Acanthophyllum Hook. & Arn. accepted as Nassauvia Comm. ex Juss. (original description)
Acanthophyllum axillare Hook. & Arn. accepted as Nassauvia axillaris (Lag. ex Spreng.) D.Don (original description)
Acanthophyllum rosulatum Hook. & Arn. accepted as Nassauvia glomerulosa (Lag. ex Lindl.) D.Don (original description)
Alomia spilanthoides D.Don ex Hook. & Arn. accepted as Gymnocoronis spilanthoides (D.Don ex Hook. & Arn.) DC. (original description)
Ambrosia pitcheri Torr. ex Hook. accepted as Iva annua L. (original description)
Aster azureus Lindl. accepted as Symphyotrichum oolentangiense (Riddell) G.L.Nesom (original description)
Aster patens var. gracilis Hook. accepted as Symphyotrichum patens var. gracile (Hook.) G.L.Nesom (original description)
Aster turbinellus Lindl. accepted as Symphyotrichum turbinellum (Lindl.) G.L.Nesom (original description)
Barkhausia caroliniana var. ramosa Hook. (original description)
Bichenia dealbata D.Don ex Hook. accepted as Trichocline dealbata (Hook. & Arn.) Benth. & Hook.f. ex Griseb. (original description)
Caloptilium lagascae Hook. & Arn. accepted as Nassauvia lagascae var. lagascae (original description)
Centaurea bulbosa Hook. & Arn. (original description)
Centaurea floccosa Hook. & Arn. (original description)
Centaurea tweediei Hook. & Arn. (original description)
Chaetanthera berteroana Hook. & Arn. accepted as Trichocline aurea (D.Don) Reiche (original description)
Chaetanthera dealbata Hook. & Arn. accepted as Trichocline dealbata (Hook. & Arn.) Benth. & Hook.f. ex Griseb. (original description)
Chaetanthera microphylla (Cass.) Hook. & Arn. (original description)
Chaetanthera microphylla var. depauperata Hook. & Arn. (original description)
Chaetanthera pusilla (D.Don) Hook. & Arn. (original description)
Chaetanthera ramosissima Hook. & Arn. accepted as Chaetanthera moenchioides Less. (original description)
Chevreulia filiformis Hook. & Arn. accepted as Chevreulia acuminata Less. (original description)
Chevreulia gnaphalioides D.Don ex Hook. & Arn. (original description)
Chevreulia xeranthemoides D.Don ex Hook. (original description)
Chuquiraga ulicina Hook. (original description)
Cnicus arvensis Hook. accepted as Cirsium lecontei Torr. & A.Gray (original description)
Cnicus virginianus Hook. accepted as Cirsium lecontei Torr. & A.Gray (original description)
Dendroseris berteroana (Decne.) Hook. & Arn. (original description)
Dendroseris marginata (Bertero ex Decne.) Hook. & Arn. (original description)
Dendroseris micrantha (Bertero ex Decne.) Hook. & Arn. (original description)
Dendroseris mollis Hook. & Arn. (original description)
Dendroseris neriifolia (Decne.) Hook. & Arn. (original description)
Dendroseris pinnata (Bertero ex Decne.) Hook. & Arn. (original description)
Diplopappus divaricatus (Nutt.) Hook. accepted as Croptilon divaricatum (Nutt.) Raf. (original description)
Diplopappus marianus (L.) Cass. ex Hook. accepted as Chrysopsis mariana (L.) Elliott (original description)
Diplopappus sericeus Hook. accepted as Pityopsis graminifolia var. latifolia (Fernald) Semple & F.D.Bowers (original description)
Diplopappus trichophyllus (Nutt.) Hook. accepted as Chrysopsis gossypina subsp. gossypina (Michx.) Elliot (original description)
Doellingeria cornifolia Lindl. (original description)
Dolichlasium glanduliferum Lag. ex Hook. & Arn. accepted as Dolichlasium lagascae Gillies ex D.Don (original description)
Elephantopus nudicaulis var. major Hook. accepted as Elephantopus tomentosus L. (original description)
Eupatorium affine Hook. & Arn. accepted as Chromolaena odorata (L.) R.M.King & H.Rob. (original description)
Eupatorium ambiguum Hook. accepted as Eupatorium serotinum Michx. (original description)
Eupatorium bracteatum Hook. & Arn. (original description)
Eupatorium buniifolium Hook. ex Hook. & Arn. accepted as Acanthostyles buniifolius (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium calyculatum Hook. & Arn. accepted as Disynaphia calyculata (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium candolleanum Hook. & Arn. accepted as Barrosoa candolleana (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium ceratophyllum Hook. & Arn. accepted as Gyptis tanacetifolia (Gillies ex Hook. & Arn.) D.J.N.Hind & Flann (original description)
Eupatorium ciliatum Hook. & Arn. accepted as Chromolaena hookeriana (Griseb.) R.M.King & H.Rob. (original description)
Eupatorium congestum Hook. & Arn. accepted as Chromolaena squarrulosa (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium decipiens Hook. & Arn. accepted as Ophryosporus triangularis Meyen (original description)
Eupatorium donianum Hook. & Arn. accepted as Campuloclinium macrocephalum (Less.) DC. (original description)
