.Rob. accepted as Fleischmannia sinaloensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium sinclairii Benth. accepted as Fleischmannia sinclairii (Benth. ex Oerst.) R.M.King & H.Rob.
- Species Eupatorium sinclairii Benth. ex Oerst. accepted as Fleischmannia sinclairii (Benth. ex Oerst.) R.M.King & H.Rob.
- Species Eupatorium sinclairii Benth. ex Oersted accepted as Fleischmannia sinclairii (Benth. ex Oerst.) R.M.King & H.Rob.
- Species Eupatorium sinense J.F.Gmel. accepted as Eupatorium chinense L.
- Species Eupatorium sinuatum Lam. accepted as Chromolaena sinuata (Lam.) R.M.King & H.Rob.
- Species Eupatorium sinuatum Lour. accepted as Cyanthillium cinereum (L.) H.Rob.
- Species Eupatorium sipolisii N.E.Br.
- Species Eupatorium sitiense Hieron. accepted as Chromolaena squalida (DC.) R.M.King & H.Rob.
- Species Eupatorium skutchii B.L.Rob. accepted as Ageratina skutchii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium sladenianum S.Moore accepted as Campuloclinium macrocephalum (Less.) DC.
- Species Eupatorium smilacinum Kunth accepted as Asplundianthus smilacinus (Kunth) R.M.King & H.Rob.
- Species Eupatorium smilacinum H. B. K accepted as Asplundianthus smilacinus (Kunth) R.M.King & H.Rob.
- Species Eupatorium smithii Greene & C.Mohr accepted as Eupatorium pinnatifidum Elliott
- Species Eupatorium smithii B.L.Rob. accepted as Ageratina tomentella (Schrad.) R.M.King & H.Rob.
- Species Eupatorium sodali L.O.Williams accepted as Koanophyllon sorensenii R.M.King & H.Rob.
- Species Eupatorium sodiroi Hieron. ex Sodiro accepted as Ageratina sodiroi (Hieron.) R.M.King & H.Rob.
- Species Eupatorium sodiroi Hieron. accepted as Ageratina sodiroi (Hieron.) R.M.King & H.Rob.
- Species Eupatorium solanifolium Sessé & Moc. accepted as Vernonia morelana Gleason
- Species Eupatorium soleirolii Loisel. accepted as Eupatorium cannabinum L.
- Species Eupatorium solidaginifolium A.Gray accepted as Koanophyllon solidaginifolium (A.Gray) R.M.King & H.Rob.
- Species Eupatorium solidaginoides Kunth accepted as Koanophyllon solidaginoides (Kunth) R.M.King & H.Rob.
- Species Eupatorium sonderi Sch.Bip. accepted as Campovassouria cruciata (Vell.) R.M.King & H.Rob.
- Species Eupatorium sonorae A.Gray accepted as Fleischmannia sonorae (A.Gray) R.M.King & H.Rob.
- Species Eupatorium sophiaefolium L. accepted as Eupatorina sophiaefolia (L.) R.M.King & H.Rob.
- Species Eupatorium sophiifolium L. accepted as Eupatorina sophiifolia (L.) R.M.King & H.Rob.
- Species Eupatorium sophioides DC. accepted as Eupatorina sophiaefolia (L.) R.M.King & H.Rob.
- Species Eupatorium soratae Sch.Bip. accepted as Fleischmannia soratae (Sch.Bip. ex B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium soratae Sch.Bip. ex B.L.Rob. accepted as Fleischmannia soratae (Sch.Bip. ex B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium soratense Hieron. accepted as Ageratina sotarensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium soratoe Sch.Bip. ex B.L.Rob. accepted as Fleischmannia soratae (Sch.Bip. ex B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium sordescens DC. accepted as Dasycondylus resinosus (Spreng.) R.M.King & H.Rob.
- Species Eupatorium sordidum Less. accepted as Bartlettina sordida (Less.) R.M.King & H.Rob.
- Species Eupatorium sorensenii (R.M.King & H.Rob.) L.O.Williams accepted as Koanophyllon sorensenii R.M.King & H.Rob.
- Species Eupatorium sotarense Hieron. accepted as Ageratina sotarensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium sotorum C.Nelson accepted as Critonia sexangularis (Klatt) R.M.King & H.Rob.
- Species Eupatorium spathulatum Hook. & Arn. accepted as Disynaphia spathulata (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium speciosum Vent. accepted as Liatris elegans (Walter) Michx.
- Species Eupatorium spectabile (D.Don) Spreng. accepted as Gochnatia spectabilis (D.Don) Less.
- Species Eupatorium sphaerocephalum Sch.Bip. ex Baker accepted as Sphaereupatorium scandens (Gardner) R.M.King & H.Rob.
- Species Eupatorium sphaerocephalum Sch.Bip. accepted as Sphaereupatorium scandens (Gardner) R.M.King & H.Rob.
- Species Eupatorium sphagnophilum B.L.Rob. accepted as Badilloa sphagnophila (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium sphenopodum B.L.Rob. accepted as Flyriella sphenopoda (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium spicatum Lam. accepted as Baccharis spicata (Lam.) Baill.
- Species Eupatorium spinaciaefolium (DC.) A.Gray accepted as Critonia spinaciifolia (DC.) R.M.King & H.Rob.
- Species Eupatorium spinaciifolium A.Gray
- Species Eupatorium spiraeifolium Sch.Bip. ex O.Hoffm. accepted as Ageratina espinosarum (A.Gray) R.M.King & H.Rob.
- Species Eupatorium splendens Klotzsch ex Pol. accepted as Fleischmannia splendens R.M.King & H.Rob.
- Species Eupatorium sprengelianum DC.
- Species Eupatorium sprucei B.L.Rob. accepted as Ayapana elata (Steetz) R.M.King & H.Rob.
- Species Eupatorium squalidum DC. accepted as Chromolaena squalida (DC.) R.M.King & H.Rob.
- Species Eupatorium squamosum D.Don
- Species Eupatorium squarroso-ramosum Hieron. accepted as Chromolaena squarroso-ramosa (Hieron.) R.M.King & H.Rob.
- Species Eupatorium squarrosum Cav. accepted as Brickellia cavanillesii (Cass.) A.Gray
- Species Eupatorium squarrosum Sessé & Moc. accepted as Brickellia cavanillesii (Cass.) A.Gray
- Species Eupatorium squarrulosum Hook. & Arn. accepted as Chromolaena squarrulosa (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium squarrulosum Griseb. accepted as Chromolaena squarroso-ramosa (Hieron.) R.M.King & H.Rob.
- Species Eupatorium squiresii Rusby ex B.L.Rob. accepted as Ayapana trinitensis (Kuntze) R.M.King & H.Rob.
- Species Eupatorium squiresii Rusby accepted as Ayapana trinitensis (Kuntze) R.M.King & H.Rob.
- Species Eupatorium stachyophyllum Spreng. accepted as Chromolaena stachyophylla (Spreng.) R.M.King & H.Rob.
- Species Eupatorium standleyi B.L.Rob. accepted as Neomirandea standleyi (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium steelei E.E.Lamont accepted as Eutrochium steelei (E.E.Lamont) E.E.Lamont
- Species Eupatorium steetzii B.L.Rob.
- Species Eupatorium stenolepis Steetz accepted as Chromolaena hirsuta (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium sternbergianum DC. accepted as Ageratina sternbergiana (DC.) R.M.King & H.Rob.
- Species Eupatorium steviaefolium DC. accepted as Hatschbachiella tweedieana (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium steviifolium DC. accepted as Eupatorium tweedieanum var. tweedieanum
- Species Eupatorium stevioides Fenzl
- Species Eupatorium stevioides Steyerm. accepted as Ageratina jahnii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium steyermarkianum V.M.Badillo accepted as Chromolaena steyermarkiana (V.M.Badillo) R.M.King & H.Rob.
- Species Eupatorium stictophyllum B.L.Rob. accepted as Ageratina stictophylla (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium stigmaticum Urb. & Ekman accepted as Critonia stigmatica (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium stigmatosum Meyen & Walp. accepted as Chromolaena odorata (L.) R.M.King & H.Rob.
- Species Eupatorium stigmatosum Bertol. accepted as Eupatorium album L.
- Species Eupatorium stigmatosum Chodat accepted as Campuloclinium macrocephalum (Less.) DC.
- Species Eupatorium stillingiaefolium DC. accepted as Chromolaena stillingiaefolia (DC.) R.M.King & H.Rob.
- Species Eupatorium stillingiifolium DC.
- Species Eupatorium stipulaceum Vahl accepted as Mikania stipulacea (Vahl) Willd.
- Species Eupatorium stipuliferum Rusby accepted as Koanophyllon stipulifera (Rusby) R.M.King & H.Rob.
- Species Eupatorium stipuliferun Rusby accepted as Koanophyllon solidaginoides (Kunth) R.M.King & H.Rob.
- Species Eupatorium stoechadifolium L.f. accepted as Lourteigia stoechadifolia (L.f.) R.M.King & H.Rob.
- Species Eupatorium stoechadifolium L. f accepted as Lourteigia stoechadifolia (L.f.) R.M.King & H.Rob.
- Species Eupatorium stoechadosmum Hance accepted as Eupatorium fortunei Turcz.
- Species Eupatorium stramineum DC. accepted as Helogyne straminea (DC.) B.L.Rob.
- Species Eupatorium strictum A.Gray accepted as Ageratina stricta (A.Gray) R.M.King & H.Rob.
- Species Eupatorium strobilanthum Mart. ex Baker accepted as Chromolaena horminoides DC.
- Species Eupatorium stuebelii Hieron. accepted as Asplundianthus stuebelii (Hieron.) R.M.King & H.Rob.
- Species Eupatorium suaveolens Wall. accepted as Eupatorium cannabinum L.
- Species Eupatorium suaveolens Kunth accepted as Austroeupatorium inulaefolium (Kunth) R.M.King & H.Rob.
- Species Eupatorium suaveolens Chapm. accepted as Ageratina jucunda (Greene) Clewell & Wooten
- Species Eupatorium subalternifolium DC. accepted as Chromolaena stachyophylla (Spreng.) R.M.King & H.Rob.
- Species Eupatorium subcapitatum Malme accepted as Stomatanthes subcapitatus (Malme) H.Rob.
- Species Eupatorium subcordatum Benth.
- Species Eupatorium subcordatum Benth. ex Oerst. accepted as Ageratina subcordata (Benth. ex Oerst.) R.M.King & H.Rob.
- Species Eupatorium subcordatum Benth. ex Oersted accepted as Ageratina subcordata (Benth. ex Oerst.) R.M.King & H.Rob.
- Species Eupatorium subdentatum Gardner accepted as Koanophyllon adamantium (Gardner) R.M.King & H.Rob.
- Species Eupatorium subferrugineum B.L.Rob. accepted as Ageratina subferruginea (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium subglabratum (Hieron.) Cabrera & Vittet accepted as Praxelis kleinioides (Kunth) Sch.Bip.
- Species Eupatorium subhastatum Hook. & Arn. accepted as Badilloa steetzii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium subinclusum Klatt accepted as Ageratina subinclusa (Klatt) R.M.King & H.Rob.
- Species Eupatorium subintegerrimum Malme accepted as Malmeanthus subintegerrimus (Malme) R.M.King & H.Rob.
- Species Eupatorium subintegrum (Greene) B.L.Rob. accepted as Ageratina subintegra (Greene) R.M.King & H.Rob.
- Species Eupatorium subobtusum DC. accepted as Ayapana amygdalina (Lam.) R.M.King & H.Rob.
- Species Eupatorium subpenninervium Sch.Bip. ex Klatt accepted as Ageratina subinclusa (Klatt) R.M.King & H.Rob.
- Species Eupatorium subplumosum D.Don ex Hook. & Arn. accepted as Gyptis tanacetifolia (Gillies ex Hook. & Arn.) D.J.N.Hind & Flann
- Species Eupatorium subpurpureum Urb. & Ekman accepted as Koanophyllon subpurpureum (Urb. & Ekman) R.M.King & H.Rob.
- Species Eupatorium subscandens Hieron. accepted as Chromolaena subscandens (Hieron.) R.M.King & H.Rob.
- Species Eupatorium subserratum Gardner accepted as Chromolaena mucronata (Gardner) R.M.King & H.Rob.
- Species Eupatorium subtetragonum Miq. accepted as Eupatorium lindleyanum DC.
- Species Eupatorium subtriplinerve Sch.Bip. accepted as Kaunia rufescens (Lund ex DC.) R.M.King & H.Rob.
- Species Eupatorium subtruncatum Gardner
- Species Eupatorium subulatum Sessé & Moc.
- Species Eupatorium subuligerum A.Gray accepted as Barroetea subuligera A.Gray
- Species Eupatorium subvelutinum DC. accepted as Chromolaena squalida (DC.) R.M.King & H.Rob.
- Species Eupatorium subverticillatum Less. ex Baker accepted as Mikania subverticillata Sch.Bip. ex Baker
- Species Eupatorium succulentum Sol. ex Baker accepted as Barrosoa apiculata (Gardner) R.M.King & H.Rob.
- Species Eupatorium suffruticosum Sessé & Moc.
- Species Eupatorium sulcatum Hook. & Arn. accepted as Mikania sulcata (Hook. & Arn.) B.L.Rob.
- Species Eupatorium suratense B.L.Rob. accepted as Chromolaena suratensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium surinamense Sch.Bip. ex Miq. accepted as Ayapana amygdalina (Lam.) R.M.King & H.Rob.
- Species Eupatorium surutatoanum B.L.Turner accepted as Koanophyllon sinaloensis B.L.Turner
- Species Eupatorium symphyopappus Steyerm. accepted as Symphyopappus decussatus Turcz.
- Species Eupatorium syriacum Steven
- Species Eupatorium syriacum Jacq. accepted as Ayapana stenolepis (Steetz) R.M.King & H.Rob.
- Species Eupatorium syringaefolium Turcz. accepted as Koanophyllon solidaginoides (Kunth) R.M.King & H.Rob.
- Species Eupatorium syringifolium Turcz.
- Species Eupatorium tacaquirense (Hieron.) B.L.Rob. accepted as Helogyne tacaquirensis Hieron.
- Species Eupatorium tacotanum Klatt accepted as Chromolaena tacotana (Klatt) R.M.King & H.Rob.
- Species Eupatorium tacuarembense Hieron. & Arechav. ex Arechav.
- Species Eupatorium tacuarembense Hieron. & Arechav. accepted as Disynaphia tacuarembensis (Hieron. & Arechav.) R.M.King & H.Rob.
- Species Eupatorium tahonense Hieron. accepted as Aristeguietia tahonensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium tamaulipanum B.L.Turner accepted as Bartlettina tamaulipana (B.L.Turner) R.M.King & H.Rob.
- Species Eupatorium tamaulipasense (R.M.King & H.Rob.) B.L.Turner accepted as Viereckia tamaulipasensis R.M.King & H.Rob.
- Species Eupatorium tambillense Hieron. accepted as Ageratina tambillensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium tamboense Hieron. accepted as Fleischmannia tamboensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium tanacetifolium Gillies ex Hook. & Arn. accepted as Gyptis tanacetifolia (Gillies ex Hook. & Arn.) D.J.N.Hind & Flann
- Species Eupatorium tapeinanthum Urb. accepted as Koanophyllon tapeinanthum (Urb.) R.M.King & H.Rob.
