Species Aster acer Roehl.
Species Aster acris S.G.Gmel.
Species Aster ageratoides Turcz.
Species Aster aitchisonii Boiss.
Species Aster alatipes Hemsl.
Species Aster albescens (DC.) Wall. ex Hand.-Mazz.
Species Aster alpinoamellus Novopokr. ex Tzvelev
Species Aster alpinus L.
Species Aster amellus L.
Species Aster ananthocladus Hilliard & B.L.Burtt
Species Aster andringitrensis Humbert
Species Aster angustus (Lindl.) Torr. & A.Gray
Species Aster apinnatifidus (Mat.) Makino
Species Aster arenarius (Kitam.) Nemoto
Species Aster argyi H.Lév.
Species Aster argyropholis Hand.-Mazz.
Species Aster asa-grayi Makino
Species Aster ascendens Lindl.
Species Aster asteroides (DC.) Kuntze
Species Aster auriculatus Franch.
Species Aster baccharoides (Benth.) Steetz
Species Aster bachtiaricus Mozaff.
Species Aster bahamensis Britton
Species Aster bakerianus Burtt Davy ex C.A.Sm.
Species Aster barbellatus Grierson
Species Aster batangensis Bureau & Franch.
Species Aster bergianus Harv.
Species Aster bietii Franch.
Species Aster bipinnatisectus Ludlow ex Grierson
Species Aster bojeri Humbert
Species Aster bowiei Harv.
Species Aster bracei Britton
Species Aster brachyphyllus C.C.Chang
Species Aster brachytrichus Franch.
Species Aster brevis Hand.-Mazz.
Species Aster breweri (A.Gray) Semple
Species Aster burgessii Britton
Species Aster caricifolius Kunth
Species Aster chimanimaniensis W.Lippert
Species Aster chingshuiensis Y.C.Liu & C.H.Ou
Species Aster ciliatus Walter
Species Aster cinerarioides (DC.) Humbert
Species Aster coahuilensis S.F.Blake
Species Aster comptonii W.Lippert
Species Aster confertifolius Hilliard & B.L.Burtt
Species Aster curvescens E.S.Burgess
Species Aster decumbens (Schltr.) G.L.Nesom
Species Aster diffusus Dryand.
Species Aster dimorphophyllus Franch. & Sav.
Species Aster diplostephioides (DC.) Benth. ex C.B.Clarke
Species Aster divergens Dryand.
Species Aster dumosus Nees
Species Aster dumosus Hoffm.
Species Aster ensifer Boss.
Species Aster erucifolius (Thell.) W.Lippert
Species Aster falcifolius Hand.-Mazz.
Species Aster falconeri (C.B.Clarke) Hutch.
Species Aster fanjingshanicus Y.L.Chen & D.J.Liu
Species Aster farreri W.W.Sm. & Jeffrey
Species Aster fastigiatus Fisch.
Species Aster filipes J.Q.Fu
Species Aster fischerianus DC.
Species Aster flaccidus Bunge
Species Aster formosanus Hayata
Species Aster fragilis Elliott
Species Aster fulgidulus Grierson
Species Aster furcatus E.S.Burgess ex Britton & A.Brown
Species Aster fuscescens Bureau & Franch.
Species Aster giraldii Diels
Species Aster glehnii F.Schmidt
Species Aster gracilicaulis Y.Ling ex J.Q.Fu
Species Aster handelii Onno
Species Aster harrowianus Diels
Species Aster harveyanus Kuntze
Species Aster hayatae H.Lév. & Vaniot
Species Aster heleius Urb.
Species Aster heliopsis Grierson
Species Aster henryi Hemsl.
Species Aster hersileoides C.K.Schneid.
Species Aster heterolepis Hand.-Mazz.
Species Aster himalaicus C.B.Clarke
Species Aster hispidus Thunb.
Species Aster hololachnus Ling
Species Aster hualiensis S.S.Ying
Species Aster hunanensis Hand.-Mazz.
Species Aster hybridus E.H.L.Krause
Species Aster hypoleucus Hand.-Mazz.
Species Aster ibericus Steven
Species Aster iinumae Kitam. ex Hara
Species Aster incisa
Species Aster indamellus Grierson
Species Aster indicus L.
Species Aster ionoglossus Ling
Species Aster itsunboshi Kitam.
Species Aster jeffreyanus Diels
Species Aster jishouensis W.P.Li & S.X.Liu
Species Aster juchaihu Z.Y.Zhu & B.Q.Min
Species Aster kansuensis Farrer
Species Aster kantoensis Kitam.
Species Aster kayserianus Schur
Species Aster komonoensis Makino
Species Aster koraginensis Kom.
Species Aster kyobuntensis Nakai
Species Aster laevigatus (Sond.) Kuntze
Species Aster laka C.B.Clarke
Species Aster lanceolatus (Hook.) Kuntze
Species Aster langaoensis J.Q.Fu
Species Aster lasiocladus Hayata
Species Aster latibracteatus Franch.
Species Aster latisquamatus (Maxim.) Hand.-Mazz.
Species Aster lavandulifolius Hand.-Mazz.
Species Aster laxifolius Lindl.
Species Aster leiophylus
Species Aster leiopyllus
Species Aster leonis Britton
Species Aster limonifolius (Less.) B.Fedtsch.
Species Aster limosus Hemsl.
Species Aster limprichtii Diels
Species Aster lindenii Sch.Bip.
Species Aster lingulatus Franch.
Species Aster lipskii Kom.
Species Aster luzonensis Elmer
Species Aster lydenburgensis W.Lippert
Species Aster maackii Regel
Species Aster magnus Y.N.Lee & C.Kim
Species Aster mangshanensis Y.Ling
Species Aster marchandii H.Lév.
Species Aster megalanthus Y.Ling
Species Aster menthodorus (Benth.) Govaerts
Species Aster menziesii Lindl.
Species Aster milanjiensis S.Moore
Species Aster miquelianus Hara
Species Aster miser L.
Species Aster miyagii Koidz.
Species Aster molliusculus (Lindl. ex DC.) C.B.Clarke
Species Aster moranensis Kunth
Species Aster morrisonensis Hayata
Species Aster motuoensis Y.L.Chen
Species Aster muliensis Hand.-Mazz.
Species Aster mutabilis Vell.
Species Aster nakaoi Kitam.
Species Aster neoelegans Grierson
Species Aster nigrocinctus Ling
Species Aster nigromontanus Dunn
Species Aster nitidus C.C.Chang
Species Aster novae-belgiae
Species Aster novopokrovskyi Iljin
Species Aster nubimontis W.Lippert
Species Aster okanoganus Piper
Species Aster oreophilus Franch.
Species Aster outeniquae Fourc.
Species Aster ovalifolius Kitam.
Species Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
Species Aster panduratus Nees ex Walp.
Species Aster paniculatus Muhl.
Species Aster peduncularis Wall. ex Nees
Species Aster peglerae Bolus
Species Aster perfoliatus Oliv.
Species Aster philippinensis S.Moore
Species Aster pleiocephalus (Harv.) Hutch.
Species Aster pluriflorus G.Don
Species Aster polios C.K.Schneid.
Species Aster poliothamnus Diels
Species Aster popovii Botsch.