Eupatorium ellipticum Hook. & Arn. accepted as Chromolaena elliptica (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium elongatum Hook. & Arn. accepted as Stomatanthes oblongifolius (Sch.Bip. ex Baker) H.Rob. (original description)
Eupatorium fulvum Hook. & Arn. accepted as Mikania fulva (Hook. & Arn.) Baker (original description)
Eupatorium gracile D.Don ex Hook. & Arn. accepted as Ageratina glechonophylla (Less.) R.M.King & H.Rob. (original description)
Eupatorium hirsutum Hook. & Arn. accepted as Chromolaena hirsuta (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium laetevirens Hook. & Arn. accepted as Austroeupatorium laetevirens (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium lanigerum Hook. & Arn. accepted as Gyptis lanigera (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium ligulifolium Hook. & Arn. (original description)
Eupatorium nummularia Hook. & Arn. (original description)
Eupatorium pallidum Hook. & Arn. accepted as Austroeupatorium inulaefolium (Kunth) R.M.King & H.Rob. (original description)
Eupatorium paradoxum Hook. & Arn. accepted as Ophryosporus paradoxus (Hook. & Arn.) Benth. & Hook. ex Hook.f. & B.D.Jac (original description)
Eupatorium paranense Hook. & Arn. accepted as Austroeupatorium inulaefolium (Kunth) R.M.King & H.Rob. (original description)
Eupatorium patens D.Don ex Hook. & Arn. accepted as Austrobrickellia patens (D.Don ex Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium pedunculosum Hook. & Arn. accepted as Chromolaena pedunculosa (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium populifolium Hook. & Arn. accepted as Urolepis hecatantha (DC.) R.M.King & H.Rob. (original description)
Eupatorium rufidulum Hook. & Arn. (original description)
Eupatorium scandens Hook. & Arn. accepted as Mikania lagoensis Baker (original description)
Eupatorium spathulatum Hook. & Arn. accepted as Disynaphia spathulata (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium squarrulosum Hook. & Arn. accepted as Chromolaena squarrulosa (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium subhastatum Hook. & Arn. accepted as Badilloa steetzii (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium subplumosum D.Don ex Hook. & Arn. accepted as Gyptis tanacetifolia (Gillies ex Hook. & Arn.) D.J.N.Hind & Flann (original description)
Eupatorium sulcatum Hook. & Arn. accepted as Mikania sulcata (Hook. & Arn.) B.L.Rob. (original description)
Eupatorium tanacetifolium Gillies ex Hook. & Arn. accepted as Gyptis tanacetifolia (Gillies ex Hook. & Arn.) D.J.N.Hind & Flann (original description)
Eupatorium teucriifolium D.Don ex Hook. & Arn. accepted as Chromolaena hirsuta (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium tremulum Hook. & Arn. accepted as Raulinoreitzia tremula (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium trisectum Hook. & Arn. (original description)
Eupatorium tweedieanum Hook. & Arn. accepted as Hatschbachiella tweedieana (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium virgatum D.Don ex Hook. & Arn. accepted as Acanthostyles buniifolius (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium viscidum Hook. & Arn. accepted as Lorentzianthus viscidus (Hook. & Arn.) R.M.King & H.Rob. (original description)
Gochnatia fascicularis (D.Don) D.Don ex Hook. & Arn. (original description)
Gochnatia foliolosa (D.Don) D.Don ex Hook. & Arn. (original description)
Gochnatia genistoides (D.Don) Hook. & Arn. accepted as Cyclolepis genistoides Gillies ex D.Don (original description)
Gochnatia glutinosa (D.Don) D.Don ex Hook. & Arn. (original description)
Gochnatia pyrifolia (D.Don) D.Don ex Hook. & Arn. (original description)
Gochnatia revoluta D.Don ex Hook. & Arn. accepted as Nardophyllum lanatum (Meyen) Cabrera (original description)
Gochnatia rigida D.Don ex Hook. & Arn. (original description)
Gochnatia subg. Pentaphorus (D.Don) Hook. & Arn. (original description)
Helenium quadridentatum Hook. (original description)
Helianthus tracheliifolius Hook. (original description)
Hieracium sordidum Gillies ex Hook. & Arn. accepted as Hieracium gilliesianum Sleumer (original description)
Hyalis D.Don ex Hook. & Arn. (original description)
Hyalis argentea D.Don ex Hook. & Arn. (original description)
Krigia caroliniana Hook. (original description)
Leptalea D.Don ex Hook. & Arn. (original description)
Leptalea apiculata D.Don (original description)
Leptostelma donianum Gillies ex Hook. & Arn. accepted as Campuloclinium macrocephalum (Less.) DC. (original description)
Leucheria bridgesii Hook. & Arn. (original description)
Leucheria cummingii Hook. & Arn. (original description)
Leucheria gilliesii Hook. & Arn. (original description)
Leucheria laciniata Hook. & Arn. accepted as Leucheria candidissima Gillies & D.Don (original description)