- Species Eupatorium tarapotense B.L.Rob. accepted as Ayapanopsis tarapotensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium tarmense B.L.Rob. accepted as Ageratina tarmensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium tashiroi Hayata
- Species Eupatorium tatamense B.L.Rob. accepted as Aristeguietia tatamensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium tatei B.L.Rob. accepted as Koanophyllon tatei (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium tatei B.L.Rob. ex Gleason accepted as Koanophyllon tatei (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium taunayanum Glaz. ex B.L.Rob. accepted as Austrocritonia taunayana (Glaz. ex B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium tawadae Kitam.
- Species Eupatorium tectum Gardner accepted as Chromolaena tecta (Gardner) R.M.King & H.Rob.
- Species Eupatorium tenejapanum B.L.Turner accepted as Bartlettina breedlovei R.M.King & H.Rob.
- Species Eupatorium tenorae Aristeg. accepted as Bartlettina tenorae (Aristeg.) R.M.King & H.Rob.
- Species Eupatorium tenue R.E.Fr. accepted as Ageratina tenuis (R.E.Fr.) R.M.King & H.Rob.
- Species Eupatorium tenuicapitulatum Hieron. accepted as Chromolaena leptocephala (DC.) R.M.King & H.Rob.
- Species Eupatorium tenuiflorum (Griseb.) Hieron. accepted as Austrobrickellia arnottii (Baker) R.M.King & H.Rob.
- Species Eupatorium tenuifolium Kunth accepted as Critoniella tenuifolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium tenuifolium Rojas accepted as Praxelis kleinioides (Kunth) Sch.Bip.
- Species Eupatorium tepicanum (Hook. & Arn.) Hemsl. accepted as Critonia hebebotrya DC.
- Species Eupatorium tepuianum Steyerm. accepted as Guayania roupalifolia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium tequendamense Hieron.
- Species Eupatorium tequendamense Hieron. ex Sodiro accepted as Chromolaena subscandens (Hieron.) R.M.King & H.Rob.
- Species Eupatorium ternatum Sessé & Moc. accepted as Hofmeisteria urenifolia (Hook. & Arn.) Walp.
- Species Eupatorium ternifolium Elliot
- Species Eupatorium ternifolium Elliott accepted as Eupatorium dubium Willd. ex Poiret
- Species Eupatorium tetragonum SCHRADER accepted as Ageratina tetragona (Schrad.) R.M.King & H.Rob.
- Species Eupatorium tetragonum Schrad. accepted as Ageratina rubricaulis (Kunth) R.M.King & H.Rob.
- Species Eupatorium tetranthum Griseb. accepted as Koanophyllon tetranthum (Griseb.) R.M.King & H.Rob.
- Species Eupatorium tetranthum Sch.Bip. ex Baker accepted as Stomatanthes dentatus (Gardner) H.Rob.
- Species Eupatorium tetrastichum (B.L.Rob.) Steyerm. accepted as Goyazianthus tetrastichus (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium teucrifolium Willd. accepted as Eupatorium rotundifolium L.
- Species Eupatorium teucriifolium D.Don ex Hook. & Arn. accepted as Chromolaena hirsuta (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium teucriifolium (Spreng.) Herter accepted as Grazielia gaudichaudeana (DC.) R.M.King & H.Rob.
- Species Eupatorium teucrioides Hook. & Arn.
- Species Eupatorium teucrioides Hook. & Arn. ex Hieron. accepted as Chromolaena arnottiana (Griseb.) R.M.King & H.Rob.
- Species Eupatorium texense (Torr. & A.Gray) Rydb. accepted as Ageratina havanensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium thapsoides (DC.) DC. ex Niederl. accepted as Mikania thapsoides DC.
- Species Eupatorium theaefolium Benth. accepted as Ageratina theaefolia (Benth.) R.M.King & H.Rob.
- Species Eupatorium theiflorum Benth.
- Species Eupatorium theifolium Benth.
- Species Eupatorium thermarum B.L.Rob. accepted as Ayapanopsis thermarum (B.L.Rob.) H.Rob.
- Species Eupatorium thespesiaefolium DC. accepted as Bartlettina sordida (Less.) R.M.King & H.Rob.
- Species Eupatorium thespesiifolium DC.
- Species Eupatorium thieleanum Klatt accepted as Decachaeta thieleana (Klatt ex Klatt) R.M.King & H.Rob.
- Species Eupatorium thurnii B.L.Rob. accepted as Chromolaena thurnii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium thymifolium Britton accepted as Neocuatrecasia thymifolia (Britton) R.M.King & H.Rob.
- Species Eupatorium thyrsiflorum (Greene) B.L.Rob. accepted as Ageratina thyrsiflora (Greene) R.M.King & H.Rob.
- Species Eupatorium thyrsigerum Hieron. accepted as Critonia thyrsigera (Hieron.) R.M.King & H.Rob.
- Species Eupatorium thyrsoideum Moc., Sessé & Moc.
- Species Eupatorium thyrsoideum Moc. ex DC. accepted as Critonia thyrsoidea (Moc. ex DC.) R.M.King & H.Rob.
- Species Eupatorium thyrsoideum Sessé & Moc. accepted as Critonia thyrsoidea (Moc. ex DC.) R.M.King & H.Rob.
- Species Eupatorium thysanolepis B.L.Rob. accepted as Koanophyllon thysanolepis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium tinctorium Pohl ex Baker accepted as Koanophyllon tinctorium Arruda
- Species Eupatorium tinctorium Pohl ex Oliv. accepted as Koanophyllon tinctorium Arruda ex H.Kost.
- Species Eupatorium tinifolium Kunth accepted as Ageratina tinifolia (Kunth) R.M.King & H.Rob.
- Species Eupatorium toldense Hieron. accepted as Chromolaena toldensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium tolimense Hieron. accepted as Critoniella acuminata (Kunth) R.M.King & H.Rob.
- Species Eupatorium tomentellum Schrad. accepted as Ageratina tomentella (Schrad.) R.M.King & H.Rob.
- Species Eupatorium tomentellum (A.Gray) SCHRADER accepted as Ageratina tomentella (Schrad.) R.M.King & H.Rob.
- Species Eupatorium tomentosum DC. ex Steud.
- Species Eupatorium tomentosum Sessé & Moc. accepted as Brickellia tomentella A.Gray
- Species Eupatorium tomentosum Lam. accepted as Senecio penicillatus (Cass.) Sch.Bip.
- Species Eupatorium tomentosum DC. ex steudel accepted as Ageratina tomentella (Schrad.) R.M.King & H.Rob.
- Species Eupatorium tonduzii Klatt accepted as Ageratina tonduzii (Klatt) R.M.King & H.Rob.
- Species Eupatorium toppingianum Elmer
- Species Eupatorium toroi B.L.Rob. accepted as Asplundianthus toroi (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium torondoyense V.M.Badillo accepted as Hebeclinium torondoyense (V.M.Badillo) R.M.King & H.Rob.
- Species Eupatorium torreyanum Short ex Torr. & A.Gray accepted as Eupatorium hyssopifolium L.
- Species Eupatorium torreyanum Short & R.Peter accepted as Eupatorium hyssopifolium L.
- Species Eupatorium tortifolium Chapm. accepted as Eupatorium cuneifolium Willd.
- Species Eupatorium tovarense B.L.Rob. accepted as Ayapana tovarensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium tozanense Hayata accepted as Eupatorium chinense L.
- Species Eupatorium tozziifolium DC.
- Species Eupatorium tozziifolium DC. accepted as Chromolaena congesta (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium trachyphyllum Hieron. accepted as Asplundianthus trachyphyllus (Hieron.) R.M.King & H.Rob.
- Species Eupatorium tracyi Greene accepted as Ageratina aromatica (L.) Spach
- Species Eupatorium tranninense Glaz.
- Species Eupatorium trapezoideum Kunth accepted as Ageratina trapezoidea (Kunth) R.M.King & H.Rob.
- Species Eupatorium tremulum Hook. & Arn. accepted as Raulinoreitzia tremula (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium trianae B.L.Rob. accepted as Barrosoa trianae (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium triangulare Moc., Sessé & Moc. accepted as Ageratina deltoidea (Jacq.) R.M.King & H.Rob.
- Species Eupatorium triangulare Poiret accepted as Chromolaena corymbosa (Aubl.) R.M.King & H.Rob.
- Species Eupatorium triangulare Poir. accepted as Chromolaena corymbosa (Aubl.) R.M.King & H.Rob.
- Species Eupatorium triangulare Moc. ex Sessé & Moc. accepted as Ageratina deltoidea (Jacq.) R.M.King & H.Rob.
- Species Eupatorium triangulare Moc. ex DC. accepted as Ageratina deltoidea (Jacq.) R.M.King & H.Rob.
- Species Eupatorium triangulatum (ex DC.) Alam ex DC. accepted as Ageratina triangulata (alam. ex DC.) B.L.Turner
- Species Eupatorium triangulatum Alamán & DC. accepted as Ageratina rubricaulis (Kunth) R.M.King & H.Rob.
- Species Eupatorium tricephalotes Sch.Bip. ex Baker accepted as Koanophyllon tricephalotes (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium trichobasis Baker accepted as Gyptidium trichobasis (Baker) R.M.King & H.Rob.
- Species Eupatorium trichophorum DC. accepted as Chromolaena hirsuta (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium trichopodium DC.
- Species Eupatorium trichosanthum A.Rich. accepted as Brickellia diffusa (Vahl) A.Gray
- Species Eupatorium trichospermoides Alain
- Species Eupatorium trichospiroides Alain
- Species Eupatorium trichotomum Sch.Bip. accepted as Heterocondylus alatus (Vell.) R.M.King & H.Rob.
- Species Eupatorium trichotomum Sch.Bip. ex Baker accepted as Ageratina gloeoclada (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium trifidum Vahl accepted as Eupatorium cannabinum L.
- Species Eupatorium triflorum Aubl. accepted as Piptocarpha triflora (Aubl.) Benn. ex Baker
- Species Eupatorium trifoliatum hort.dorp. ex Steven
- Species Eupatorium trifoliatum hort. dorp. ex Stev. accepted as Eupatorium cannabinum L.
- Species Eupatorium trifoliatum Lucé accepted as Eupatorium cannabinum L.
- Species Eupatorium trifoliatum L. accepted as Eupatorium purpureum L.
- Species Eupatorium trigonocarpum Griseb. accepted as Chromolaena trigonocarpa (Griseb.) R.M.King & H.Rob.
- Species Eupatorium trigonum Gardner accepted as Stomatanthes trigonus (Gardner) H.Rob.
- Species Eupatorium trijullouse B.L.Rob.
- Species Eupatorium trinervatum Sessé & Moc. accepted as Baccharis trinervis Pers.
- Species Eupatorium trinervium Sch.Bip. accepted as Fleischmannia trinervia (Sch.Bip.) R.M.King & H.Rob.
- Species Eupatorium trinionum McVaugh accepted as Ageratina triniona (McVaugh) R.M.King & H.Rob.
- Species Eupatorium trinitanum (DC.) M.Gómez accepted as Mikania trinitaria DC.
- Species Eupatorium trinitarium (DC.) M.Gómez accepted as Mikania trinitaria DC.
- Species Eupatorium trinitense (Kuntze) Rusby & B.L.Rob. accepted as Ayapana trinitensis (Kuntze) R.M.King & H.Rob.
- Species Eupatorium triosteifolium Rusby accepted as Ayapanopsis triosteifolia (Rusby) R.M.King & H.Rob.
- Species Eupatorium tripartitum (Makino) Murata & H.Koyama
- Species Eupatorium triplinerve Vahl accepted as Ayapana triplinervis (Vahl) R.M.King & H.Rob.
- Species Eupatorium triplinerve Blume accepted as Ayapana triplinervis (Vahl) R.M.King & H.Rob.
- Species Eupatorium triptychum B.L.Rob. accepted as Standleyanthus triptychus (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium triradiatum Urb. accepted as Koanophyllon triradiatum (Urb.) R.M.King & H.Rob.
- Species Eupatorium trisectum Hook. & Arn.
- Species Eupatorium triste DC. accepted as Ageratina tristis (DC.) R.M.King & H.Rob.
- Species Eupatorium trixoides Mart. ex Baker accepted as Ayapanopsis oblongifolia (Gardner) R.M.King & H.Rob.
- Species Eupatorium trujillense B.L.Rob. accepted as Chromolaena trujillensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium truncatum Elliott
- Species Eupatorium truncatum Muhl.
- Species Eupatorium truncatum Mühlenb. ex Elliott accepted as Eupatorium sessilifolium L.
- Species Eupatorium truncatum Muhl. ex Willd. accepted as Eupatorium perfoliatum L.
- Species Eupatorium tubaraoense Hieron. accepted as Campuloclinium tubaraoense (Hieron.) R.M.King & H.Rob.
- Species Eupatorium tubiflorum Benth. accepted as Piptothrix areolaris (DC.) R.M.King & H.Rob.
- Species Eupatorium tucumanense Lillo & B.L.Rob. accepted as Ayapanopsis tucumanensis (Lillo & B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium tuerckheimii Klatt accepted as Bartlettina tuerckheimii (Klatt) R.M.King & H.Rob.
- Species Eupatorium tulanum Klatt accepted as Vernonia liatroides DC.
- Species Eupatorium tunariense (Hieron.) B.L.Rob. accepted as Chromolaena tunariensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium tunii L.O.Williams accepted as Critonia bartlettii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium turbacense Hieron. accepted as Ayapana turbacensis (Hieron.) R.M.King & H.Rob.
- Species Eupatorium turbinatum A.Gray accepted as Chromolaena bigelovii (A.Gray) R.M.King & H.Rob.
- Species Eupatorium turczaninowii B.L.Rob. accepted as Aristeguietia glutinosa (Lam.) R.M.King & H.Rob.
- Species Eupatorium turquinense Alain accepted as Koanophyllon turquinense (Alain) Borhidi
- Species Eupatorium tweedieanum Hook. & Arn. accepted as Hatschbachiella tweedieana (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium tyleri B.L.Rob. ex Gleason accepted as Chromolaena tyleri (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium tyleri B.L.Rob. accepted as Chromolaena tyleri (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium uber B.L.Rob. accepted as Kaunia longipetiolata (Sch.Bip. ex Rusby) R.M.King & H.Rob.
- Species Eupatorium ulei Hieron. accepted as Chromolaena ulei (Hieron.) R.M.King & H.Rob.
- Species Eupatorium ultraisthmium McVaugh accepted as Eupatoriastrum nelsonii Greenm.
- Species Eupatorium umbelliforme Dusén ex Malme accepted as Chromolaena umbelliformis (Dusén ex Malme) R.M.King & H.Rob.
- Species Eupatorium umbellulatum Spreng. accepted as Piptocarpha umbellulata (Spreng.) Baker
- Species Eupatorium umbrosum Benth. accepted as Ageratina pseudochilca (Benth.) R.M.King & H.Rob.
- Species Eupatorium umbrosum Klatt accepted as Fleischmannia klattiana (Hieron.) R.M.King & H.Rob.
- Species Eupatorium uniflorum Sessé & Moc. accepted as Critoniopsis salicifolia (DC.) H.Rob.
- Species Eupatorium urbani Ekman ex Urb.
- Species Eupatorium urbanii Ekman
- Species Eupatorium urbanii Ekman ex Urban accepted as Ageratina urbanii (Ekman ex Urb.) R.M.King & H.Rob.
- Species Eupatorium urolepis Daveau accepted as Urolepis hecatantha (DC.) R.M.King & H.Rob.