Species Aster prainii (J.R.Drumm.) Y.L.Chen
Species Aster pseudobakeranus W.Lippert
Species Aster pseudodumosus (Thell.) Bergmans
Species Aster pseudoglehnii Y.S.Lim, Hyun & H.Shin
Species Aster pujosii Quézel
Species Aster pycnophyllus Franch. ex Diels
Species Aster pycnophyllus Franch. ex W.W.Sm.
Species Aster pyrenaeus Desf. ex DC.
Species Aster quitensis Willd. ex Spreng.
Species Aster retusus Ludlow
Species Aster rockianus Hand.-Mazz.
Species Aster roscidus E.S.Burgess ex Britton & A.Brown
Species Aster rugulosus Maxim.
Species Aster ruoqiangensis Y.Wei & C.H.An
Species Aster salicifolius Lam.
Species Aster salsuginosus Richardson ex R.Br.
Species Aster salwinensis Onno
Species Aster sampsonii (Hance) Hemsl.
Species Aster sanczirii Kamelin & Gubanov
Species Aster satsumensis Soejima
Species Aster sekimotoi Makino
Species Aster semiamplexicaulis (Makino) Makino ex Koidz.
Species Aster senecioides Franch.
Species Aster setchuenensis Franch.
Species Aster shennongjiaensis W.P.Li & Z.G.Zhang
Species Aster sibiricus Turcz. ex Torr. & A.Gray
Species Aster sikkimensis Hook.f.
Species Aster sikkimmensis Hook.f. & Thomson
Species Aster sikuensis W.W.Sm. & Farrer
Species Aster silenifolius Turcz.
Species Aster sinianus Hand.-Mazz.
Species Aster sinoangustifolius Brouillet, Semple & Y. L. Chen
Species Aster sohayakiensis Koidz.
Species Aster souliei Franch.
Species Aster spathulifolius Maxim.
Species Aster squamatus (Spreng.) Hieron.
Species Aster stracheyi Hook.f.
Species Aster striatus Champ. ex Benth.
Species Aster subintegerrimus Trautv.
Species Aster subulatus Michx.
Species Aster sugimotoi Kitam.
Species Aster taiwanensis Kitam.
Species Aster takasagomontanus Sasaki
Species Aster taliangshanensis Y.Ling
Species Aster tansaniensis W.Lippert
Species Aster taoyuenensis S.S.Ying
Species Aster tataricus L.f.
Species Aster techinensis Y.Ling
Species Aster tenuipes Makino
Species Aster thomsonii C.B.Clarke
Species Aster tianmenshanensis G. J.Zhang & T.G. Gao
Species Aster tientschwanensis Hand.-Mazz.
Species Aster tonglingensis G.J. Zhang & T.G. Gao
Species Aster tongolensis Franch.
Species Aster tricapitatus Vaniot
Species Aster tricephalus C.B.Clarke
Species Aster trichoneurus Y.Ling
Species Aster trinervius Roxb. ex Roxb.
Species Aster trinervius Roxb. ex D.Don
Species Aster tsarungensis (Grierson) Y.Ling
Species Aster turbinatus S.Moore
Species Aster uchiyamae Nakai
Species Aster veitchianus Hutch. & J. R. Drumm. ex G. J. Zhang & T. G. Gao
Species Aster velutinosus Y.Ling
Species Aster vestitus Franch.
Species Aster viscidulus (Makino) Makino
Species Aster vvedenskyi Bondarenko
Species Aster willkommii Sch.Bip.
Species Aster woroschilowii Zdor. & Schapoval
Species Aster yakushimensis (Kitam.) Soejima & Yahara
Species Aster yomena (Kitam.) Honda
Species Aster yomena Makino
Species Aster yoshinaganus (Kitam.) Mot.Ito & Soejima
Species Aster yunnanensis Franch.
Species Aster zuluensis W.Lippert

Species Aster abatus S.F.Blake accepted as Xylorhiza tortifolia (Torr. & A.Gray) Greene
Species Aster abbreviatus Nees accepted as Symphyotrichum lanceolatum (Willd.) G.L.Nesom
Species Aster abchasicus Kem.-Nath. accepted as Kemulariella abchasica (Kem.-Nath.) Tamamsch.
Species Aster abyssinicus Sch.Bip. accepted as Felicia dentata subsp. dentata (A.Rich.) Dandy
Species Aster abyssinicus Hochst. ex A.Rich. accepted as Felicia dentata (A.Rich.) Dandy
Species Aster abyssinicus (Sch.Bip.) Kuntze accepted as Felicia abyssinica Sch.Bip. ex A.Rich.
Species Aster acadiensis Shinners accepted as Symphyotrichum lateriflorum var. tenuipes (Wiegand) G.L.Nesom
Species Aster acaulis Wedd. accepted as Noticastrum marginatum (Kunth) Cuatrec.
Species Aster acerosus (Bertero) Kuntze accepted as Haplopappus acerosus Bertero
Species Aster acmellus Pall. accepted as Aster amellus L.
Species Aster acradenius (Greene) Kuntze accepted as Isocoma acradenia (Greene) Greene
Species Aster acris L. accepted as Galatella sedifolia (L.) Greuter
Species Aster aculeatus Labill. accepted as Olearia ramulosa (Labill.) Benth.
Species Aster acuminatus Michx. accepted as Oclemena acuminata (Michx.) Greene
Species Aster adalbertii Kuntze accepted as Haplopappus integerrimus (Hook. & Arn.) H.M.Hall
Species Aster adenolasius F.Muell. accepted as Olearia adenolasia (F.Muell.) F.Muell. ex Benth.
Species Aster adenolepis S.F.Blake accepted as Dieteria bigelovii var. mucronata (Greene) D.R.Morgan & R.L.Hartm.
Species Aster adenophorus (F.Muell.) F.Muell. accepted as Olearia adenophora (F.Muell.) Benth.
Species Aster adfinis Less. accepted as Felicia dubia Cass.
Species Aster adnatus Nutt. accepted as Symphyotrichum adnatum (Nutt.) G.L.Nesom
Species Aster adscendens (DC.) Reiche accepted as Noticastrum adscendens DC.
Species Aster adulterinus Willd. accepted as Symphyotrichum novi-belgii (L.) G.L.Nesom
Species Aster adustus (Maxim.) Koidz. ex Nakai accepted as Aster ageratoides Turcz.
Species Aster aestivus Dryand. ex Aiton accepted as Symphyotrichum novi-belgii var. novi-belgii (L.)
Species Aster aestivus Rothr. accepted as Symphyotrichum spathulatum (Lindl.) G.L.Nesom
Species Aster aestivus A.Gray accepted as Symphyotrichum novi-belgii var. novi-belgii (L.)
Species Aster aethiopicus Burm.f. accepted as Felicia aethiopica subsp. aethiopica (Burm.f.) Bolus & Wolley-Dod ex Adamson & T.M.Salt
Species Aster agrostifolius E.S.Burgess accepted as Symphyotrichum lateriflorum var. angustifolium (Wiegand) G.L.Nesom
Species Aster alamanii Kuntze accepted as Solidago velutina DC.
Species Aster alatus Aikin accepted as Symphyotrichum patens (Aiton) G.L.Nesom
Species Aster albanicus (Degen) Csiki & al. accepted as Galatella albanica Degen
Species Aster albanicus (Degen) Degen accepted as Galatella albanica Degen
Species Aster albarracinensis Pau accepted as Galatella aragonensis (Asso) Nees
Species Aster albertii Phil. accepted as Erigeron gilliesii (Hook. & Arn.) Cabrera
Species Aster albidus (Hook.f.) Kuntze accepted as Olearia albida (Hook.f.) Hook.f.