- Species Eupatorium uromeres B.L.Rob. accepted as Chromolaena uromeres (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium urticaefolium L. accepted as Praxelis pauciflora (Kunth) R.M.King & H.Rob.
- Species Eupatorium urticaefolium L.f. accepted as Praxelis pauciflora (Kunth) R.M.King & H.Rob.
- Species Eupatorium urticaefolium Reichard accepted as Ageratina altissima (L.) R.M.King & H.Rob.
- Species Eupatorium urticifolium Reich.
- Species Eupatorium urticifolium auct. non L. accepted as Praxelis clematidea (Griseb.) R.M.King & H.Rob.
- Species Eupatorium urticifolium Reichard accepted as Ageratina altissima var. altissima (L.) R.M.King & H.Rob.
- Species Eupatorium urticifolium Banks ex Griseb. accepted as Fleischmannia microstemon (Cass.) R.M.King & H.Rob.
- Species Eupatorium urticifolium L.f. accepted as Praxelis diffusa (Rich.) Pruski
- Species Eupatorium urticoides Sch.Bip. ex Hieron. accepted as Chromolaena urticoides (Sch.Bip. ex Hieron.) R.M.King & H.Rob.
- Species Eupatorium urubambense B.L.Rob. accepted as Cronquistianthus urubambensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium vacciniaefolium Benth. accepted as Ageratina vacciniaefolia (Benth.) R.M.King & H.Rob.
- Species Eupatorium vacciniifolium Benth.
- Species Eupatorium vagans Wall. accepted as Vernonia scandens DC.
- Species Eupatorium vagum Gardner accepted as Grazielia gaudichaudeana (DC.) R.M.King & H.Rob.
- Species Eupatorium vahlianum Urb. accepted as Chromolaena trigonocarpa (Griseb.) R.M.King & H.Rob.
- Species Eupatorium vahlianum Urb. ex Duss accepted as Chromolaena trigonocarpa (Griseb.) R.M.King & H.Rob.
- Species Eupatorium valerioanum Standl. accepted as Fleischmannia hymenophylla (Klatt) R.M.King & H.Rob.
- Species Eupatorium vallincola DC. accepted as Ageratina vallincola (DC.) R.M.King & H.Rob.
- Species Eupatorium valverdeanum Klatt ex T.Durand & Pitt.
- Species Eupatorium valverdeanum Klatt accepted as Neurolaena lobata (L.) R.Br. ex Cass.
- Species Eupatorium vanillosmoides Sch.Bip. ex Baker accepted as Steyermarkina pyrifolia (DC.) R.M.King & H.Rob.
- Species Eupatorium vargasianum DC. accepted as Critoniella vargasiana (DC.) R.M.King & H.Rob.
- Species Eupatorium variabile Makino
- Species Eupatorium variegatum (DC.) Malme accepted as Praxelis grandiflora (DC.) Sch.Bip.
- Species Eupatorium variifolium Bartl. accepted as Eupatorium cannabinum L.
- Species Eupatorium variolatum B.L.Rob. accepted as Disynaphia variolata (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium vaseyi Porter accepted as Eupatorium sessilifolium L.
- Species Eupatorium vattuonei Hicken accepted as Austrobrickellia patens (D.Don ex Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium vauthierianum DC. accepted as Heterocondylus alatus (Vell.) R.M.King & H.Rob.
- Species Eupatorium velutinum Gardner accepted as Austrocritonia velutina (Gardner) R.M.King & H.Rob.
- Species Eupatorium venezuelense V.M.Badillo accepted as Badilloa venezuelensis (V.M.Badillo) R.M.King & H.Rob.
- Species Eupatorium venosissimum Rusby accepted as Ophryosporus venosissimus (Rusby) B.L.Rob.
- Species Eupatorium venosum Mart. ex Baker accepted as Chromolaena squalida (DC.) R.M.King & H.Rob.
- Species Eupatorium ventillanum Cuatrec. accepted as Ageratina riparia (Regel) R.M.King & H.Rob.
- Species Eupatorium venulosum A.Gray accepted as Ageratina venulosa (A.Gray) R.M.King & H.Rob.
- Species Eupatorium veraecrucis steudel accepted as Brickellia paniculata (Mill.) B.L.Rob.
- Species Eupatorium verae-crucis Steud. accepted as Brickellia paniculata (Mill.) B.L.Rob.
- Species Eupatorium verbenaceum DC. accepted as Chromolaena verbenacea (DC.) R.M.King & H.Rob.
- Species Eupatorium verbenaefolium Michaux accepted as Eupatorium rotundifolium L.
- Species Eupatorium verbenifolium Reichard accepted as Eupatorium rotundifolium var. rotundifolium L.
- Species Eupatorium verbenifolium Michx. accepted as Eupatorium pilosum Walter
- Species Eupatorium vernale Vatke & Kurtz accepted as Ageratina vernalis (Vatke & Kurtz) R.M.King & H.Rob.
- Species Eupatorium vernicosum Sch.Bip. ex Greenm. accepted as Ageratina vernicosa (Sch.Bip. ex Greenm.) R.M.King & H.Rob.
- Species Eupatorium vernonioides Coulter accepted as Chromolaena glaberrima (DC.) R.M.King & H.Rob.
- Species Eupatorium vernonioides J.M.Coult. accepted as Chromolaena glaberrima (DC.) R.M.King & H.Rob.
- Species Eupatorium vernoniopsis Sch.Bip.
- Species Eupatorium vernoniopsis Sch.Bip. ex Baker accepted as Gyptis vernoniopsis (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium veronicaefolium Kunth accepted as Brickellia veronicaefolia (Kunth) A.Gray
- Species Eupatorium veronicifolium Kunth accepted as Brickellia veronicaefolia (Kunth) A.Gray
- Species Eupatorium versicolor Wall. accepted as Acilepis divergens (Roxb.) H.Rob. & Skvarla
- Species Eupatorium verticillatum Sessé & Moc.
- Species Eupatorium verticillatum Lam. accepted as Eupatorium dubium Willd. ex Poiret
- Species Eupatorium vestitum Poepp. accepted as Hebeclinium vestitum (Poepp.) R.M.King & H.Rob.
- Species Eupatorium vestitum Spreng. accepted as Otopappus hirsutus (Sw.) R.L.Hartm. & Stuessy
- Species Eupatorium vetularum Standl. & Steyerm. accepted as Ageratina caeciliae (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium viburnifolium Greene accepted as Ageratina aromatica (L.) Spach
- Species Eupatorium viburnoides DC. accepted as Ageratina viburnoides (DC.) R.M.King & H.Rob.
- Species Eupatorium villosum Sw. accepted as Koanophyllon villosum (Sw.) R.M.King & H.Rob.
- Species Eupatorium villosum Bertero ex DC. accepted as Koanophyllon obtusissimum (DC.) R.M.King & H.Rob.
- Species Eupatorium vincaefolium Lam. accepted as Mikania parviflora (Aubl.) H.Karst.
- Species Eupatorium vincifolium Lam. accepted as Mikania parviflora (Aubl.) H.Karst.
- Species Eupatorium vindex DC. accepted as Chromolaena vindex (DC.) R.M.King & H.Rob.
- Species Eupatorium violaceum Bertero ex Spreng. accepted as Fleischmannia microstemon (Cass.) R.M.King & H.Rob.
- Species Eupatorium violaceum Raf. accepted as Conoclinium coelestinum (L.) DC.
- Species Eupatorium virgatum D.Don ex Hook. & Arn. accepted as Acanthostyles buniifolius (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium virgatum D.Don ex Hook. & Am. accepted as Acanthostyles buniifolius (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium virgatum Schrad. accepted as Fleischmannia pycnocephala (Less.) R.M.King & H.Rob.
- Species Eupatorium viride E.H.L.Krause accepted as Adenostyles alpina (L.) Bluff & Fingerh.
- Species Eupatorium viride E. H. Krause accepted as Adenostyles alpina (L.) Bluff & Fingerh.
- Species Eupatorium viridiflorum Baker accepted as Bartlettina hemisphaerica (DC.) R.M.King & H.Rob.
- Species Eupatorium viscidipes B.L.Rob. accepted as Fleischmannia viscidipes (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium viscidum Hook. & Arn. accepted as Lorentzianthus viscidus (Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium viscosissimum Rolfe accepted as Ageratina viscosissima (Rolfe) R.M.King & H.Rob.
- Species Eupatorium viscosum Wall. accepted as Eupatorium cannabinum L.
- Species Eupatorium viscosum Kunth accepted as Ageratina viscosa (Kunth) R.M.King & H.Rob.
- Species Eupatorium vitalbae DC. accepted as Heterocondylus vitalbae (DC.) R.M.King & H.Rob.
- Species Eupatorium vitifolium Klatt accepted as Eupatoriastrum triangulare (DC.) B.L.Rob.
- Species Eupatorium vitifolium Sch.Bip. accepted as Eupatoriastrum triangulare (DC.) B.L.Rob.
- Species Eupatorium voglii B.L.Rob. accepted as Chromolaena voglii (B.L.Rob.) H.Huber
- Species Eupatorium volckmanni Philippi accepted as Ophryosporus triangularis Meyen
- Species Eupatorium volckmannii Phil.
- Species Eupatorium volkameriaefolium Wall. accepted as Vernonia volkameriifolia DC.
- Species Eupatorium volkameriifolium Wall. accepted as Vernonia volkameriifolia DC.
- Species Eupatorium volkensii Hieron. accepted as Cronquistianthus volkensii (Hieron.) R.M.King & H.Rob.
- Species Eupatorium volubile (Poepp.) Vahl accepted as Mikania cordata (Burm.f.) B.L.Rob.
- Species Eupatorium volubile Norona accepted as Mikania cordata (Burm.f.) B.L.Rob.
- Species Eupatorium vulcanicum Benth. ex Oersted accepted as Ageratina pichinchensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium vulcanicum Benth. accepted as Ageratina pichinchensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium vulcanicum Benth. ex Oerst. accepted as Ageratina pichinchensis (Kunth) R.M.King & H.Rob.
- Species Eupatorium wageneri Hieron. accepted as Condylidium iresinoides (Kunth) R.M.King & H.Rob.
- Species Eupatorium wallichii DC. accepted as Eupatorium chinense L.
- Species Eupatorium warmingii Sch.Bip. ex Baker accepted as Stomatanthes dyctiophyllus (DC.) H.Rob.
- Species Eupatorium weberbaueri Hieron. accepted as Crossothamnus weberbaueri (Hieron.) R.M.King & H.Rob.
- Species Eupatorium weddellii B.L.Rob. accepted as Neocuatrecasia weddellii (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium weinmannianum Regel & Körn. accepted as Ageratina ligustrina (DC.) R.M.King & H.Rob.
- Species Eupatorium williamsii Clewell
- Species Eupatorium williamsii A.Clewell accepted as Bartlettina williamsii R.M.King & H.Rob.
- Species Eupatorium wrightii A.Gray accepted as Ageratina wrightii (A.Gray) R.M.King & H.Rob.
- Species Eupatorium xalapanum B.L.Turner accepted as Bartlettina xalapana (B.L.Turner) B.L.Turner
- Species Eupatorium xalapense Kunth accepted as Ageratina glabrata (Kunth) R.M.King & H.Rob.
- Species Eupatorium xanthochlorum B.L.Rob. accepted as Ageratina malacolepis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium xerolepis Sch.Bip. ex Baker accepted as Austrobrickellia patens (D.Don ex Hook. & Arn.) R.M.King & H.Rob.
- Species Eupatorium xestolepidoides Wurd. accepted as Chromolaena xestolepidoides (Wurdack) R.M.King & H.Rob.
- Species Eupatorium xestolepidoides Wurdack accepted as Chromolaena xestolepidoides (Wurdack) R.M.King & H.Rob.
- Species Eupatorium xestolepis B.L.Rob. accepted as Chromolaena xestolepis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium xylophylloides DC. accepted as Raulinoreitzia crenulata (Spreng.) R.M.King & H.Rob.
- Species Eupatorium xylorhizum Sch.Bip.
- Species Eupatorium xylorhizum Sch.Bip. ex Baker accepted as Chromolaena xylorrhiza (Sch.Bip. ex Baker) R.M.King & H.Rob.
- Species Eupatorium yakushimaense Masam. & Kitam.
- Species Eupatorium yashanalense Whittem. accepted as Critonia yashanalensis (Whittem.) R.M.King & H.Rob.
- Species Eupatorium yavianum Lasser & Maguire accepted as Guayania yaviana (Lasser & Maguire) R.M.King & H.Rob.
- Species Eupatorium ymalense B.L.Rob. accepted as Koanophyllon albicaulis (Sch.Bip. ex Klatt) R.M.King & H.Rob.
- Species Eupatorium yungasense B.L.Rob. accepted as Fleischmannia yungasensis (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium zacuapanum B.L.Turner accepted as Fleischmannia purpusii R.M.King & H.Rob.
- Species Eupatorium zeylanicum L. accepted as Vernonia zeylanica (L.) Less.
- Species Eupatorium zibellinum Sessé & Moc. accepted as Fleischmannia arguta (Kunth) B.L.Rob.
- Species Eupatorium zinniifolium B.L.Rob. accepted as Ageratina zinniifolia (B.L.Rob.) R.M.King & H.Rob.
- Species Eupatorium zunilanum Standl. & Steyerm. accepted as Ageratina zunilana (Standl. & Steyerm.) R.M.King & H.Rob.
- Genus Eutrochium Raf. (5)
- Subtribe Fleischmanniinae R.M.King & H.Rob. (104)
- Subtribe Gyptidinae R.M.King & H.Rob.
- Subtribe Hebecliniinae R.M.King & H.Rob.
- Subtribe Hofmeisteriinae R.M.King & H.Rob.
- Subtribe Kuhniinae B.L.Rob. accepted as Alomiinae Less.
- Subtribe Liatrinae R.M.King & H.Rob. (71)
- Subtribe Mikaniinae R.M.King & H.Rob. (451)
- Subtribe Neomirandeinae R.M.King & H.Rob.
- Subtribe Oaxacaniinae R.M.King & H.Rob. accepted as Hofmeisteriinae R.M.King & H.Rob.
- Subtribe Oxylobinae R.M.King & H.Rob.
- Subtribe Piqueriinae Benth. & Hook.f. accepted as Ageratinae Less.
- Subtribe Praxelinae R.M.King & H.Rob.
- Subtribe Trichocoroninae R.M.King & H.Rob.
- Genus Acanthostyles R.M.King & H.Rob. (2)
- Genus Acritopappus R.M.King & H.Rob. (17)
- Genus Addisonia Rusby accepted as Helogyne Nutt.
- Genus Adenocritonia R.M.King & H.Rob. (3)
- Genus Adenostema Desport.
- Genus Adenostema N.H.F.Desp. accepted as Adenostemma J.R.Forst & G.Forst.
- Genus Adenostemma J.R.Forst & G.Forst. (27)
- Genus Ageratella A.Gray ex S.Watson (2)
- Genus Ageratina Spach (328)
- Genus Ageratiopsis Sch.Bip. ex Benth. & Hook.f. accepted as Barrosoa R.M.King & H.Rob.
- Genus Ageratum L. (53)
- Genus Agrianthus Mart. ex DC. (9)
- Genus Allomia DC. accepted as Alomia Kunth
- Genus Alomia Kunth (5)
- Genus Alomiella R.M.King & H.Rob. (2)
- Genus Amboroa Cabrera (2)
- Genus Ammopursus Small accepted as Liatris Gaertn. ex Schreb.
- Genus Amolinia R.M.King & H.Rob. (1)
- Genus Antillia R.M.King & H.Rob. (1)
- Genus Aristeguietia R.M.King & H.Rob. (20)
- Genus Arrojadoa Mattf. accepted as Arrojadocharis Mattf.
- Genus Arrojadocharis Mattf. (2)
- Genus Asanthus R.M.King & H.Rob. (3)
- Genus Ascidiogyne Cuatrec. (2)
- Genus Asplundianthus R.M.King & H.Rob. (11)
- Genus Austrobrickellia R.M.King & H.Rob. (3)
- Genus Austrocritonia R.M.King & H.Rob. (4)
- Genus Austroeupatorium R.M.King & H.Rob. (17)
- Genus Ayapana Spach (17)
- Genus Ayapanopsis R.M.King & H.Rob. (20)
- Genus Badilloa R.M.King & H.Rob. (11)
- Genus Bahianthus R.M.King & H.Rob. (1)
- Genus Barroetea A.Gray (6)
- Genus Barrosoa R.M.King & H.Rob. (13)
- Genus Bartlettina R.M.King & H.Rob. (39)
- Genus Batschia Moench accepted as Ageratina Spach
- Genus Bejaranoa R.M.King & H.Rob. (2)
- Genus Bembicium Mart. ex Baker accepted as Praxelis Cass.
- Genus Biasolettia Pohl ex Baker accepted as Ayapanopsis R.M.King & H.Rob.
- Genus Biolettia Greene accepted as Trichocoronis A.Gray
- Genus Bishopiella R.M.King & H.Rob. (1)
- Genus Bishovia R.M.King & H.Rob. (2)
- Genus Blakeanthus R.M.King & H.Rob. (2)
- Genus Bolbostylis Gardner accepted as Ayapanopsis R.M.King & H.Rob.
- Genus Brachyandra Phil. accepted as Helogyne Nutt.
- Genus Brickellia Elliott (109)
- Genus Brickelliastrum R.M.King & H.Rob. (1)
- Genus Bulbostylis DC. accepted as Brickellia Elliott
- Genus Bulbostylis Gardner
- Genus Bustamenta alam. ex DC. accepted as Ageratina Spach
- Genus Calostelma D.Don accepted as Liatris Gaertn. ex Schreb.
- Genus Campovassouria R.M.King & H.Rob. (2)
- Genus Campuloclinium DC. (15)
- Genus Caradesia Raf. accepted as Eupatorium Tourn. ex L.
- Genus Carelia Juss. ex Cav. accepted as Mikania Willd.
- Genus Carelia Less. accepted as Radlkoferotoma Kuntze
- Genus Carelia moehring ; moehring ex Adans. accepted as Ageratum L.
- Genus Carminatia Moc. ex DC. (4)
- Genus Carphochaete A.Gray (6)
- Genus Carterothamnus R.M.King accepted as Hofmeisteria Walp. (1)
- Genus Castenedia R.M.King & H.Rob. (1)
- Genus Catolesia D.J.N.Hind (2)
- Genus Catophyllum Pohl ex Baker accepted as Mikania Willd.
- Genus Cavalcantia R.M.King & H.Rob. (2)
- Genus Centenaria P.Gonzáles, A.Cano & H.Rob. (1)
- Genus Chacoa R.M.King & H.Rob. (1)
- Genus Chromolaena DC. (176)
- Genus Chrone Dulac accepted as Eupatorium Tourn. ex L.
- Genus Ciceronia Urb. (1)
- Genus Clavigera DC. accepted as Brickellia Elliott
- Genus Coelestina Cass. accepted as Ageratum L.
- Genus Coleosanthus Cass. accepted as Brickellia Elliott
- Genus Condylidium R.M.King & H.Rob. (2)
- Genus Condylopodium R.M.King & H.Rob. (6)
- Genus Conocliniopsis R.M.King & H.Rob.
- Genus Conoclinium DC. (4)
- Genus Corethamnium R.M.King & H.Rob. (1)
- Genus Corynanthelium Kunze accepted as Mikania Willd.
- Genus Critonia P.Browne (43)
- Genus Critoniadelphus R.M.King & H.Rob. (2)
- Genus Critoniella R.M.King & H.Rob. (6)
- Genus Cronquistia R.M.King (1)
- Genus Cronquistianthus R.M.King & H.Rob. (28)
- Genus Crossothamnus R.M.King & H.Rob. (4)
- Genus Cunigunda Bubani accepted as Eupatorium Tourn. ex L.
- Genus Dadia Vell. accepted as Alomia Kunth
- Genus Dasycondylus R.M.King & H.Rob. (8)
- Genus Decachaeta DC. (7)
- Genus Decachaeta Gardner accepted as Acritopappus R.M.King & H.Rob.
- Genus Diacranthera R.M.King & H.Rob. (3)
- Genus Dimorpholepis (G.M.Barroso) R.M.King & H.Rob. accepted as Grazielia R.M.King & H.Rob.
- Genus Dissothrix A.Gray (1)
- Genus Disynaphia Hook. & Arn. ex DC. (17)
- Genus Dunantia DC. accepted as Isocarpha R.Br.
- Genus Dyscritogyne R.M.King & H.Rob. (2)
- Genus Eitenia R.M.King & H.Rob. (2)
- Genus Ellenbergia Cuatrec. (1)
- Genus Eriopappus Hort. ex Loudon accepted as Eupatorium Tourn. ex L.
- Genus Erythradenia (B.L.Rob.) R.M.King & H.Rob. (1)
- Genus Eupatoriadelphus R.M.King & H.Rob. accepted as Eupatorium Tourn. ex L.
- Genus Eupatoriastrum Greenm. (7)
- Genus Eupatorina R.M.King & H.Rob. (2)
- Genus Eupatoriopsis Hieron. (1)
- Genus Ferreyrella S.F.Blake (2)
- Genus Fleischmanniopsis R.M.King & H.Rob. (5)
- Genus Flyriella R.M.King & H.Rob. (6)
- Genus Gardnerina R.M.King & H.Rob. (1)
- Genus Gongrostylus R.M.King & H.Rob. (2)
- Genus Goyazianthus R.M.King & H.Rob. (1)
- Genus Grazielia R.M.King & H.Rob. (10)
- Genus Grisebachianthus R.M.King & H.Rob. (8)
- Genus Grosvenoria R.M.King & H.Rob. (7)
- Genus Guayania R.M.King & H.Rob. (6)
- Genus Guevaria R.M.King & H.Rob. (5)
- Genus Gymnocondylus R.M.King & H.Rob. (1)
- Genus Gymnocoronis DC. (4)
- Genus Gyptidium R.M.King & H.Rob. (2)
- Genus Gyptis (Cass.) Cass. (7)
- Genus Hatschbachiella R.M.King & H.Rob. (2)
- Genus Hebeclinium DC. (27)
- Genus Helogyne Nutt. (8)
- Genus Helogyne Benth. accepted as Hofmeisteria Walp.
- Genus Heterocondylus R.M.King & H.Rob. (13)
- Genus Hofmeisteria Walp. (11)
- Genus Hughesia R.M.King & H.Rob. (1)
- Genus Idiothamnus R.M.King & H.Rob. (4)
- Genus Iltisia S.F.Blake (2)
- Genus Imeria R.M.King & H.Rob. (2)
- Genus Isocarpha R.Br. (5)
- Genus Jaliscoa S.Watson (3)
- Genus Jaramilloa R.M.King & H.Rob. (2)
- Genus Kanimia Gardner accepted as Mikania Willd.
- Genus Kaunia R.M.King & H.Rob. (12)
- Genus Koanophyllon Arruda (133)
- Genus Kuhnia L. accepted as Brickellia Elliott (2)
- Genus Kyrsteniopsis R.M.King & H.Rob. (4)
- Genus Lacinaria Hill accepted as Liatris Gaertn. ex Schreb. (2)
- Genus Lapidia Roque & S.C.Ferreira (1)
- Genus Lasiolaena R.M.King & H.Rob. (7)
- Genus Lavenia Sw. accepted as Adenostemma J.R.Forst & G.Forst.
- Genus Lepidesmia Klatt (2)
- Genus Leptoclinium (Nutt.) Benth. & Hook.f. (2)
- Genus Leptoclinium (Nutt.) A.Gray
- Genus Leto Phil. (1)
- Genus Litothamnus R.M.King & H.Rob. (2)
- Genus Lomatozona Baker (5)
- Genus Lorentzianthus R.M.King & H.Rob. (1)
- Genus Lourteigia R.M.King & H.Rob. (11)
- Genus Macropodina R.M.King & H.Rob. (3)
- Genus Macvaughiella R.M.King & H.Rob. (2)
- Genus Mallinoa J.M.Coult. accepted as Ageratina Spach
- Genus Malmeanthus R.M.King & H.Rob. (3)
- Genus Malperia S.Watson (1)
- Genus Matudina R.M.King & H.Rob. (1)
- Genus Metastevia Grashoff
- Genus Mexianthus B.L.Rob. (1)
- Genus Micania D.Dietr. accepted as Mikania Willd.
- Genus Microspermum Lag. (8)
- Genus Mikania F.W.Schmidt accepted as Mikania Willd.
- Genus Monogereion G.M.Barroso & R.M.King (1)
- Genus Morithamnus R.M.King, H.Rob. & G.M.Barroso (2)
- Genus Mustelia Spreng. accepted as Stevia Cav.
- Genus Neocabreria R.M.King & H.Rob. (4)
- Genus Neocuatrecasia R.M.King & H.Rob. (12)
- Genus Neohintonia R.M.King & H.Rob. (1)
- Genus Neomirandea R.M.King & H.Rob. (32)
- Genus Nesomia B.L.Turner (1)
- Genus Nothites Cass. accepted as Stevia Cav.
- Genus Nothobaccharis R.M.King & H.Rob. (1)
- Genus Oaxacania B.L.Rob. & Greenm. (1)
- Genus Ophryosporus Meyen (40)
- Genus Osmiopsis R.M.King & H.Rob. (1)
- Genus Oxylobus (Moc. ex DC.) A.Gray (7)
- Genus Pachythamnus (R.M.King & H.Rob.) R.M.King & H.Rob. (1)
- Genus Parapiqueria R.M.King & H.Rob. (1)
- Genus Peteravenia R.M.King & H.Rob. (6)
- Genus Phalacraea DC. (4)
- Genus Phanerostylis (A.Gray) R.M.King & H.Rob. (5)
- Genus Phania DC. (6)
- Genus Piptothrix A.Gray (5)
- Genus Piqueria Cav. (8)
- Genus Piqueriella R.M.King & H.Rob. (1)
- Genus Piqueriopsis R.M.King (1)
- Genus Planaltoa Taub. (2)
- Genus Platypodanthera R.M.King & H.Rob. (2)
- Genus Pleurocoronis R.M.King & H.Rob. (3)
- Genus Podophania Baill. accepted as Hofmeisteria Walp.
- Genus Polyanthina R.M.King & H.Rob. (1)
- Genus Praxeliopsis G.M.Barroso (1)
- Genus Praxelis Cass. (16)
- Genus Prolobus R.M.King & H.Rob. (1)
- Genus Pseudobrickellia R.M.King & H.Rob. (3)
- Genus Pseudokyrsteniopsis R.M.King & H.Rob. accepted as Eupatorium Tourn. ex L. (1)
- Genus Radlkoferotoma Kuntze (4)
- Genus Raulinoreitzia R.M.King & H.Rob. (3)
- Genus Revealia R.M.King & H.Rob. (1)
- Genus Rosalesia La Llave accepted as Brickellia Elliott
- Genus Santosia R.M.King & H.Rob. (1)
- Genus Sartorina R.M.King & H.Rob. (1)
- Genus Schaetzellia Sch.Bip. accepted as Macvaughiella R.M.King & H.Rob.
- Genus Scherya R.M.King & H.Rob. (1)
- Genus Sciadocephala Mattf. (5)
- Genus Sclerolepis Cass. (1)
- Genus Semiria D.J.N.Hind (1)
- Genus Shinnersia R.M.King & H.Rob. (1)
- Genus Siapaea Pruski (1)
- Genus Spaniopappus B.L.Rob. (5)
- Genus Sphaereupatorium (O.Hoffm.) Kuntze ex B.L.Rob. (1)
- Genus Standleyanthus R.M.King & H.Rob. (1)
- Genus Stevia Cav. (273)
- Genus Steviopsis R.M.King & H.Rob. (6)
- Genus Steyermarkina R.M.King & H.Rob. (4)
- Genus Stomatanthes R.M.King & H.Rob. (17)
- Genus Stylotrichium Mattf. (5)
- Genus Suprago Gaertn. accepted as Liatris Gaertn. ex Schreb.
- Genus Symphyopappus Turcz. (14)
- Genus Tamaulipa R.M.King & H.Rob. (1)
- Genus Teixeiranthus R.M.King & H.Rob. (1)
- Genus Trichocoronis A.Gray (2)
- Genus Trichogonia Gardner (24)
- Genus Trichogoniopsis R.M.King & H.Rob. (4)
- Genus Tuberostylis Steetz (2)
- Genus Uleophytum Hieron.
- Genus Uncasia Greene
- Genus Urbananthus R.M.King & H.Rob. (2)
- Genus Urolepis (DC.) R.M.King & H.Rob. (1)
- Genus Viereckia R.M.King & H.Rob. accepted as Eupatorium Tourn. ex L. (1)
- Genus Vittetia R.M.King & H.Rob. (2)
- Genus Willoughbya Neck. ex Kuntze accepted as Mikania Willd. (1)
- Genus Willugbaeya Neck. accepted as Mikania Willd.
- Genus Zyzyura H.Rob. & Pruski
- Species coccinei
- Tribe Feddeeae Pruski, Herrera, Anderb. & Franc.-Ort.
- Tribe Gnaphalieae Cass. ex Lecoq & Juill. (2 268)
- Tribe Helenieae Lindl. (138)
- Tribe Heliantheae Cass. (1 728)
- Tribe Inuleae Cass. (665)
- Tribe Iveae Rydb. accepted as Heliantheae Cass.
- Tribe Madieae Jeps. (228)
- Tribe Millerieae Lindl. (478)
- Tribe Neurolaeneae Rydb. (188)
- Tribe Perityleae B.G.Baldwin (78)
- Tribe Plucheeae Anderb. accepted as Inuleae Cass.
- Tribe Polymnieae (H.Rob.) Panero (8)
- Tribe Senecioneae Cass. (3 803)
- Tribe Tageteae Cass. (267)
- Tribe Ursinieae H.Rob. & Brettell accepted as Anthemideae Cass.
- Subtribe Nannoglottidinae Y.R.Ling accepted as Nannoglottidinae G.L. Nesom
- Genus Callilepis DC. (5)
- Genus Zoutpansbergia Hutch. accepted as Callilepis DC.
- Subfamily Baccharidoideae Burmeist. accepted as Asteroideae (Cass.) Lindl.
- Subfamily Barnadesioideae (Benth. & Hook.) K.Bremer & R.K.Jansen accepted as Barnadesioideae (D.Don) Bremer & Jansen
- Subfamily Barnadesioideae (D.Don) Bremer & Jansen (88)
- Subfamily Carduoideae Cass. ex Sweet (3 634)
- Subfamily Cichorioideae Chevall. (6 817)
- Subfamily Corymbioideae Panero & V.A.Funk (10)
- Subfamily Dicomoideae S. Ortiz (113)
- Subfamily Famatinanthoideae S.E.Freire, Ariza & Panero (1)
- Subfamily Gochnatioideae (Benth. & Hook.f.) Panero & V.A.Funk (103)
- Subfamily Gymnarrhenoideae Panero & V.A.Funk (2)
- Subfamily Hecastocleidoideae Panero & V.A.Funk (1)
- Subfamily Lactucoideae (Cass.) Lindl. accepted as Cichorioideae Chevall.