Species Aster albus (Nutt.) Eaton & Wright accepted as Solidago ptarmicoides (Torr. & A.Gray) B.Boivin accepted as Oligoneuron album (Nutt.) G.L.Nesom
Species Aster albus (Nutt.) Eaton accepted as Solidago ptarmicoides (Torr. & A.Gray) B.Boivin accepted as Oligoneuron album (Nutt.) G.L.Nesom
Species Aster albus Willd. ex Spreng. accepted as Aster amellus L.
Species Aster albus Reiche accepted as Noticastrum sericeum (Less.) Less. ex Phil.
Species Aster albus (Phil.) Kuntze accepted as Noticastrum sericeum (Less.) Less. ex Phil.
Species Aster alpicola (F.Muell.) F.Muell. accepted as Olearia alpicola (F.Muell.) F.Muell. ex Benth.
Species Aster alpigenus (Torr. & A.Gray) A.Gray accepted as Oreostemma alpigenum (Torr. & A.Gray) Greene
Species Aster altaicus Willd. accepted as Kalimeris altaica (Willd.) Nees ex Fisch.Mey. & Avé-Lall.
Species Aster altissimus Moench accepted as Symphyotrichum novae-angliae (L.) G.L.Nesom
Species Aster alwartensis Lodd. ex Sims. accepted as Erigeron pulchellus Michx.
Species Aster alyssoides Turcz. accepted as Asterothamnus alyssoides (Turcz.) Novopokr.
Species Aster amani Post accepted as Galatella amani (Post) Grierson
Species Aster ambiguus (DC.) E.H.L.Krause accepted as Erigeron bonariensis L.
Species Aster ambiguus Bernh. ex Nees accepted as Eurybia macrophylla (L.) Cass.
Species Aster amelloides Besser accepted as Aster amellus subsp. bessarabicus (Bernh. ex Rchb.) Soó
Species Aster amelloides Hoffm. accepted as Aster amellus L.
Species Aster amellus Aitch. accepted as Aster indamellus Grierson
Species Aster americanus Onno accepted as Aster alpinus subsp. vierhapperi Onno
Species Aster amethystinus Nutt. accepted as Symphyotrichum ×amethystinum (Nutt.) G.L.Nesom
Species Aster ammani Lindl. ex DC. accepted as Eurybia sibirica (L.) G.L.Nesom
Species Aster amoenus Lam. accepted as Symphyotrichum puniceum (L.) Á.Löve & D.Löve
Species Aster amoenus (Sch.Bip.) Harv. accepted as Felicia amoena subsp. amoena (Sch.Bip.) Levyns
Species Aster amplexicaulis Michx. accepted as Symphyotrichum patens var. patens (Aiton) G.L.Nesom
Species Aster amplexicaulis (Torr. & A.Gray) Kuntze accepted as Solidago amplexicaulis Torr. & A.Gray
Species Aster amplexifolius Rydb. accepted as Eurybia integrifolia (Nutt.) G.L.Nesom
Species Aster amplifolius (Wooton & Standl.) Kittell accepted as Dieteria asteroides Torr.
Species Aster amygdalinus Lam. accepted as Doellingeria umbellata var. umbellata (Mill.) Nees
Species Aster anacampthiphyllus Dalla Torre & Sarnth. accepted as Linosyris anacamphthiphylla Ambrosi
Species Aster andersonii (A.Gray) A.Gray accepted as Oreostemma alpigenum var. andersonii (A.Gray) G.L.Nesom
Species Aster andicola Hauman accepted as Erigeron andicola DC.
Species Aster andinus Kuntze accepted as Haplopappus pinnatifidus Nutt.
Species Aster andohahelensis Humbert accepted as Madagaster andohahelensis (Humbert) G.L.Nesom
Species Aster andryaloides (DC.) B.Fedtsch. accepted as Leucheria rosea Poepp. ex Less.
Species Aster anethifolius (Phil.) Kuntze accepted as Grindelia anethifolia (Phil.) Adr.Bartoli & Tortosa
Species Aster angelandri Kuntze accepted as Oonopsis engelmannii (A.Gray) Greene
Species Aster angulatus (Kirk) Kuntze accepted as Olearia albida var. angulata (Kirk) Allan
Species Aster angustatus (Lindl.) Torr. & A.Gray accepted as Symphyotrichum ciliatum (Ledeb.) G.L.Nesom
Species Aster angustatus Kuntze accepted as Olearia oleifolia Kirk
Species Aster angustifolius Lindl. accepted as Kalimeris altaica (Willd.) Nees ex Fisch.Mey. & Avé-Lall.
Species Aster angustifolius Lindl. ex Royle accepted as Kalimeris altaica (Willd.) Nees ex Fisch.Mey. & Avé-Lall.
Species Aster angustifolius C.C.Chang accepted as Miyamayomena angustifolia (Hand.-Mazz.) Y.L.Chen accepted as Aster sinoangustifolius Brouillet, Semple & Y. L. Chen
Species Aster angustifolius Chang accepted as Aster sinoangustifolius Brouillet, Semple & Y. L. Chen
Species Aster angustifolius Jacq. accepted as Felicia hyssopifolia subsp. hyssopifolia (P.J.Bergius) Nees
Species Aster angustissimus Tausch accepted as Galatella angustissima (Tausch) Novopokr.
Species Aster angustus Nees accepted as Symphyotrichum lanceolatum (Willd.) G.L.Nesom
Species Aster angustus Schur accepted as Aster kayserianus Schur
Species Aster annectens Harv. accepted as Felicia annectens (Harv.) Grau
Species Aster annuus L. accepted as Erigeron annuus (L.) Desf.
Species Aster anomalus Engelm. ex Torr. & A.Gray accepted as Symphyotrichum anomalum (Engelm. ex Engelm.) G.L.Nesom
Species Aster ansifer Bosser. accepted as Macowania ericifolia (Forssk.) B.L.Burtt & Grau
Species Aster anthylloides (Meyen & Walp.) Kuntze accepted as Haplopappus anthylloides Meyen & Walp.
Species Aster anticostensis Fernald accepted as Symphyotrichum anticostense (Fernald) G.L.Nesom
Species Aster antirrhinifolius Salisb. accepted as Felicia cymbalariae (Aiton) Bolus & Wolley-Dod ex Adamson & T.M.Salter
Species Aster antucensis (Phil.) Kuntze accepted as Noticastrum antucense Phil.
Species Aster apricus (A.Gray) Rydb. accepted as Symphyotrichum foliaceum var. apricum (A.Gray) G.L.Nesom
Species Aster aquifolius (Greene ex Wooton & Standl.) S.F.Blake accepted as Dieteria bigelovii var. bigelovii (A.Gray) D.R.Morgan & R.L.Hartm.
Species Aster aragonensis bout. ex Willk. & Lange accepted as Aster willkommii Sch.Bip.
Species Aster aragonensis Asso accepted as Galatella aragonensis (Asso) Nees
Species Aster araucanus (Phil.) Kuntze accepted as Grindelia anethifolia (Phil.) Adr.Bartoli & Tortosa
Species Aster arborescens Kuntze accepted as Olearia arborescens (G.Forst.) Cockayne & Laing
Species Aster arbutoides (J.Rémy) Kuntze accepted as Haplopappus glutinosus Cass.
Species Aster archerianus Kuntze accepted as Solidago rugosa Mill.