- Subfamily Lactucoideae Solbrig accepted as Cichorioideae Chevall.
- Subfamily Mutisioideae (Cass.) Lindl. (632)
- Subfamily Pertyoideae Panero & V.A.Funk (99)
- Subfamily Stifftioideae (D.Don) Panero (45)
- Subfamily Vernonioideae B.L.Turner ex R.K.Jansen & Stuessy accepted as Vernonioideae Lindl.
- Subfamily Vernonioideae Lindl. (2 357)
- Subfamily Wunderlichioideae Panero & V.A.Funk (42)
- Genus ×Anthisma
- Genus ×Anthocephalum
- Genus ×Chrysaboltonia
- Genus Absynthium G.Gaertn., B.Mey. & Scherb.
- Genus Acanthosonchus Don ex Hoffm.
- Genus Acarphaea Harv., Gray & ex.A.Gray
- Genus Achyrobaccharis Sch.Bip. ex Walp.
- Genus Achyrocoma Post & Kuntze
- Genus Achyrophorus Vaill. accepted as Hypochaeris L. (4)
- Genus Achyrostephus Kunze ex Rchb.
- Genus Acrolinium Engl.
- Genus Actispermum Raf.
- Genus Adenochaena Steud.
- Genus Adenochaena DC.
- Genus Adenoselen Spach
- Genus Aetheorrhiza Rchb.
- Genus Agalma Steud.
- Genus Aganippea Moc. ex Sessé ex DC. accepted as Jaegeria Kunth
- Genus Agathea Endl.
- Genus Agathomeris Laun.
- Genus Ageratiopsis Sch.Bip. ex Benth. accepted as Ageratina Spach
- Genus Aglaodendron J.Rémy
- Genus Agnesia Zuloaga & Judz.
- Genus Ailotheca Hemsl.
- Genus Aimorra Raf.
- Genus Ainsliea Kuntze
- Genus Alcinia Kunth
- Genus Aliconia Herrera
- Genus Allendea La Llave & Lex. accepted as Liabum Adans.
- Genus Alloeospermum Spreng.
- Genus Alloizonium Walp.
- Genus Aloiozonium Lindl.
- Genus Alymnia Neck. ex Spach
- Genus Amblycarpum Lem.
- Genus Amblyopelis Steud.
- Genus Ambraria Cruse
- Genus Ammanthus Boiss. & Heldr.
- Genus Amoleiachyris Sch.Bip.
- Genus Amphipappus Torr. & A.Gray
- Genus Anactis (Cass. ex DC.) Spach
- Genus Andriala Decne.
- Genus Andromachia Humb.
- Genus Anemonospermos Möhring
- Genus Anemonospermum Comm. ex Steud.
- Genus Anisorhamphus Endl.
- Genus Anisorrhamphus Rchb.
- Genus Anonymos Walter
- Genus Anthe-matricaria Geisenh. ex Domin
- Genus Anthemi-matricaria P.Fourn.
- Genus Anthochytrum Rchb. accepted as Crepis L.
- Genus Anticona E.Linares, J.Campos & A.Galán
- Genus Antitrixia Decaisne
- Genus Aplochlamis Steud.
- Genus Aptilon Raf.
- Genus Aquilula G.L.Nesom
- Genus Arachnopogon Berg ex Haberl
- Genus Archaetogeron Greenm.
- Genus Archanthemis Lo Presti & Oberpr.
- Genus Arctotheca Wendl.
- Genus Argyranthus Neck.
- Genus Argyrocome Breyne
- Genus Arnicula Kuntze
- Genus Arraschkoolia Sch.Bip. ex Hochst.
- Genus Arthemisia Neck.
- Genus Artimisia Roxb.
- Genus Asaemia Harv. ex Benth.
- Genus Ascaridia Rchb.
- Genus Aschenbornia Schauer accepted as Calea L.
- Genus Asiris Anonymous
- Genus Astartoseris N.Kilian, Hand, Hadjik., Christodoulou & Bou Dagh.-Kharr.
- Genus Asterago Everett
- Genus Asteridia N.T.Burb.
- Genus Asterigeron Tzvelev
- Genus Asteriscus Siegesb.
- Genus Asteromaea DC.
- Genus Athalmus Neck.
- Genus Atheolaena Rchb.
- Genus Atractylia Rchb.
- Genus Attractilis Hall. ex Scop.
- Genus Aucheria Steud.
- Genus Autunesia O.Hoffm.
- Genus Balladonia P.S.Short (1)
- Genus Barattia A.Gray & Engelm.
- Genus Barbeya Albov
- Genus Barckhausenia Menke
- Genus Barkhusenia Hoppe
- Genus Barrattia A.Gray & Engelm. ex A.Gray accepted as Simsia Pers.
- Genus Barroetia Post & Kuntze
- Genus Bartolia Adans. accepted as Tridax L.
- Genus Bastera J.F.Gmel.
- Genus Bastia Steud.
- Genus Behrinia Sieber ex Steud.
- Genus Bellidiastrum Vaill.
- Genus Bellidistrum Rchb.
- Genus Bembecodium Lindl.
- Genus Bennetia DC.
- Genus Berarda "Vill."St-Lager
- Genus Berckheya Pers.
- Genus Berinia Brignol.
- Genus Bernardia Endl.
- Genus Bertholetia Rchb.
- Genus Bertilia Cron
- Genus Bethencourtia Choisy
- Genus Binectaria Forssk.
- Genus Bizanilla J.Rémy
- Genus Blanchea Boiss.
- Genus Bojera Steud.
- Genus Bowmannia Gardner accepted as Trixis P.Browne
- Genus Brachioglottis Desportes
- Genus Brachyachaenium Baker accepted as Dicoma Cass.
- Genus Brachycladus Wittstein
- Genus Brachyglottis Forst.
- Genus Brachyoglotis Lam.
- Genus Brachyoglottis Scop.
- Genus Brachyrrhamphus Wittstein
- Genus Bracteantha Anderb.
- Genus Breteuillia Buc'hoz
- Genus Breteuillia Buc'hoz ex DC.
- Genus Buphthalmum Mill.
- Genus Cabralia F. von Paula von Schrank
- Genus Cacalia Burm.
- Genus Calendella Kuntze
- Genus Calimeris Nees
- Genus Callias Cass.
- Genus Calophthalmum Rchb.
- Genus Caltha Tourn. ex Adans.
- Genus Calycosorus Endl.
- Genus Calymnandra Lindl.
- Genus Campylochinium Endl.
- Genus Caputia B.Nord. & Pelser
- Genus Carelia Fabr. accepted as Ageratum L.
- Genus Carelia Möhring
- Genus Carelia Cav.
- Genus Carnutia Baker accepted as Melampodium L.
- Genus Carpezium Gouan
- Genus Catanance St.-Lag.
- Genus Catyona Lindl.
- Genus Centroclinion Orb.
- Genus Cephalopterum T.Post & Kuntze
- Genus Ceratogyna T.Post & Kuntze
- Genus Cereopsis Blanco
- Genus Cervana Endl.
- Genus Chaenolobus Small
- Genus Chaetantera Less.
- Genus Chaethymenia Endl.
- Genus Chaetophora Nutt. ex DC.
- Genus Chaetophora Schrank
- Genus Chakiatella DC.
- Genus Chalarium Poit. ex DC.
- Genus Chamaemelum Adans.
- Genus Chamissomenia Kuntze accepted as Schlechtendalia Less.
- Genus Chaptalia Royle
- Genus Chareis N.T.Burb.
- Genus Chersodoma Phil. & Cabrera
- Genus Chicorium Dumort.
- Genus Childsia Childs
- Genus Chilodia R.Br. accepted as Wulffia Neck.
- Genus Chiroloma T.Post & Kuntze
- Genus Chlaotrachelus Hook.f.
- Genus Chone Dulac
- Genus Chrisanthemum Neck. accepted as Chrysanthemum L.
- Genus Chrysaboltonia Arends
- Genus Chrysanthemoides Tourn. ex Medik.
- Genus Chrysocome St.-Lag.
- Genus Chrysogonum L. & F.Br.
- Genus Chrysopelta Tausch
- Genus Claotrachelus Zoll. & Moritz ex Zoll. accepted as Vernonia Schreb.
- Genus Clariona Spreng.
- Genus Clarionea Cass. accepted as Perezia Lag.
- Genus Clarionia D.Don accepted as Perezia Lag.
- Genus Cleistanthium Kunze
- Genus Cleithria Steud.
- Genus Clomenolepis Cass.
- Genus Cnenamum Tausch
- Genus Coelestina Hill
- Genus Coelestinia Endl.
- Genus Coenotus Benth. & Hook.f.
- Genus Colonnea Endl.
- Genus Colycea Fern.Casas & Susanna accepted as Centaurea L.
- Genus Conisa Desf. ex Steud.
- Genus Coniza Neck.
- Genus Conopsis Nutt. ex Less. accepted as Coreopsis L.
- Genus Conysa Adans.
- Genus Conysa Burm.f.
- Genus Conyza Hill
- Genus Conyzella Fabric. accepted as Conyza Less.
- Genus Conyzoides Tourn. ex DC.
- Genus Coriopsis Post & Kuntze
- Genus Coronocarpus Schumach.
- Genus Cosmus Pers. accepted as Cosmos Cav. (1)
- Genus Cotyla Kuntze & Post accepted as Cotula Tourn. ex L.
- Genus Covola Neck. ex Raf.
- Genus Cremocephalium Miq.
- Genus Crepidospermum Benth. & Hook.f.
- Genus Criscianthus Grossi & J.N.Nakaj.
- Genus Crossocephalum Britten
- Genus Crossolepsis N.T.Burb.
- Genus Cryptodia Sch.Bip.
- Genus Cryptopetalum Cass. accepted as Pectis L.
- Genus Cryptopetalum DC.
- Genus Ctenosperma F.Muell. ex Pfeiff.
- Genus Culcitum N.T.Burb.
- Genus Cupidone Lemaire
- Genus Cyclolepsis Endl.
- Genus Cyclopis Guill.
- Genus Cylindrachne Rchb.
- Genus Cyrethrum Boiss.
- Genus Dalea P.Browne accepted as Critonia P.Browne
- Genus Damatras Rchb.
- Genus Damatrias Rchb.
- Genus Delilea Kuntze
- Genus Delwiensia W.A.Weber & R.C.Wittmann
- Genus Dendrocacalia (Nakai) Nakai
- Genus Dendroviguiera E.E.Schill. & Panero
- Genus Deneckia Sch.Bip.
- Genus Denekea Dinter
- Genus Denneckia Steud.
- Genus Desmocephalus Benth. & Hook.f.
- Genus Dewildemania O.Hoffm. ex De Wild.
- Genus Diaspanthus Kitam.
- Genus Diatonta Walp. accepted as Bidens L.
- Genus Diatosperma Mueller Hal.
- Genus Diatosperma Müll.Berol.
- Genus Dichaeta Sch.Bip. accepted as Macvaughiella R.M.King & H.Rob.
- Genus Dicrocephala Royle
- Genus Diospermum Hook.f.
- Genus Diotis Schreb.
- Genus Diplopapus Raf.
- Genus Diplostylis Sond.
- Genus Diplothria Walp.
- Genus Disynanthes Rchb.
- Genus Disynapheia Steud.
- Genus Dithrichum DC.
- Genus Dolicholasium Spreng.
- Genus Dolicotheca Benth. & Hook.f.
- Genus Doria Adans.
- Genus Doroboea DC.
- Genus Dracopsis Cass. accepted as Rudbeckia L.
- Genus Duguldea Meisn.
- Genus Duhaldia Sch.Bip.
- Genus Dysinanthus Raf. ex DC.
- Genus Dysodea Borkh. accepted as Crepis L.
- Genus Dysodia DC.
- Genus Dysodia Spreng.
- Genus Ecliptica Rumph.
- Genus Edwardsia Endl.
- Genus Eizaguirrea J.Rémy
- Genus Electranthera Mesfin, D.J.Crawford & Pruski
- Genus Eleutheranthera Poit. ex Bosc
- Genus Elvina Steud.
- Genus Emelia Wight
- Genus Enchelya Lem.
- Genus Enchydra F.Muell.
- Genus Engelmannia Torr. & A.Gray
- Genus Englemannia A.Gray & ex.Nutt.
- Genus Enula Neck.
- Genus Epalthes Walp.
- Genus Epilasia Benth. & Hook.f.
- Genus Epilatoria Comm. ex Steud.
- Genus Epilepsis Lindl.
- Genus Erechthites Less.
- Genus Ericentrodea Blake, Sherff & Sherff
- Genus Eriocarpha Cass. accepted as Montanoa Cerv.
- Genus Erioclepis Fourr.
- Genus Eriocoryna Steud.
- Genus Erytheremia Endl.
- Genus Espletia Steud.
- Genus Eualcida Hemsl.
- Genus Eucalia Raeusch.
- Genus Eupatoriophalacron Adans.
- Genus Euphrosine Endl.
- Genus Euphrosinia Rchb.
- Genus Eurybia (Cass.) Cass. (1)
- Genus Euthamia Elliott
- Genus Eyselia Reichb. accepted as Egletes Cass.
- Genus Faberia Hemsl. ex Forb. & Hemsl.
- Genus Feea Kuntze
- Genus Filfia Holub
- Genus Fivaldia Walp.
- Genus Fleurotia Rchb.
- Genus Fornea Steud.
- Genus Frageria Delile ex Steud.
- Genus Frankia Steud. ex Steud.
- Genus Frankoeria Steud.
- Genus Freemannia Steud.
- Genus Frivaldzkia Rchb.
- Genus Gaillarda St.-Lag.
- Genus Gaillardia Fouger.: Biddulph
- Genus Galactella Raf.
- Genus Galardia Lam.
- Genus Galasia W.D.J.Koch
- Genus Galinsogaea Himpel accepted as Galinsoga Ruiz & Pav.
- Genus Galinsogaea Zucc.
- Genus Galinsogea Willd. accepted as Galinsoga Ruiz & Pav.
- Genus Galinsoja Roth accepted as Galinsoga Ruiz & Pav.
- Genus Galinzoga Dumort.
- Genus Galisongea Willd.
- Genus Gallinsoga St.Hil. accepted as Galinsoga Ruiz & Pav.
- Genus Gallinsoga J.St.-Hil.
- Genus Gamazygis Pritz.
- Genus Garaleum Sch.Bip.
- Genus Garcillasoa Post & Kuntze
- Genus Gareilassa Walp.
- Genus Garulium Bartl.
- Genus Gazaniopsis C.Huber
- Genus Gazzania
- Genus Geblera Kitag. accepted as Crepidifolium Sennikov
- Genus Geigera Less.
- Genus Gemmaria Noronha
- Genus Geracium Mössler accepted as Crepis L.
- Genus Gerbera Gronov.
- Genus Gerbera Cass.
- Genus Gerberia Cass.
- Genus Ginura Vidal y Soler
- Genus Ginura S.Vidal
- Genus Gnaphalium Adans.
- Genus Gnaphalodes Tourn. ex Adans.
- Genus Golionema "S.Wats." ex O.Hoffm.