Species Aster arenarioides A.Gray accepted as Erigeron arenarioides (D.C.Eaton ex A.Gray) A.Gray ex Rydb.
Species Aster arenosus (A.Heller) S.F.Blake accepted as Chaetopappa ericoides (Torr.) G.L.Nesom
Species Aster argenteus Michx. (unaccepted)
Species Aster argentinensis Cabrera (unaccepted)
Species Aster argophyllus Labill. (unaccepted)
Species Aster argunensis DC. (unaccepted)
Species Aster argutus (Aiton) Kuntze (unaccepted)
Species Aster argutus Nees (unaccepted)
Species Aster argutus R.Br. ex Benth. (unaccepted)
Species Aster armenus (Boiss.) Kuntze (unaccepted)
Species Aster armeriifolius Greene (unaccepted)
Species Aster armeriodes Kuntze (unaccepted)
Species Aster armoricanus (Rouy) A.W.Hill (unaccepted)
Species Aster artemisiiflorus Poir. (unaccepted)
Species Aster artemisioides F.Muell. (unaccepted)
Species Aster asae Kuntze (unaccepted)
Species Aster ascendens Lindl. (unaccepted)
Species Aster aspargioides (A.Gray) Kuntze (unaccepted)
Species Aster asper (Less.) Schönland (unaccepted)
Species Aster asper Schönland (unaccepted)
Species Aster asperatus Kuntze (unaccepted)
Species Aster asperellus (Rech.f. & Köie) Leins & Podlech (unaccepted)
Species Aster asperifolius E.S.Burgess (unaccepted)
Species Aster asperrimus Nutt. (unaccepted)
Species Aster asperugineus D.C.Eaton (unaccepted)
Species Aster asperulus Torr. & A.Gray (unaccepted)
Species Aster asperulus (DC.) Wall. ex Hook.f. (unaccepted)
Species Aster associatus Kitag. (unaccepted)
Species Aster asterellus Bornm. (unaccepted)
Species Aster asteroides (Colla) Rusby (unaccepted)
Species Aster asteroides (L.) MacMill. (unaccepted)
Species Aster asterotrichus (F.Muell.) F.Muell. (unaccepted)
Species Aster atacamensis (Phil.) Kuntze (unaccepted)
Species Aster atenes Kuntze (unaccepted)
Species Aster attenuatus (Howell) M.Peck (unaccepted)
Species Aster attenuatus (Howell) Frye & Rigg (unaccepted)
Species Aster attenuatus Lindl. (unaccepted)
Species Aster attenuatus Lindl. ex Hook. (unaccepted)
Species Aster atticus Pall. (unaccepted)
Species Aster aurantius L. (unaccepted)
Species Aster aureus (A.Gray) Kuntze (unaccepted)
Species Aster aureus D.Don (unaccepted)
Species Aster auriculatus Schloss. ex Nyman (unaccepted)
Species Aster auritus Lindl. ex DC. (unaccepted)
Species Aster australis Hort. ex DC. (unaccepted)
Species Aster autranii Post (unaccepted)
Species Aster autumnalis Wender. ex Nees, sec.Torr. & A.Gray (unaccepted)
Species Aster avicenniifolius (Hook.f.) F.Muell. (unaccepted)
Species Aster avicenniifolius (Hook.f.) Kuntze (unaccepted)
Species Aster avitus Alexander (unaccepted)
Species Aster azureus Lindl. (unaccepted)
Species Aster baccharodes Kuntze (unaccepted)
Species Aster baldwinii Torr. & A.Gray (unaccepted)
Species Aster ballii F.Muell. (unaccepted)
Species Aster bangii Rusby (unaccepted)
Species Aster barbatus (DC.) Harv. (unaccepted)
Species Aster barcinonensis Sennen (unaccepted)
Species Aster baronii Humbert (unaccepted)
Species Aster batakensis Hayata (unaccepted)
Species Aster batesii Rydb. (unaccepted)
Species Aster baylahuen (J.Rémy) Kuntze (unaccepted)
Species Aster beckleri (F.Muell.) F.Muell. (unaccepted)
Species Aster behrii Schltdl. (unaccepted)
Species Aster bellidiastrum Nees (unaccepted)
Species Aster bellidiastrum (L.) Scop. (unaccepted)
Species Aster bellidiflorus Steud. (unaccepted)
Species Aster bellidiflorus Nees (unaccepted)
Species Aster bellidiflorus Willd. (unaccepted)
Species Aster bellidioides Buch.-Ham. ex D.Don (unaccepted)
Species Aster bellis E.H.L.Krause (unaccepted)
Species Aster benghalensis B.Heyne ex DC. (unaccepted)
Species Aster benthamii Steetz (unaccepted)
Species Aster berberidis (A.Gray) Kuntze (unaccepted)
Species Aster berberifolius A.Cunn. ex DC. (unaccepted)
Species Aster bergerianus (Spreng.) Harv. (unaccepted)
Species Aster berlandieri Kuntze (unaccepted)
Species Aster bernardinus H.M.Hall (unaccepted)
Species Aster berteroi (DC.) Kuntze (unaccepted)
Species Aster bessarabicus Bernh. ex Rchb. (unaccepted)
Species Aster bezanillana (J.Rémy) Kuntze (unaccepted)
Species Aster bicolor (L.) Nees (unaccepted)
Species Aster bicolor Dietr. ex DC. (unaccepted)
Species Aster bidwillii Kuntze (unaccepted)
Species Aster biennis Torr. (unaccepted)
Species Aster biennis Nutt. (unaccepted)
Species Aster biennis Ledeb. (unaccepted)
Species Aster bifidus Nees (unaccepted)
Species Aster biflorus presc. ex DC. (unaccepted)
Species Aster biflorus Michx. (unaccepted)
Species Aster biflorus (L.) Druce (unaccepted)
Species Aster bifoliatus (Walter) H.E.Ahles (unaccepted)
Species Aster bifrons Lindl. ex DC. (unaccepted)
Species Aster bifrons All. (unaccepted)
Species Aster bigelovii A.Gray (unaccepted)
Species Aster bimater Standl. & Steyerm. (unaccepted)
Species Aster binominatus Kuntze (unaccepted)
Species Aster blakei (Porter) Porter (unaccepted)
Species Aster blakei (Porter) House (unaccepted)
Species Aster blandus Pursh (unaccepted)
Species Aster blepharophyllus A.Gray (unaccepted)
Species Aster bloomeri A.Gray (unaccepted)
Species Aster bloomeri (A.Gray) Kuntze (unaccepted)
Species Aster bodkinii Compton (unaccepted)
Species Aster bolanderi (A.Gray) Kuntze (unaccepted)
Species Aster boltoniae Greene (unaccepted)
Species Aster bonariensis Spreng. (unaccepted)
Species Aster bonplandii Kuntze (unaccepted)
Species Aster borealis (Torr. & A.Gray) Prov. (unaccepted)
Species Aster bostoniensis Hort. ex Baker (unaccepted)
Species Aster botryanthus K.Koch (unaccepted)
Species Aster boweri Hemsl. (unaccepted)
Species Aster boykinii E.S.Burgess (unaccepted)
Species Aster bracei Britton ex Small (unaccepted)
Species Aster brachyactis S.F.Blake (unaccepted)
Species Aster brachycomoides F.Muell. (unaccepted)
Species Aster brachylepis (A.Gray) Kuntze (unaccepted)
Species Aster brachypholis Small (unaccepted)
Species Aster brachyphyllus (Sond.) F.Muell. (unaccepted)
Species Aster bracteatus Turcz. ex Herder (unaccepted)
Species Aster bracteolatus Nutt. (unaccepted)
Species Aster brandegeei (A.Gray) Kuntze (unaccepted)
Species Aster breviflorus Phil. (unaccepted)
Species Aster brevilingulatus (Sch.Bip. ex Hemsl.) McVaugh (unaccepted)
Species Aster brevipedunculatus Hutch. (unaccepted)
Species Aster brevipes Benth. (unaccepted)
Species Aster breviscapus Vaniot (unaccepted)
Species Aster breyninus (Beck) Fritsch (unaccepted)
Species Aster brickellioides Greene (unaccepted)
Species Aster britannicus All. (unaccepted)
Species Aster brittonii Kuntze (unaccepted)
Species Aster brumalis Nees (unaccepted)
Species Aster bubonium Scop. (unaccepted)
Species Aster buchananii Kuntze (unaccepted)
Species Aster buchubergensis Dinter (unaccepted)
Species Aster buckleyi (Torr. & A.Gray) Kuntze (unaccepted)
Species Aster bullatus Klatt (unaccepted)
Species Aster bupleurifolius hort.monsp. ex Nees (unaccepted)
Species Aster burchellii Hook.f. (unaccepted)
Species Aster burkei Harv. (unaccepted)
Species Aster burkei (A.Gray) Howell (unaccepted)
Species Aster bustillosianus (J.Rémy) Kuntze (unaccepted)
Species Aster butleri Rydb. (unaccepted)
Species Aster cabrerae Ariza (unaccepted)
Species Aster cabulicus Lindl. (unaccepted)
Species Aster caesius (L.) Kuntze (unaccepted)
Species Aster caespitosus Hort. ex Lindl. (unaccepted)
Species Aster caespitosus (Nutt.) Kuntze (unaccepted)
Species Aster caffrorum Less. (unaccepted)
Species Aster calderi B.Boivin (unaccepted)
Species Aster calendulaceus (Griseb.) Kuntze (unaccepted)
Species Aster californicus Less. (unaccepted)
Species Aster californicus (Nutt.) Kuntze (unaccepted)
Species Aster calvatus (Baker) Herter (unaccepted)
Species Aster campestris Nutt. (unaccepted)
Species Aster camporum Gardner (unaccepted)
Species Aster camptosorus Small (unaccepted)
Species Aster canadensis (L.) E.H.L.Krause (unaccepted)
Species Aster canadensis (L.) Kuntze (unaccepted)
Species Aster canbyi Kuntze (unaccepted)
Species Aster canbyi Vasey ex A.Gray (unaccepted)
Species Aster canbyi (A.Gray) Vasey ex Rydb. (unaccepted)
Species Aster candollei Kuntze (unaccepted)
Species Aster candollei Harv. (unaccepted)
Species Aster canescens (Nees) Fisjun (unaccepted)
Species Aster canescens Pursh (unaccepted)
Species Aster cantonensis (Lour.) Courtois (unaccepted)
Species Aster canus Waldst. & Kit. (unaccepted)
Species Aster capensis Less. (unaccepted)
Species Aster capillaceus E.S.Burgess (unaccepted)
Species Aster carmesinus E.S.Burgess (unaccepted)
Species Aster carnerosanus S.Watson (unaccepted)
Species Aster carneus Baker (unaccepted)
Species Aster carneus Nees (unaccepted)
Species Aster carneus Torr. & A.Gray (unaccepted)
Species Aster carnosus Gilib. (unaccepted)
Species Aster carnosus (A.Gray) A.Gray ex Hemsl. (unaccepted)
Species Aster carolinianus Walter (unaccepted)
Species Aster carthamodes (Hook.) Kuntze (unaccepted)
Species Aster caryophyllus Steud. (unaccepted)
Species Aster cassiniae F.Muell. (unaccepted)
Species Aster castaneus E.S.Burgess (unaccepted)
Species Aster catalaunicus Willk. & Costa (unaccepted)
Species Aster caubulicus Hook. (unaccepted)
Species Aster caucasicus Willd. (unaccepted)
Species Aster celmisia F.Muell. (unaccepted)
Species Aster centaurodes (DC.) Kuntze (unaccepted)
Species Aster cerberoanus (J.Rémy) Kuntze (unaccepted)
Species Aster chamaedrifolius Lam. ex DC. (unaccepted)
Species Aster chamissonis A.Gray (unaccepted)
Species Aster chapmanii Torr. & A.Gray (unaccepted)
Species Aster charieis Less. (unaccepted)
Species Aster chebataroffii Herter (unaccepted)
Species Aster chezuensis (Kitam.) Nakai (unaccepted)
Species Aster chilensis Nees (unaccepted)
Species Aster chinensis L. (unaccepted)
Species Aster chlorolepis E.S.Burgess (unaccepted)
Species Aster chrysanthemifolius (DC.) Kuntze (unaccepted)
Species Aster chrysanthemifolius Hort. ex Steud. (unaccepted)
Species Aster chrysanthemoides Willd. ex Spreng. (unaccepted)
Species Aster chryseus Kuntze (unaccepted)
Species Aster chrysocomifolius Hort. ex Steud. (unaccepted)
Species Aster chrysocomoides Turcz. ex DC. (unaccepted)
Species Aster chrysocomoides Desf. (unaccepted)
Species Aster chrysogonii Sennen (unaccepted)
Species Aster chrysophyllus A.Cunn. ex DC. (unaccepted)
Species Aster chrysothamnus Kuntze (unaccepted)
Species Aster cichoriaceus (Greene) S.F.Blake (unaccepted)
Species Aster ciliaris Thunb. ex DC. (unaccepted)
Species Aster ciliaris Kuntze (unaccepted)
Species Aster ciliatus Nutt. (unaccepted)
Species Aster ciliatus (Ledeb.) B.Fedtsch. (unaccepted)
Species Aster ciliatus (Nutt.) Kuntze (unaccepted)
Species Aster ciliatus Muhl. ex Willd. (unaccepted)
Species Aster ciliolatus Lindl. (unaccepted)
Species Aster ciliosus (Turcz.) Hand.-Mazz. (unaccepted)