- Genus Gomesia La Llave
- Genus Gomezia Benth. & Hook.f.
- Genus Gonzalezia E.E.Schill. & Panero
- Genus Gortera Hill
- Genus Grammartheon Rchb.
- Genus Grantia Griff.
- Genus Greenmaniella Sharp
- Genus Guandiola Steud.
- Genus Guardiola Cerv. ex Bonpl.
- Genus Guntheria Benth. & Hook.f.
- Genus Guzmannia F.Phil.
- Genus Gymnarrhea Steud.
- Genus Gymnema Endl.
- Genus Gymnoloma Ker Gawl.
- Genus Gymnostyles Raf.
- Genus Gymnoxis Steud.
- Genus Gymostyles Willd.
- Genus Gyneteria Spreng.
- Genus Gynoxis Rchb.
- Genus Haberlea Pohl ex Baker
- Genus Hacub Boehm.
- Genus Haegiela P.S.Short
- Genus Haenslera Steud.
- Genus Hainanecio Y.Liu & Q.E.Yang
- Genus Halea L. accepted as Eupatorium Tourn. ex L.
- Genus Hamalium Hemsl.
- Genus Hapalochlamys Kuntze
- Genus Hapalochlamys Rchb.
- Genus Hapalostephium D.Don accepted as Crepis L.
- Genus Hapalostephium D.Don ex Sweet
- Genus Hapalus Endl.
- Genus Haplopappus Endl.
- Genus Haradjania Rech.f.
- Genus Harpachaena Bunge accepted as Acanthocephalus Kar. & Kir.
- Genus Harpalyce D.Don
- Genus Harpocarpus Endl. accepted as Acanthocephalus Kar. & Kir.
- Genus Harrisonia Neck.
- Genus Hartwrightia A.Gray
- Genus Havanella Kuntze
- Genus Haxtonia Caley ex G.Don
- Genus Hecatactis F.Muell.
- Genus Hectorea DC.
- Genus Hedraiophyllum Less. ex Steud.
- Genus Hedypnois Schreb.
- Genus Heiseria E.E.Schill. & Panero
- Genus Helemonium Steud.
- Genus Heleneum Buckley
- Genus Helenia Mill.
- Genus Helenia Zinn
- Genus Heleniastrum Mill.
- Genus Heleniastrum Kuntze
- Genus Helenomoium Willd. ex DC. accepted as Heliopsis Pers.
- Genus Helianthemum Gray
- Genus Helichryson
- Genus Helicta Less.
- Genus Heliochroa A.Gray
- Genus Helipteron St.-Lag.
- Genus Helmentia J.St.-Hil.
- Genus Helminta Willd.
- Genus Helminthia DC.
- Genus Helminthion St.-Lag.
- Genus Helminthoteca Vaill. ex Juss.
- Genus Helminthotheca Vaill. ex Boehm.
- Genus Heloseris Rchb. ex Steud.
- Genus Hemilepis Schltdl. accepted as Leontodon L.
- Genus Hemilepis Kunze
- Genus Hemiptilium A.Gray accepted as Stephanomeria Nutt.
- Genus Hemolepis Hort. ex E.Vilm.
- Genus Henanthus Less
- Genus Henslera Rchb.
- Genus Heocarphus Phil.
- Genus Heraclea Hill
- Genus Herbichia Zaw.
- Genus Herbichia Zaw. ex Guill.
- Genus Herotium Steud.
- Genus Hersilea Klotzsch
- Genus Hertia Neck.
- Genus Hesperoseris Skottsb. accepted as Dendroseris D.Don
- Genus Heteracantha Link ex Steud.
- Genus Heteracea Steud.
- Genus Heteranthus Bonpl. ex Cass. accepted as Perezia Lag.
- Genus Heterodonta Nutt. ex Benth. & Hook.f.
- Genus Heterolaena Sch.Bip. ex Benth. & Hook.f. accepted as Chromolaena DC.
- Genus Heteromorpha Viv. ex Coss.
- Genus Heteropleura Sch.Bip. accepted as Hieracium Tourn. ex L.
- Genus Heterorachis Sch.Bip.
- Genus Heterospermum Willd. accepted as Heterosperma Cav.
- Genus Hieraceum Hoppe
- Genus Hierachium Hill
- Genus Hieraciastrum Heist. ex Fabr.
- Genus Hieracioides Fabr.
- Genus Hieracion St.-Lag.
- Genus Hieracum
- Genus Hierapicra Kuntze
- Genus Hingcha Roxb.
- Genus Hinghstonia Steud.
- Genus Hinterhubera Sch.Bip. accepted as Chrysanthellum Rich.
- Genus Hinterhubera Sch.Bip. ex Hochst. accepted as Chrysanthellum Rich.
- Genus Hinterhubera Sch.Bip.
- Genus Hiorthia Neck.
- Genus Hiortia Juss.
- Genus Hipochaeris Nocca
- Genus Hipochoeris Neck.
- Genus Hippia L.f. accepted as Cotula Tourn. ex L.
- Genus Hippophaestum Gray
- Genus Hisutua
- Genus Hochstettera Spach
- Genus Hohenwartha Vest
- Genus Homalanthus Wittst.
- Genus Homalotes Endl.
- Genus Homalotheca Rchb.
- Genus Homostylium Nees
- Genus Hookia Neck.
- Genus Hoorebeckia Steud.
- Genus Hoorebekia Corneliss.
- Genus Hopkirkia Spreng. accepted as Salmea DC.
- Genus Hopkirkia DC. accepted as Schkuhria Roth.
- Genus Huenefeldia Walp.
- Genus Hunefeldia Lindl.
- Genus Hunteria ex DC.
- Genus Hyalospermum Benth. & Hook.f.
- Genus Hylethale Link
- Genus Hymenomena Less.
- Genus Hymenostephium Benth. & Hook.f.
- Genus Hypochoeris L.
- Genus Hyppochaeris Biv.
- Genus Hysteronica Endl.
- Genus Hysterophorus Adans.
- Genus Ichthyothera [Klotzsch & ex]
- Genus Ichtyothere DC.
- Genus Icthyothere Baker
- Genus Ictinus Cass. accepted as Gorteria L.
- Genus Idianthes Desv. accepted as Crepis L.
- Genus Idicium Neck.
- Genus Indoixeris Kitam.
- Genus Infantea Remy accepted as Amblyopappus Hook. & Arn.
- Genus Ingenhousia Kuntze
- Genus Ingenhousia Steud.
- Genus Ingenhouzia Bertero ex DC.
- Genus Inthybus Herder
- Genus Intybellia Monn.
- Genus Intybus Fr. accepted as Crepis L.
- Genus Intybus Zinn
- Genus Inyonia M.E.Jones
- Genus Iocaste E.Mey. ex DC.
- Genus Iodocephalopsis S. Bunwong & H.Rob. (1)
- Genus Iodocephalopsis Bunwong & H.Rob.
- Genus Iranoaster Kaz.Osaloo, Farhani & Mozaff. (1)
- Genus Isanthus DC. accepted as Perezia Lag.
- Genus Ischnaea
- Genus Ismaria Raf. accepted as Brickellia Elliott
- Genus Isocarpha Less. accepted as Ageratum L.
- Genus Isomeria D.Don ex DC.
- Genus Iteria Hort.
- Genus Ixauchenus Cass. accepted as Lagenophora Cass.
- Genus Ixiauchenus Less.
- Genus Ixine Hill
- Genus Ixiochlamys F.Muell. ex Sond.
- Genus Jacobaea Burm.
- Genus Jacobaea Burm. ex Kuntze
- Genus Jacobea Thunb.
- Genus Jacosta DC.
- Genus Jacquemontia Bél.
- Genus Jalambica Raf.
- Genus Jamesia Nees
- Genus Japonicalia C.Ren & Q.E.Yang
- Genus Jardinia Sch.Bip.
- Genus Jeffreya Cabrera
- Genus Jeffreyzia
- Genus Jessenia F.Muell. ex Sond.
- Genus Jobaphes Phil. accepted as Aphyllocladus Wedd. (1)
- Genus Jocaste Meisn.
- Genus junceum (Poljakov) Filatova
- Genus Kahiria Forssk.
- Genus Kalimares Raf.
- Genus Kallophyllon Pohl ex Baker
- Genus Karthemia Sch.Bip.
- Genus Keerlia A.Gray & Engelm.
- Genus Kegelia Sch.Bip. accepted as Eleutheranthera Poit.
- Genus Keringa Raf.
- Genus Kiliana Sch.Bip. ex Hochst.
- Genus Kiliania Sch.Bip. ex Benth. & Hook.f.
- Genus Kitamuraea Rauschert accepted as Miyamayomena Kitam.
- Genus Kitamuraster Soják accepted as Miyamayomena Kitam.
- Genus Kleina Cothen.
- Genus Klenzea Sch.Bip. ex Steud.
- Genus Klenzea Sch.Bip. ex Hochst.
- Genus Koanophyllon Arruda ex H.Kost.
- Genus Koanophyllum Arruda ex H.Kost.
- Genus Koechlea Endl.
- Genus Kralikia Sch.Bip.
- Genus Kraussia Sch.Bip.
- Genus Krenamon Adans.
- Genus Kuhniodes Post & Kuntze
- Genus Kyberia Neck.
- Genus Kymapleura (Nutt.) Nutt. accepted as Agoseris Raf.
- Genus Kyrstenia Neck. ex Greene accepted as Ageratina Spach
- Genus Kyrstenia Neck. accepted as Ageratina Spach
- Genus Lachanostachys Endl.
- Genus Lachnothalamus F.Muell.
- Genus Laciala Kuntze
- Genus Laciniaria Kuntze
- Genus Laciniaria Hill
- Genus Lactucopsis Sch.Bip. ex Vis.
- Genus Laenecia Sch.Bip. ex Walp.
- Genus Laenecia Sch.Bip.
- Genus Lagaseris
- Genus Lagenifera Cass.
- Genus Lagerophora Domin
- Genus Laggera Sch.Bip. ex Walp. accepted as Cotula Tourn. ex L.
- Genus Laggera Sch.Bip. ex Benth.
- Genus Lagoseris Hoffmanns. ex Hoffmanns. & Link
- Genus Lagothamnus Nutt.
- Genus Lalda Bubani
- Genus Lamprochlaena F.Muell.
- Genus Lampsana Mill.
- Genus Lampsana Rupp.
- Genus Lancisia Ponted. ex Adans.
- Genus Langsdorffia Willd. ex Steud.
- Genus Lapeirousia Thunb.
- Genus Lapeyrousia Thunb.
- Genus Lapeyrousia Spreng.
- Genus Lapsyoungia Hiyama
- Genus Lasallea Greene accepted as Aster L.
- Genus Lasianthea Endl.
- Genus Lasiocarphus Pohl ex Baker
- Genus Lasiophyton Hook. & Arn.
- Genus Lasiopus D.Don
- Genus Lasiorhiza Kuntze
- Genus Lasiospermum Fisch.
- Genus Launaea Auct. accepted as Launaea Cass.
- Genus Launaya Kuntze
- Genus Launaya Rchb.
- Genus Launea Endl.
- Genus Laurencellia Neumann
- Genus Laurentia Steud. accepted as Sanvitalia Lam.
- Genus Lavidia Phil.
- Genus Laxanon Raf.
- Genus Laxmannia J.R.Forst. & G.Forst. accepted as Petrobium R.Br.
- Genus Laxmannia Forst.
- Genus Laxopetalum Pohl ex Baker
- Genus Laya Endl.
- Genus Lebianthus K.Schum.
- Genus Leeria Steud.
- Genus Leiodon Shuttlew. ex Sherff
- Genus Lejica Hill ex DC. accepted as Zinnia L.
- Genus Leo Phil. accepted as Helogyne Nutt.
- Genus Leontodon Adans.
- Genus Leontondon Robin
- Genus Leontonix Heynh.
- Genus Leontopodion St.-Lag.
- Genus Lepicline Less.
- Genus Lepidonema Fisch. & C.A.Mey.
- Genus Lepidopappus Moc. & Sessé ex DC.
- Genus Lepidophorum Neck. ex DC.
- Genus Lepidopogon Tausch
- Genus Lepidoseris (H. G. L. Reichenbach) Fourr.
- Genus Leptalea D.Don ex Hook. & Arn.
- Genus Leptica E.Mey. ex DC.
- Genus Leptocarpha Endl.
- Genus Leptoclinium Benth.
- Genus Leptorhynchus F.Muell.
- Genus Leptotis Hoffmanns.
- Genus Lerchia Rchb.
- Genus Lestadia Spach accepted as Laestadia Kunth ex Less.
- Genus Lestibodea Neck.
- Genus Lestibudaea Juss.
- Genus Lettowia H.Rob. & Skvarla
- Genus Leucaeria DC.
- Genus Leucampyx A.Gray accepted as Hymenopappus L'Hér.
- Genus Leucanthemum Burm.
- Genus Leucanthemum Burm. ex Kuntze
- Genus Leuceria Lag. accepted as Leucheria Lag.
- Genus Leuchaeria Less.
- Genus Leucoglossum S.Imai
- Genus Leucophyton Less. accepted as Leucophyta R.Br.
- Genus Leucopodon Benth. & Hook.f.
- Genus Leucopodum Gardner accepted as Chevreulia Cass.
- Genus Leucoseris Fourr.
- Genus Leucostemma D.Don
- Genus Leuctodon Auct.
- Genus Leukeria Endl.
- Genus Leyseria Neck.
- Genus Liathris Müll.Berol.
- Genus Libinhania N.Kilian, Galbany, Oberpr. & A.G.Mill.
- Genus Lidbecka Cothen.
- Genus Lidbekia Spreng.
- Genus Lieberkuehna Rchb.
- Genus Lieberkuehnia Rchb.
- Genus Lieberkuhnia Less.
- Genus Limnocrepis Fourr. accepted as Crepis L.
- Genus Limnogenneton Sch.Bip. accepted as Micractis DC.
- Genus Limnoseris 'Peterm.'
- Genus Limonoseris Peterm. accepted as Crepis L.
- Genus Lioydia Neck.
- Genus Lioydia Neck. ex Raf.
- Genus Lipochaete Benth.
- Genus Lipotriche Less. accepted as Lipochaeta DC.
- Genus Lloydia Benth. & Hook.f.
- Genus Locheria Neck.
- Genus Lomanthus B.Nord. & Pelser
- Genus Lomaxeta Raf.
- Genus Lophactis Raf.
- Genus Lophoclinium Endl.
- Genus Lophoptilon Gagnep.
- Genus Lorantea Steud.
- Genus Loranthea Steud.
- Genus Lorentia Sweet
- Genus Luthera Sch.Bip.
- Genus Lycotis Hoffmanns.
- Genus Lyonetia Willk.
- Genus Lyonettia Endl.
- Genus Macrocephalus Lindl.
- Genus Macropertya Honda
- Genus Macrorrhyncus Brongn.
- Genus Madacarpus Wight
- Genus Madaraglossa Hook.
- Genus Madea Sol. ex DC.
- Genus Maecharanthera Pritz.
- Genus Mahometa DC.
- Genus Maja Wedd.
- Genus Malacocephalus Tausch
- Genus Mallinoa J. Coulter accepted as Ageratina Spach
- Genus Mandonia Sch.Bip. accepted as Hieracium Tourn. ex L.
- Genus Margacola Buckley
- Genus Margaritaria Opiz
- Genus Mariacantha Bubani
- Genus Marizia Gand.
- Genus Marschallia Bartl.
- Genus Martrasia Lag. accepted as Jungia L.f.