Species Aster ciliosus Kitam. (unaccepted)
Species Aster cinereus Korsh. (unaccepted)
Species Aster claviger E.S.Burgess (unaccepted)
Species Aster claytonii E.S.Burgess (unaccepted)
Species Aster coerulescens DC. (unaccepted)
Species Aster cognatus H.M.Hall (unaccepted)
Species Aster colchicus Albov (unaccepted)
Species Aster colensoi (Hook.f.) F.Muell. (unaccepted)
Species Aster collinsii Nutt. (unaccepted)
Species Aster collinus Salisb. (unaccepted)
Species Aster coloradoensis A.Gray (unaccepted)
Species Aster coloratus (Colenso) Kuntze (unaccepted)
Species Aster columbianus Piper (unaccepted)
Species Aster commixtus (Nees) Kuntze (unaccepted)
Species Aster commutatus (Torr. & A.Gray) A.Gray (unaccepted)
Species Aster commutatus Kuntze (unaccepted)
Species Aster concinnus Salisb. (unaccepted)
Species Aster concinnus Colla (unaccepted)
Species Aster concinnus Willd. (unaccepted)
Species Aster concolor L. (unaccepted)
Species Aster conduplicatus E.S.Burgess (unaccepted)
Species Aster confertiflorus (DC.) Kuntze (unaccepted)
Species Aster confertus Nees (unaccepted)
Species Aster confertus Desf. (unaccepted)
Species Aster confinis (A.Gray) Kuntze (unaccepted)
Species Aster confusus Harv. (unaccepted)
Species Aster conocephalus (F.Muell.) F.Muell. (unaccepted)
Species Aster consanguineus Ledeb. (unaccepted)
Species Aster conspicuus Fisch. ex Turcz. (unaccepted)
Species Aster conspicuus Lindl. (unaccepted)
Species Aster continuus Small (unaccepted)
Species Aster conyzae Griess. (unaccepted)
Species Aster conyzoides Willd. (unaccepted)
Species Aster conyzoides Desf. (unaccepted)
Species Aster cooperi (A.Gray) Kuntze (unaccepted)
Species Aster cordalenus L.F.Hend. (unaccepted)
Species Aster cordifolius L. (unaccepted)
Species Aster cordineri A.Nelson (unaccepted)
Species Aster coriaceifolius H.Lév. & Vaniot (unaccepted)
Species Aster coriaceiformis H.Lév. & Vaniot (unaccepted)
Species Aster coriaceus G.Forst. (unaccepted)
Species Aster coriaceus Hort. ex DC. (unaccepted)
Species Aster coridifolius Michx. (unaccepted)
Species Aster cornifolius Muhl. ex Willd. (unaccepted)
Species Aster cornuti Wendl. ex Nees (unaccepted)
Species Aster cornuti Mill. ex DC. (unaccepted)
Species Aster coronatus (Sch.Bip.) S.Y.Hu (unaccepted)
Species Aster coronopifolia (Nutt.) N.E.Br. (unaccepted)
Species Aster coronopifolius (A.Gray) Kuntze (unaccepted)
Species Aster corrigiatus E.S.Burgess (unaccepted)
Species Aster corymbosus (Harv.) Fourc. (unaccepted)
Species Aster corymbosus Moench (unaccepted)
Species Aster corymbosus Sol. ex Aiton (unaccepted)
Species Aster costei H.Lév. (unaccepted)
Species Aster covillei (Greene) S.F.Blake ex M.Peck (unaccepted)
Species Aster crassifolius Klatt (unaccepted)
Species Aster crassulus Rydb. (unaccepted)
Species Aster crenatifolius Hand.-Mazz. (unaccepted)
Species Aster crenatus (Thunb.) Less. (unaccepted)
Species Aster crenifolius (Fernald) Cronquist (unaccepted)
Species Aster crenulatus Hutch. (unaccepted)
Species Aster creticus (Gand.) Rech.f. (unaccepted)
Species Aster crinifer (Hook.f.) F.Muell. (unaccepted)
Species Aster crinitus Thunb. (unaccepted)
Species Aster crinitus L. (unaccepted)
Species Aster crispus Forssk. (unaccepted)
Species Aster crithmifolius (L.) Cav. (unaccepted)
Species Aster crocatus Bertol. (unaccepted)
Species Aster croceus (A.Gray) Kuntze (unaccepted)
Species Aster crocifolius Kunth (unaccepted)
Species Aster culminis A.Nelson (unaccepted)
Species Aster cuneatus A.Cunn. ex Steud. (unaccepted)
Species Aster cuneatus (A.Gray) Kuntze (unaccepted)
Species Aster cuneifolius (Nutt.) Kuntze (unaccepted)
Species Aster cunninghamii (Hook.f.) F.Muell. (unaccepted)
Species Aster curtisii Torr. & A.Gray (unaccepted)
Species Aster curtus Cronquist (unaccepted)
Species Aster cusickii A.Gray (unaccepted)
Species Aster cyaneus Hoffm. (unaccepted)
Species Aster cyanodiscus F.Muell. (unaccepted)
Species Aster cydoniifolius A.Cunn. ex DC. (unaccepted)
Species Aster cylleneus Orphan. ex Nyman (unaccepted)
Species Aster cylleneus (Boiss. & Orph.) Halácsy (unaccepted)
Species Aster cymbalariae Aiton (unaccepted)
Species Aster cymbalariodes (DC.) Kuntze (unaccepted)
Species Aster dahuricus (DC.) B.Fedtsch. (unaccepted)
Species Aster dahuricus (DC.) Benth. ex Baker (unaccepted)
Species Aster daltonis F.Muell. (unaccepted)
Species Aster debilis Bojer ex DC. (unaccepted)
Species Aster decemflora Nutt. (unaccepted)
Species Aster decemflorus Kuntze (unaccepted)
Species Aster decorus Desf. ex DC. (unaccepted)
Species Aster decumbens Baker (unaccepted)
Species Aster decurrens (DC.) F.Muell. (unaccepted)
Species Aster decurrens A.Cunn. ex DC. (unaccepted)
Species Aster decurrens Moench (unaccepted)
Species Aster deflexus Moench (unaccepted)
Species Aster defoliatus Parish (unaccepted)
Species Aster delavayi Franch. (unaccepted)
Species Aster delectabilis H.M.Hall (unaccepted)
Species Aster densiflorus (Hook.f.) F.Muell. (unaccepted)
Species Aster densifolius (J.Rémy) Kuntze (unaccepted)
Species Aster dentatus Andrews (unaccepted)
Species Aster dentatus Thunb. (unaccepted)
Species Aster denticulatus (Phil.) Kuntze (unaccepted)
Species Aster denudatus Nutt. (unaccepted)
Species Aster depauperatus Fernald (unaccepted)
Species Aster depauperatus H.Lév. & Vaniot (unaccepted)
Species Aster depressus Kit. (unaccepted)
Species Aster depressus (A.Gray) Kuntze (unaccepted)