- Genus Maruta (Cass.) Cass.
- Genus Mastigophorus Cass. accepted as Nassauvia Comm. ex Juss.
- Genus Matamoria La Llave
- Genus Matricaria Hall. ex Scop.
- Genus Matricarioides (Less.) Spach
- Genus Mausolea Bunge ex Podlech
- Genus Medicasia Willk.
- Genus Medicula Medik.
- Genus Medicusia Moench accepted as Picris L.
- Genus Meistera Cothen.
- Genus Meisteria Scop. accepted as Pacourina Aubl.
- Genus Melanenthera Link
- Genus Melissopsis Sch.Bip. ex Baker
- Genus Menomphalus Pomel
- Genus Metagnanthus Endl.
- Genus Metagnathus Benth. & Hook.f.
- Genus Metaxanthus Walp.
- Genus Metazanthus Meyen
- Genus Meteorina Cass. accepted as Dimorphotheca Vaill. ex Moench
- Genus Meyerafra Kuntze
- Genus Michauxia Neck.
- Genus Micrauchenia Froel.
- Genus Microcoecia Hook. accepted as Delilia Spreng.
- Genus Microcoecia Hook.f.
- Genus Microderis D.Don ex Gand.
- Genus Microlecana Sch.Bip. accepted as Bidens L.
- Genus Microlecane Sch.Bip. accepted as Bidens L.
- Genus Microlonchoides P.Candargy
- Genus Microlophopsis Czerep.
- Genus Micropappus (Sch.Bip.) C.F.Baker
- Genus Microrynchus Sch.Bip.
- Genus Miegia Neck.
- Genus Millefolium Tourn. ex Adans.
- Genus Millefolium Hill
- Genus Millera St.-Lag.
- Genus Millera Cothen.
- Genus Millottia Stapf
- Genus Mimela Phil. accepted as Leucheria Lag.
- Genus Minuriella Tate
- Genus Miradoria Sch.Bip. ex Benth. & Hook.f.
- Genus Mischanthus Coss.
- Genus Mitina Adans.
- Genus Mnesitheon Spreng.
- Genus Moehnia Neck.
- Genus Moerkensteinia Opiz
- Genus Molpadia (Cass.) Cass. accepted as Telekia Baumg.
- Genus Monilifera Adans.
- Genus Monophalacrus Cass. accepted as Tessaria Ruiz & Pav.
- Genus Montagnaea DC. accepted as Montanoa Cerv.
- Genus Montagnea Seem.
- Genus Moritzia Sch.Bip. ex Benth. & Hook.f.
- Genus Morna Lindl.
- Genus Moronoa Hort. ex Kunze
- Genus Morrenia Kunze accepted as Mikania Willd.
- Genus Moscaria Pers.
- Genus Moschifera Molina
- Genus Mosigia Spreng.
- Genus Munrozia Steud.
- Genus Mutisa Cothen.
- Genus Myconia Vent.
- Genus Mycropus Gouan
- Genus Mycroseris Hook. & Arn.
- Genus Myctanthes Raf.
- Genus Myoseris Link accepted as Crepis L.
- Genus Myriogyne Less. accepted as Centipeda Lour.
- Genus Nacrea A.Nelson
- Genus Nahuatlea V.A.Funk
- Genus Namibithamnus H.Rob., Skvarla & V.A.Funk
- Genus Narbalia Raf.
- Genus Nassavia Spreng.
- Genus Nassawia Lag.
- Genus Nassovia Batsch
- Genus Neactelis Raf.
- Genus Nematopus A.Gray
- Genus Nemolepis E.Vilm.
- Genus Neobartlettia R.M.King & H.Rob. accepted as Bartlettina R.M.King & H.Rob.
- Genus Neo-taraxacum Y.R.Ling & X.D.Sun
- Genus Neurelmis Raf.
- Genus Neurochlaena Less.
- Genus Newtonia O.Hoffm.
- Genus Nicolettia Benth. & Hook.f.
- Genus Niebuhria Neck. ex Britton accepted as Wedelia Jacq.
- Genus Niebuhria Neck. accepted as Wedelia Jacq.
- Genus Noccaea Kuntze accepted as Lagascea Cav. (1)
- Genus Nothonia Endl.
- Genus Notisia P.S.Short (1)
- Genus Obaejaca (Cass.) Cass. accepted as Senecio L.
- Genus Obeliscaria Cass. accepted as Ratibida Raf.
- Genus Obeliscotheca Vaill. ex Adans. accepted as Rudbeckia L. (1)
- Genus Obelisteca Raf. accepted as Ratibida Raf.
- Genus Oboejaca Steud.
- Genus Ocneron Raf.
- Genus Odoglossa Raf.
- Genus Odontocarpha Poepp. ex DC. accepted as Gutierrezia Lag.
- Genus Odontophyllum (Less.) Spach
- Genus Odontoptera Cass. accepted as Arctotis L.
- Genus Oederia DC.
- Genus Oegroe Phil.
- Genus Ogcerostylus Cass. accepted as Siloxerus Labill.
- Genus Oligaerion Cass.
- Genus Oliganthemum F.Muell. accepted as Pluchea Cass.
- Genus Oligocarpha Cass. accepted as Brachylaena R.Br.
- Genus Oligodorella Turcz.
- Genus Oligodorum Spach
- Genus Oligoglossa DC.
- Genus Oligotheca
- Genus Onopix Raf.
- Genus Onopyxos Spreng.
- Genus Onopyxus Bubani
- Genus Ooclinium DC. accepted as Praxelis Cass.
- Genus Ophyrosporus Baker
- Genus Opicrina Raf.
- Genus Oporina Less.
- Genus Oporinea W.H.Baxter
- Genus Orchaenactis "coville" ex O.Hoffm.
- Genus Oreodoxa
- Genus Oreophila D.Don accepted as Hypochaeris L.
- Genus Oreoseris DC.
- Genus Oresigonia Willd. ex DC. accepted as Senecioneae Cass.
- Genus Oresigonia Willd. ex Less.
- Genus Orestion Raf.
- Genus Oriastrum Poepp. (1)
- Genus Orsina Bertol. accepted as Inula L.
- Genus Osmia Sch.Bip. accepted as Chromolaena DC.
- Genus Osmitiphyllum Sch.Bip.
- Genus Osteiza Steud.
- Genus Oswaldia Cass. accepted as Clibadium F.Allam. ex L.
- Genus Oswaldia Less. accepted as Clibadium F.Allam. ex L.
- Genus Otoglyphis Pomel
- Genus Oxerostylus Steud.
- Genus Oxiphoeria Hort. ex Dum.Cours.
- Genus Oxodon Steud.
- Genus Oxylaena Benth.
- Genus Oxylobus Moc. ex DC.
- Genus Oxyodon DC. accepted as Chaptalia Vent.
- Genus Oxyphaeria Steud.
- Genus Oxypheria DC.
- Genus Oxyphoeria Dum.Cours.
- Genus Oxytripolium Anonymous
- Genus Pachycentron Pomel
- Genus Pachychaeta Sch.Bip. ex Baker
- Genus Pachyderis Cass. accepted as Pteronia L.
- Genus Pachylepis Less. accepted as Crepis L.
- Genus Pachyrhynchus DC. accepted as Lucilia Cass.
- Genus Pachyrynchus Steud.
- Genus Pachysurus Steetz
- Genus Pachythrix Hook.f.
- Genus Pacquerina Cass. ex Sond.
- Genus Paleolaria Cass. accepted as Palafoxia Lag.
- Genus Panargyrum D.Don accepted as Nassauvia Comm. ex Juss.
- Genus Panargyrus Lag.
- Genus Paneroa E.E.Schill.
- Genus Panetia Fenzl
- Genus Paniopsis Raf.
- Genus Panios Adans.
- Genus Paquerina Cass. accepted as Bellis L. (1)
- Genus Paquirea Panero & S.E.Freire
- Genus Parasenaria J.M.H.Shaw
- Genus Parasyncalathium J.W. Zhang, Boufford & H.Sun (1)
- Genus Pardisium Burm.f.
- Genus Parthenopsis Kellogg
- Genus Passacardoa Wild accepted as Pasaccardoa Kuntze
- Genus Pegolletia Less.
- Genus Penanthes Vell.
- Genus Pentanthus Hook. & Arn.
- Genus Pentanthus Less.
- Genus Pentataxis D.Don
- Genus Penthanthus Steud.
- Genus Pentheriella O.Hoffm. & Muschl.
- Genus Pentiphragma Hook.
- Genus Pereuphora Hoffmanns.
- Genus Pereziopsis Coult. accepted as Onoseris Willd.
- Genus Pericallis Webb & Berthel.
- Genus Perimenium Steud.
- Genus Peripleura Clifford & Ludlow
- Genus Peritris Raf.
- Genus Personaria Lam.
- Genus Perymeniopsis Sch.Bip. ex Klatt
- Genus Petalactella N.E.Br. accepted as Ifloga Cass.
- Genus Petalolepis Cass. accepted as Ozothamnus R.Br.
- Genus Petalolepis Less.
- Genus Petasitis Mill.
- Genus Petrantha DC.
- Genus Petrodavisia Holub
- Genus Petrollinia Chiov. accepted as Inula L.
- Genus Petronia Jungh.
- Genus Peurousea Steud.
- Genus Phacellothrix F.Muell. accepted as Helichrysum Mill. (1)
- Genus Phaenopoda Cass. accepted as Podosperma Labill.
- Genus Phaethusia Raf.
- Genus Phaetusa Schreb.
- Genus Phalacroglossum Sch.Bip.
- Genus Phalacromesus Cass. accepted as Tessaria Ruiz & Pav.
- Genus Pharia Steud.
- Genus Phenopus Hook.f.
- Genus Phialis Spreng. accepted as Trichophyllum Nutt.
- Genus Philaginopsis Walp.
- Genus Phoenicopus Spach
- Genus Phoenicoseris (Skottsb.) Skottsb. accepted as Sonchus L.
- Genus Phoenixopus Rchb.
- Genus Phoenocoma G.Don
- Genus Phoenopus Nyman
- Genus Phrenanthes Wigg.
- Genus Phyllactinia Benth.
- Genus Phyllactis Steud.
- Genus Phyllochilium Cabrera accepted as Chiliophyllum Phil.
- Genus Phyllopappus Walp.
- Genus Phyllostelidium Beauverd
- Genus Phyllymena Blume ex Miq.
- Genus Picardenia Steud.
- Genus Picrina Rchb. ex Steud.
- Genus Pietrosia Nyár. accepted as Andryala L.
- Genus Pietrosia Nyár.
- Genus Pilosanthus Steud.
- Genus Pilosella F.W.Schultz & Sch.Bip.
- Genus Pinardia Neck.
- Genus Pinillosia Ossa
- Genus Piptopogon Cass. accepted as Hypochaeris L.
- Genus Piptostemma (D.Don) Spach
- Genus Piptostemum Steud.
- Genus Pirarda Adans.
- Genus Pitchia Auct.
- Genus Plagion St.-Lag.
- Genus Plancia Neck.
- Genus Platzchaeta Sch.Bip.
- Genus Pleocarpus Walp.
- Genus Pluechea Zoll. & Moritzi
- Genus Pluridens Neck.
- Genus Podia Neck.
- Genus Poecilotriche Dulac
- Genus Pogonura DC. ex Lindl.
- Genus Poilania Gagnep.
- Genus Polatherus Raf.
- Genus Poljakanthema Kamelin
- Genus Poloa DC.
- Genus Polyacantha Hill
- Genus Polyachris Walp.
- Genus Polycalymma F.Muell. ex Sond.
- Genus Polycantha Hill
- Genus Polyclados Phil. accepted as Parastrephia Nutt.
- Genus Polymniastrum Small accepted as Smallanthus Mack.
- Genus Polypappus Nutt.
- Genus Polypteris Nutt.
- Genus Polypteris Less. accepted as Gaillardia Foug.
- Genus Ponaea Bubani
- Genus Pontesia Vell. accepted as Riencourtia Cass.
- Genus Portalesia Meyen
- Genus Postia Boiss. & C.I.Blanche
- Genus Praenanthes Hook.
- Genus Prenanthenia Svent.
- Genus Prenanthos St.-Lag.
- Genus Prenantus Raf.
- Genus Prestinaria Sch.Bip. ex Hochst.
- Genus Prianthes Pritz.
- Genus Priestleya ex DC.
- Genus Prionolepis Poepp. & Endl.
- Genus Proselia D.Don
- Genus Protolepis Steud.
- Genus Psanacetum Neck.
- Genus Pseudalomia Zoll. & Moritzi
- Genus Pseudevax DC. ex Steud.
- Genus Pseudoclinium Kuntze
- Genus Pseudoglossanthis Poljakov (1)
- Genus Pseudomatricaria Domin
- Genus Pseudopegolettia H.Rob., Skvarla & V.A.Funk
- Genus Pseudoseris Baill.
- Genus Psilachenia Benth.
- Genus Psilochenia Nutt. accepted as Crepis L.
- Genus Psilochlaena Walp.
- Genus Psilopogon Phil. accepted as Picrosia D.Don
- Genus Psilosanthus Neck.
- Genus Psilothamnus DC.
- Genus Psilothonna E.Mey. ex DC.
- Genus Psora Hill
- Genus Ptarmica Neck.
- Genus Pterigeron A.Gray
- Genus Pternix Hill
- Genus Pternix Raf.
- Genus Pterochaete Boiss.
- Genus Pterocladis Lamb. ex G.Don
- Genus Pteropappus Pritz.
- Genus Pterophora Neck.
- Genus Pterophorus Vaill. ex Adans.
- Genus Pterophyton Cass. accepted as Verbesina L.
- Genus Pteropogon Fenzl
- Genus Pterosenecio Sch.Bip. ex Baker
- Genus Pterostephanus Kellogg
- Genus Ptilepida Raf.
- Genus Ptileris Raf. accepted as Erechtites Raf.
- Genus Ptilocalais Torr. ex Greene accepted as Microseris D.Don
- Genus Ptilophora (Torr. & A.Gray ex Hook.) A.Gray accepted as Microseris D.Don
- Genus Ptiloria Raf. accepted as Stephanomeria Nutt. (1)
- Genus Ptilosia Tausch
- Genus Ptilurus D.Don accepted as Leucheria Lag.
- Genus Publicaria Deflers
- Genus Pulicaria Gaertn. ex Schreb.
- Genus Pulicarioidea Bunwong, Chantar. & S.C.Keeley
- Genus Pumilo Schltdl.
- Genus Pycarda Less.
- Genus Pycnocomon St.-Lag.
- Genus Pycnocomus Hill
- Genus Pyrarda Cass. accepted as Grangea Adans.
- Genus Pyrethraria Pers. ex Steud.
- Genus Pyrethron St.-Lag.
- Genus Pyrethropsis (1)
- Genus Pyrethrum Scop.
- Genus Pyrethrum Hall.
- Genus Pyretrum Burm.
- Genus Pyropsis Hort. ex Fisch., C.A.Mey. & Avé-Lall.
- Genus Pyrrhocoma Wall.
- Genus Pyrrhopappus A.Rich.
- Genus Pythecoseris Spach
- Genus Raillarda Endl.
- Genus Raillardella Benth.
- Genus Railliarda DC.
- Genus Raoulia Hook.f.
- Genus Ratabida Loudon
- Genus Razumovia Spreng.
- Genus Razumovia Spreng. ex Juss.
- Genus Rea Bertero ex Decne. accepted as Dendroseris D.Don
- Genus Reicharda Cothen.
- Genus Reichardia Roth.