Species Aster deserticola J.F.Macbr. (unaccepted)
Species Aster desertorum Tchertk. (unaccepted)
Species Aster diabolicus Piper (unaccepted)
Species Aster dichotomus Elliott (unaccepted)
Species Aster dieteria Kuntze (unaccepted)
Species Aster diffusus Aiton (unaccepted)
Species Aster diplopappus (J.Rémy) Kuntze (unaccepted)
Species Aster discoideus Boiss. & Reut. (unaccepted)
Species Aster discoideus Sond. (unaccepted)
Species Aster discoideus Elliott (unaccepted)
Species Aster discoideus Sond. ex Harv. & Sand. (unaccepted)
Species Aster distortus Turcz. ex Avé-Lall. (unaccepted)
Species Aster divaricatus L. (unaccepted)
Species Aster divaricatus Baker (unaccepted)
Species Aster divaricatus (M.Bieb.) Schmalh. (unaccepted)
Species Aster divaricatus (Nutt.) Kuntze (unaccepted)
Species Aster divaricatus (Nutt.) Torr. & A.Gray (unaccepted)
Species Aster divergens Dryand. ex Aiton (unaccepted)
Species Aster diversifolius Michx. (unaccepted)
Species Aster doellianus (Phil.) Kuntze (unaccepted)
Species Aster douglasii Lindl. (unaccepted)
Species Aster douglasii D.C.Eaton (unaccepted)
Species Aster dracunculoides Willd. (unaccepted)
Species Aster dracunculoides Lam. (unaccepted)
Species Aster dregei (DC.) Harv. (unaccepted)
Species Aster drummondii Lindl. ex Hook. (unaccepted)
Species Aster drummondii Lindl. (unaccepted)
Species Aster dubius (Thunb.) Hultén (unaccepted)
Species Aster dubius (Thunb.) Onno (unaccepted)
Species Aster dubius (Thunb.) Onno ex Kitam. (unaccepted)
Species Aster dumosus L. (unaccepted)
Species Aster durandii Kuntze (unaccepted)
Species Aster durandii Nutt. ex Durand (unaccepted)
Species Aster durus Lunell (unaccepted)
Species Aster dysentericus (L.) Scop. (unaccepted)
Species Aster eatonii (A.Gray) Howell (unaccepted)
Species Aster echinatus (Thunb.) Less. (unaccepted)
Species Aster ecklonis Less. (unaccepted)
Species Aster edwardii Kuntze (unaccepted)
Species Aster elaeagnifolius A.Cunn. ex DC. (unaccepted)
Species Aster elaeophilus A.Cunn. ex DC. (unaccepted)
Species Aster elaeophilus (DC.) F.Muell. (unaccepted)
Species Aster elatus Bertero ex Steud. (unaccepted)
Species Aster elatus (Greene) Cronquist (unaccepted)
Species Aster elegans (Nutt.) Torr. & A.Gray (unaccepted)
Species Aster elegans Nees (unaccepted)
Species Aster elegans Willd. (unaccepted)
Species Aster elegans Hook.f. & Thomson ex C.B.Clarke (unaccepted)
Species Aster elegantulus A.E.Porsild (unaccepted)
Species Aster eliasii A.Nelson (unaccepted)
Species Aster elliottii Torr. & A.Gray (unaccepted)
Species Aster ellipticus A.Cunn. ex DC. (unaccepted)
Species Aster elmeri Piper (unaccepted)
Species Aster elmeri Greene (unaccepted)
Species Aster elodes Torr. & A.Gray (unaccepted)
Species Aster elongatus Thunb. (unaccepted)
Species Aster elongatus (Nutt.) Kuntze (unaccepted)
Species Aster elongifolius A.Cunn. (unaccepted)
Species Aster eminens Willd. (unaccepted)
Species Aster engelmannii (D.C.Eaton) A.Gray (unaccepted)
Species Aster ensifolius Scop. (unaccepted)
Species Aster eradiatus (A.Gray) Frye & Rigg (unaccepted)
Species Aster erectus (Remy) Reiche (unaccepted)
Species Aster erectus (J.Rémy) Kuntze (unaccepted)
Species Aster eremophila Bunge (unaccepted)
Species Aster eremophilus Bunge (unaccepted)
Species Aster ericifolius Rothr. (unaccepted)
Species Aster ericifolius Forssk. (unaccepted)
Species Aster ericina Kuntze (unaccepted)
Species Aster ericoides L. (unaccepted)
Species Aster erigeroides Hook. & Arn. (unaccepted)
Species Aster erigeroides (DC.) Harv. (unaccepted)
Species Aster erigeron E.H.L.Krause (unaccepted)
Species Aster eriophorus (J.Rémy) Kuntze (unaccepted)
Species Aster eriophorus (J.Rémy) Reiche (unaccepted)
Species Aster erubescens Sieber ex Benth. (unaccepted)
Species Aster eryngiifolius Torr. & A.Gray (unaccepted)
Species Aster espenbergensis Nees (unaccepted)
Species Aster esquirolii H.Lév. (unaccepted)
Species Aster eulae Shinners (unaccepted)
Species Aster euthamia Kuntze (unaccepted)
Species Aster exasperatus Link (unaccepted)
Species Aster excavatus E.S.Burgess (unaccepted)
Species Aster excorticatus (Buchanan) Kuntze (unaccepted)
Species Aster exiguus (Fernald) Rydb. (unaccepted)
Species Aster exilifolius F.Muell. (unaccepted)
Species Aster exilis Elliott (unaccepted)
Species Aster expansus Nees (unaccepted)
Species Aster exscapus Richardson (unaccepted)
Species Aster exsul Lindl. (unaccepted)
Species Aster exul Lindl. (unaccepted)
Species Aster eylesii (S.Moore) Milne-Redh. (unaccepted)
Species Aster falcatus D.C.Eaton (unaccepted)
Species Aster falcatus Lindl. ex DC. (unaccepted)
Species Aster falcatus Lindl. (unaccepted)
Species Aster falcidens E.S.Burgess (unaccepted)
Species Aster fallax Tamamsch. (unaccepted)
Species Aster fascicularis E.Mey. ex DC. (unaccepted)
Species Aster fastigiatus Ledeb. (unaccepted)
Species Aster fauriei H.Lév. & Vaniot (unaccepted)
Species Aster fauriei Tamamsch. (unaccepted)
Species Aster faxonii Porter (unaccepted)
Species Aster feddei H.Lév. & Vaniot (unaccepted)
Species Aster fendleri A.Gray (unaccepted)
Species Aster ferdinandi Kuntze (unaccepted)
Species Aster ferrugineus (unaccepted)
Species Aster ferrugineus Edgew. (unaccepted)
Species Aster ficoideus (DC.) Harv. (unaccepted)
Species Aster fiebrigii Hieron. (unaccepted > junior subjective synonym, Nom. in sched.)