- Genus Resinocaulon Lunell
- Genus Rhagadiolus Zinn
- Genus Rhagadiolus Tourn. ex Scop.
- Genus Rhantherium Sch.Bip.
- Genus Rhea Endl.
- Genus Rhigiothamnus (Less.) Spach
- Genus Rhinactina Willd. accepted as Jungia L.f. (2)
- Genus Rhodactinia Benth. & Hook.f.
- Genus Rhyditospermum Walp.
- Genus Rhynchopappus Dulac accepted as Crepis L.
- Genus Rhynchospermum Reinw.
- Genus Ridan Kuntze
- Genus Ridania Kuntze
- Genus Riddelliinae O.Hoffm.
- Genus Roberta St.-Lag.
- Genus Roccardia Neck. ex Raf.
- Genus Roccardia Neck.
- Genus Rodigia Spreng accepted as Crepis L.
- Genus Roebuckia P.S.Short accepted as Brachyscome Cass.
- Genus Roebuckiella P.S.Short
- Genus Rolfinkia Zenker
- Genus Rosaura Noronha
- Genus Rothia Schreb. accepted as Andryala L.
- Genus Rothia Lam. accepted as Hymenopappus L'Hér.
- Genus Rudbecka Cothen.
- Genus Rudbekia Scop.
- Genus Ruthrum Hill
- Genus Rutidochlamys Sond.
- Genus Rytidea Spreng.
- Genus Sabbata Vell.
- Genus Salmia Post & Kuntze
- Genus Salviastrum Heist. ex Fabr.
- Genus Sanhilaria leandr. ex DC.
- Genus Sanrobertia G.L.Nesom
- Genus Santolina Tourn.
- Genus Santonica Griff.
- Genus Sanvitalia L.
- Genus Scalia Sieber ex Sims
- Genus Scaliopsis Walp.
- Genus Scepinia Neck. ex Cass. accepted as Pteronia L.
- Genus Scepinia Neck.
- Genus Schaeffnera Benth. & Hook.f.
- Genus Schaetzelia Walp.
- Genus Schaetzelia Sch.Bip.
- Genus Schaetzellia Sch.Bip.
- Genus Schaffnera Sch.Bip.
- Genus Schawia Cothen.
- Genus Scheuchleria Heynh.
- Genus Schistocarpia Pritz.
- Genus Schkuhria Roth.
- Genus Schlechtendahlia Benth. & Hook.f.
- Genus Schmidtia Moench accepted as Tolpis Adans.
- Genus Schnittspahnia Sch.Bip.
- Genus Schortia Hort. ex E.Vilm.
- Genus Sciadioseris Kunze
- Genus Sciadoseris Müll.Berol.
- Genus Scirrhophorus Turcz.
- Genus Sckuhria Moench
- Genus Sclerobasis Cass. accepted as Senecio L.
- Genus Scleroleima Hook.f.
- Genus Sclerolepis Monnier accepted as Crepis L.
- Genus Sclerolepis Monn.
- Genus Sclerophyllum Gaudin accepted as Crepis L.
- Genus Scolopospermum Hemsl. accepted as Baltimora L.
- Genus Scolymanthus Willd. ex DC. accepted as Perezia Lag.
- Genus Scytala E.Mey. ex DC.
- Genus Sebastiana Benth. & Hook.f. accepted as Chrysanthellum Rich.
- Genus Sebastiania Bertol.
- Genus Selenocera Zipp. ex Span.
- Genus Selenogyne DC.
- Genus Senecillicacalia Kitam.
- Genus Seneciunculus Opiz
- Genus Seneico Hill
- Genus Sericocarpus Greene (1)
- Genus Seridia Juss. accepted as Centaurea L.
- Genus Seriphidium (Besser) Poljakov
- Genus Seruneum Rumph.
- Genus Setachna Dulac
- Genus Seubertia H.C.Watson
- Genus Shawia Forst. (2)
- Genus Sidneya E.E.Schill. & Panero
- Genus Siegesbecka Cothen.
- Genus Siegesbeckia Steud.
- Genus Silphion St.-Lag.
- Genus Silphiosperma Steetz
- Genus Silybon St.-Lag.
- Genus Simblocline DC. accepted as Diplostephium Kunth
- Genus Simlera Bubani
- Genus Sincalia
- Genus Sinclairea Sch.Bip.
- Genus Siphonogyne Cass.
- Genus Sitilias Raf. accepted as Pyrrhopappus DC.
- Genus Skirrhophorus DC. ex Lindl.
- Genus Skirrophorus Müll.Berol.
- Genus Sobreya Pers. accepted as Enydra Lour.
- Genus Sobrya Pers.
- Genus Sogaligna Steud.
- Genus Soldevilla Lag.
- Genus Solidaster Wehrhahn
- Genus Solivaea Cass. accepted as Soliva Ruiz & Pav.
- Genus Sonchidium Pomel accepted as Sonchus L.
- Genus Sonchos St.-Lag.
- Genus Sonchoseris Fourr. accepted as Sonchus L.
- Genus Sonchustenia Svent.
- Genus Sonnea Greene
- Genus Soyera St.-Lag.
- Genus Soyeria Monn.
- Genus Spadactis Cass. accepted as Atractylis L.
- Genus Spadactis Cass. ex Less.
- Genus Spanioptilon Less.
- Genus Spanotrichum E.Mey. ex DC.
- Genus Spermophylla Neck.
- Genus Sphaeranthoides A.Cunn. ex DC.
- Genus Sphaereupatorium Kuntze
- Genus Sphaerocephala Hill
- Genus Sphaerocephalus Kuntze
- Genus Sphaerocephalus Lag. ex DC.
- Genus Sphaerophyllum Auct.
- Genus Spheranthus Hill
- Genus Spilacron Cass. accepted as Centaurea L.
- Genus Spilanthus L.
- Genus Spinoliva G.Sancho, Luebert & Katinas
- Genus Spiralepis D.Don
- Genus Spiridanthus Fenzl
- Genus Sprunira Sch.Bip. ex Hochst.
- Genus Sprunnera Sch.Bip. ex Walp.
- Genus Sprunnera Sch.Bip.
- Genus Staebe Hill
- Genus Stanfieldia Small
- Genus Starkia Juss. ex Steud.
- Genus Stegonotus Cass. accepted as Arctotis L.
- Genus Steiractis Raf.
- Genus Steirocoma (DC.) Rchb.
- Genus Steiroglossa DC.
- Genus Steleocodon Gilli
- Genus Stelmanis Raf.
- Genus Stematella Wedd. ex Sch.Bip. accepted as Galinsoga Ruiz & Pav.
- Genus Stemmatella Wedd. ex Sch.Bip.
- Genus Stemmatella Wedd. ex Benth.
- Genus Stenogyne Cass.
- Genus Stenotheca Monn.
- Genus Stenotopsis Rydb. accepted as Ericameria Nutt.
- Genus Stephania (Kuntze) Kuntze
- Genus Stephanocoma Less.
- Genus Stephanopholis S.F.Blake (1)
- Genus Steriphe Phil.
- Genus Stictophyllum Edgew.
- Genus Stilpnophytum Less. accepted as Athanasia L.
- Genus Stoechas Gueldenst.
- Genus Strabonia DC.
- Genus Streckera Sch.Bip.
- Genus Streptorhamphus Regel
- Genus Strongyloma DC.
- Genus Strongylomopsis Speg.
- Genus Strumarium Raf.
- Genus Stylesia Nutt. accepted as Bahia Lag.
- Genus Stylopappus Nutt. accepted as Agoseris Raf.
- Genus Succisocrepis Fourr. accepted as Crepis L.
- Genus Sulzeria J. J. Roemer & J. A. Schultes
- Genus Susanna E.Phillips
- Genus Swertia All.
- Genus Swertia Boehm.
- Genus Swertya Steud.
- Genus Swinburnia Ewart
- Genus Sycodium Pomel
- Genus Symphipappus Klatt (1)
- Genus Synarthron Benth. & Hook.f.
- Genus Synarthrum Cass. accepted as Senecio L.
- Genus Syncephalanthus Benth. & Hook.f.
- Genus Synchodendron Bojer ex DC.
- Genus Synosma Raf. ex Britton accepted as Hasteola Raf.
- Genus Synosma Raf.
- Genus Tafalla D.Don accepted as Loricaria Wedd.
- Genus Tagetinae Less.
- Genus Taimingasa (Kitam.) C.Ren & Q.E.Yang
- Genus Tamayoa V.M.Badillo
- Genus Tanaxion Raf.
- Genus Taraxacum Weber
- Genus Teichostemma R.Br.
- Genus Telfordia accepted as Ozothamnus R.Br.
- Genus Terana La Llave
- Genus Tessenia Bubani (1)
- Genus Tetracanthus C.Wright ex Griseb.
- Genus Tetralix Hill
- Genus Tetralyx Hill
- Genus Tetrantha Poit. ex DC. accepted as Riencourtia Cass.
- Genus Tetratrichia Dinter
- Genus Thamnoseris F.Phil.
- Genus Thelosperma Post & Kuntze
- Genus Thelythamnos A.Spreng.
- Genus Theophroseris Andrae
- Genus Therogeron DC.
- Genus Therolepta Raf.
- Genus Thespidium F.Muell. ex Benth.
- Genus Thinobia Phil.
- Genus Thlipsocarpus Kunze accepted as Hyoseris L.
- Genus Thouarsia Vent. ex DC.
- Genus Thrica Gray
- Genus Thrincia Roth. accepted as Leontodon L.
- Genus Thrixia Dulac
- Genus Thuraria [Nutt.]
- Genus Thymophyllum Benth. & Hook.f.
- Genus Thyopsis Ascherson & Graebner
- Genus Thyopsis Wedd.
- Genus Thyrsanthema Neck. ex Kuntze
- Genus Thysanurus O.Hoffm.
- Genus Thysopsis Wedd. accepted as Loricaria Wedd.
- Genus Timanthea Salisb. accepted as Baltimora L.
- Genus Tola Wedd. ex Benth. & Hook.f.
- Genus Tolbonia Kuntze accepted as Calotis R.Br. (1)
- Genus Toxacanthus (2)
- Genus Toxanthus Benth.
- Genus Trachodes D.Don accepted as Sonchus L. (1)
- Genus Tragantha Wallr. ex Endl.
- Genus Traganthes Wallr.
- Genus Tragoceras Spreng. accepted as Isostigma Less.
- Genus Tragopogonodes Kuntze
- Genus Tragopogum St.-Lag.
- Genus Triachne Cass. accepted as Nassauvia Comm. ex Juss.
- Genus Trianthus Hook.f.
- Genus Trichandrum Neck.
- Genus Trichocrepis Vis. accepted as Crepis L.
- Genus Trichoseris Poepp. & Endl.
- Genus Trichoseris Sch.Bip.
- Genus Trichostegia Turcz.
- Genus Trichostephus Cass. accepted as Wedelia Jacq.
- Genus Trigonopterum Steetz ex Andersson
- Genus Trigonotheca Sch.Bip.
- Genus Trimorphoea Benth. & Hook.f.
- Genus Trinacte Gaertn. accepted as Jungia L.f.
- Genus Trinciatella Adans.
- Genus Tripleurocota Starm.
- Genus Tripolion Raf.
- Genus Tripterachaenium Kuntze
- Genus Triptilium DC.
- Genus Trixis Sw. accepted as Clibadium F.Allam. ex L. (1)
- Genus Trixis Lag.
- Genus Trochoseris Poepp. & Endl. ex Endl.
- Genus Tropidolepis Tausch
- Genus Troximon Nutt.
- Genus Troximon [Nutt.]
- Genus Troximum Steud.
- Genus Trychinolepis B.L.Rob. accepted as Ophryosporus Meyen
- Genus Tuberostyles Benth. & Hook.f. (1)
- Genus Tubilium Cass. accepted as Pulicaria Gaertn.
- Genus Tulakenia Raf.
- Genus Tumionella Greene
- Genus Turanecio Hamzaoglu
- Genus Turpinia Lex.
- Genus Tylloma D.Don
- Genus Ubiaea J.Gay ex J.Gay
- Genus Ucacea Cass.
- Genus Uhdea Kunth accepted as Montanoa Cerv.
- Genus Ulina Opiz
- Genus Uniyala H.Rob. & Skvarla
- Genus Unxia Bertero ex Colla
- Genus Unxia Kunth
- Genus Urbanisol Kuntze accepted as Piptocarpha R.Br. (1)
- Genus Urostylis Meisn.
- Genus Vartheimia Benth. & Hook.f.
- Genus Varthemia Caruel
- Genus Vasquesia Phil. accepted as Unxia L.f.
- Genus Vasquesia Rydb.
- Genus Vazquezia Pritz.
- Genus Vea
- Genus Veltis Adans.
- Genus Venatris Raf.
- Genus Vendredia Baill.
- Genus Venegazia Benth. & Hook.f.
- Genus Vernasolis Raf.
- Genus Verutina Cass. accepted as Centaurea L.
- Genus Viborgia Spreng. accepted as Galinsoga Ruiz & Pav.
- Genus Vieria Webb ex Sch.Bip.
- Genus Villanovaea Post & Kuntze
- Genus Villaria DC.
- Genus Viraya Gaudich.
- Genus Virga-aurea Rupp.
- Genus Virgaria Raf. ex DC. accepted as Symphyotrichum Nees
- Genus Virgaurea Rupp.
- Genus Virgilia L'Hér.
- Genus Virletia Sch.Bip. ex Benth. & Hook.f. accepted as Bahia Lag.
- Genus Vittadenia Steud.
- Genus Voigtia Roth
- Genus Vosacan Adans.
- Genus Vosakan Adans.
- Genus Wahlenbergia Schumach. accepted as Enydra Lour.
- Genus Warthemia Boiss.
- Genus Wendelboa Soest accepted as Taraxacum Weber ex F.H.Wigg.
- Genus Wernera Kuntze accepted as Senecioneae Cass.
- Genus Wettsteinia Petr.
- Genus Wibelia Roehl.
- Genus Wiestia Sch.Bip. accepted as Lactuca L. (1)
- Genus Wigandia Neck. ex Less.
- Genus Wigandia Neck.
- Genus Wightia Spreng. ex DC.
- Genus Wikstroemia Spreng. accepted as Mikania Willd.
- Genus Willdenowia Steud.
- Genus Willkommia Sch.Bip. ex Nyman
- Genus Wirtgenia Sch.Bip. accepted as Wedelia Jacq.
- Genus Wollastonia DC. ex Decne.
- Genus Wootonella Standl. accepted as Verbesina L.
- Genus Wootonia Greene
- Genus Wurdackia Moldenke
- Genus Wurmschnittia Benth.
- Genus Xalkitis Raf.
- Genus Xantho J.Rémy
- Genus Xantholepis Willd. ex Less.
- Genus Xantium Gilib.
- Genus Xantophtalmum Sang.
- Genus Xenophonta Benth. & Hook.f.
- Genus Xeranthium Lepech.
- Genus Xeropappus Wall.
- Genus Xerotium Bluff & Fingerhuth
- Genus Xetoligus Raf.
- Genus Xylanthema Neck.
- Genus Xylothermia Greene
- Genus Yermo Dorn
- Genus Youngia Cass. descr. ampl. Babc. & Stebbins
- Genus Zacyntha Adans.
- Genus Zalucania Steud.
- Genus Zarabellia Neck. accepted as Berkheya Ehrh.
- Genus Zazintha Hall.
- Genus Zeyheria A.Spreng. accepted as Geigeria Griess.