Species Aster filaginifolius Hook. & Arn. (unaccepted)
Species Aster filifolius Vent. (unaccepted)
Species Aster filifolius Willd. ex Nees (unaccepted)
Species Aster filiformis Eckl. ex DC. (unaccepted)
Species Aster filiformis Steud. (unaccepted)
Species Aster finkii Rydb. (unaccepted)
Species Aster firmus Nees (unaccepted)
Species Aster fischeri Kuntze (unaccepted)
Species Aster fistulosus (Mill.) Kuntze (unaccepted)
Species Aster flabellum Vaniot (unaccepted)
Species Aster flavovirens (Chapm.) Kuntze (unaccepted)
Species Aster flexicaulis Raf. (unaccepted)
Species Aster flexilis E.S.Burgess (unaccepted)
Species Aster flexuosus Nutt. (unaccepted)
Species Aster flexuosus Fisch. (unaccepted)
Species Aster flexuosus (Royle ex DC.) Kuntze (unaccepted)
Species Aster floribundus Willd. (unaccepted)
Species Aster florulentus F.Muell. (unaccepted)
Species Aster fluvialis Osterh. (unaccepted)
Species Aster foliaceus Lindl. ex DC. (unaccepted)
Species Aster foliolosus Dryand. ex Aiton (unaccepted)
Species Aster foliolosus Elliott (unaccepted)
Species Aster foliosus (DC.) Kuntze (unaccepted)
Species Aster foliosus Pers. (unaccepted)
Species Aster fontinalis Alexander (unaccepted)
Species Aster formosus Kuntze (unaccepted)
Species Aster forrestii Stapf (unaccepted)
Species Aster forsteri (Hook.f.) F.Muell. (unaccepted)
Species Aster forsteri (Hook.f.) Kuntze (unaccepted)
Species Aster forwoodii S.Watson (unaccepted)
Species Aster fragilis Willd. (unaccepted)
Species Aster franchetianus H.Lév. (unaccepted)
Species Aster franklinianus Rydb. (unaccepted)
Species Aster fremontii (Torr. & A.Gray) A.Gray (unaccepted)
Species Aster frondeus (A.Gray) Greene (unaccepted)
Species Aster frondosus (Nutt.) Torr. & A.Gray (unaccepted)
Species Aster frutescens S.Watson (unaccepted)
Species Aster frutetorum Wimm. ex Nyman (unaccepted)
Species Aster fruticosus L. (unaccepted)
Species Aster fruticulosus L. (unaccepted)
Species Aster fruticulosus Willd. (unaccepted)
Species Aster fugax Brot. (unaccepted)
Species Aster fulvidus (Archer) Kuntze (unaccepted)
Species Aster furcatus E.S.Burgess (unaccepted)
Species Aster furfuraceus A.Rich. & Lesson (unaccepted)
Species Aster furfuraceus A.Rich. (unaccepted)
Species Aster fusanensis H.Lév. & Vaniot (unaccepted)
Species Aster ganlun Kitam. (unaccepted)
Species Aster garibaldii Brügger (unaccepted)
Species Aster gaspensis Vict. (unaccepted)
Species Aster gattingeri Alexander (unaccepted)
Species Aster gattingeri Kuntze (unaccepted)
Species Aster gayanus DC. (unaccepted)
Species Aster gebleri Besser ex DC. (unaccepted)
Species Aster gentryi Standl. (unaccepted)
Species Aster georgianus Alexander (unaccepted)
Species Aster germanicus (L.) Cav. (unaccepted)
Species Aster geyeri (A.Gray) Howell (unaccepted)
Species Aster giganteus (Hook.) Rydb. (unaccepted)
Species Aster giganteus Hort. ex Vilm. (unaccepted)
Species Aster gilliesii Hook. & Arn. (unaccepted)
Species Aster glabellus Nees (unaccepted)
Species Aster glaber E.Mey. ex Nees (unaccepted)
Species Aster glabratus (Greene) S.F.Blake ex M.Peck (unaccepted)
Species Aster glabratus (Phil.) Kuntze (unaccepted)
Species Aster glabratus (DC.) Korsh. (unaccepted)
Species Aster glabratus (Hoppe & Hornsch.) E.H.L.Krause (unaccepted)
Species Aster glabratus (Lindl. ex DC.) B.Fedtsch. (unaccepted)
Species Aster glabrifolius (DC.) Reiche (unaccepted)
Species Aster glabriuscula (Nutt.) Torr. & A.Gray (unaccepted)
Species Aster glacialis Nutt. (unaccepted)
Species Aster glandulosus (Keissl.) Hand.-Mazz. (unaccepted)
Species Aster glaucescens Wender. ex Nees (unaccepted)
Species Aster glaucescens (A.Gray) S.F.Blake (unaccepted)
Species Aster glaucodes S.F.Blake (unaccepted)
Species Aster glaucophyllus (Piper) Frye & Rigg (unaccepted)
Species Aster glaucus (Ker Gawl.) Pépin (unaccepted)
Species Aster glaucus Nees (unaccepted)
Species Aster glaucus (Nutt.) Torr. & A.Gray (unaccepted)
Species Aster glomeratus (Michx.) Kuntze (unaccepted)
Species Aster glomeratus (Bernh. ex Nees) (unaccepted)
Species Aster glossophyllus Piper (unaccepted)
Species Aster glutescens (Sond.) F.Muell. (unaccepted)
Species Aster glutinosus (Less.) Kuntze (unaccepted)
Species Aster glutinosus Cav. (unaccepted)
Species Aster glutinosus Roxb. (unaccepted)
Species Aster gmelinii Ledeb. (unaccepted)
Species Aster gnaphalioides (Baker) Hassl. (unaccepted)
Species Aster gooddingii Onno (unaccepted)
Species Aster gormanii (Piper) S.F.Blake (unaccepted)
Species Aster gouldii C.E.C.Fisch. (unaccepted)
Species Aster gracilentus Torr. & A.Gray (unaccepted)
Species Aster gracilentus Banks ex DC. (unaccepted)
Species Aster gracilescens E.S.Burgess (unaccepted)
Species Aster gracilicaulis Y.Ling (unaccepted)
Species Aster gracilipes (Wiegand) Alexander (unaccepted)
Species Aster gracilipes (Wiegand) Alexander ex Small (unaccepted)
Species Aster gracilis Nutt. (unaccepted)
Species Aster gracillimus (Torr. & A.Gray) Kuntze (unaccepted)
Species Aster graminifolius Pursh (unaccepted)
Species Aster graminifolius (L.) Kuntze (unaccepted)
Species Aster grandiflorus L. (unaccepted)
Species Aster grauii W.Lippert (unaccepted)
Species Aster graveolens Nutt. (unaccepted)
Species Aster graveolens (Nutt.) Kuntze (unaccepted)
Species Aster gravesii E.S.Burgess (unaccepted)
Species Aster gravis F.Muell. (unaccepted)
Species Aster grayi Suksd. (unaccepted)
Species Aster greatae Parish (unaccepted)
Species Aster greenei (A.Gray) Kuntze (unaccepted)
Species Aster grimmii (Regel & Schmalh.) B.Fedtsch. (unaccepted)
Species Aster grindelioides (DC.) Kuntze (unaccepted)
Species Aster grisebachii Britton (unaccepted)
Species Aster griseus Greene (unaccepted)
Species Aster griseus Kuntze (unaccepted)
Species Aster grossedentatus Dinter (unaccepted)
Species Aster guiradonis (A.Gray) Kuntze (unaccepted)
Species Aster gummiferus Hook.f. (unaccepted)
Species Aster gymnocephalus (DC.) A.Gray (unaccepted)
Species Aster gymnocephalus (Rupr.) B.Fedtsch. (unaccepted)
Species Aster gypsophilus B.L.Turner (unaccepted)
Species Aster haastii (Hook.f.) Kuntze (unaccepted)
Species Aster hallii A.Gray (unaccepted)
Species Aster haplopappus (J.Rémy) Reiche (unaccepted)
Species Aster haplopappus (J.Rémy) Kuntze (unaccepted)
Species Aster harbourii Kuntze (unaccepted)
Species Aster hartwegii (A.Gray) Kuntze (unaccepted)
Species Aster hashimotoi Kitam. (unaccepted)
Species Aster hauptii Turcz. ex DC. (unaccepted)
Species Aster hauptii Ledeb. (unaccepted)
Species Aster haydenii Porter (unaccepted)
Species Aster hebecladus DC. (unaccepted)
Species Aster hectori (Hook.f.) Kuntze (unaccepted)
Species Aster hedinii Ostenf. (unaccepted)
Species Aster helenium (L.) Scop. (unaccepted)
Species Aster heleophilus F.Muell. (unaccepted)
Species Aster hemisphericus Alexander (unaccepted)
Species Aster hemsleyi Kuntze (unaccepted)
Species Aster hendersonii Fernald (unaccepted)
Species Aster herveyi A.Gray (unaccepted)
Species Aster hesperius A.Gray (unaccepted)
Species Aster heterochaeta Benth. & Clarke (unaccepted)
Species Aster heterochaeta Benth. ex C.B.Clarke (unaccepted)
Species Aster heteromallus Wender. (unaccepted)
Species Aster heterophyllus (A.Gray) Kuntze (unaccepted)
Species Aster heterophyllus Thunb. (unaccepted)
Species Aster heterophyllus Willd. (unaccepted)
Species Aster heterotrichus Hara (unaccepted)
Species Aster heynei F.Muell. (unaccepted)
Species Aster hiemalis Nees (unaccepted)
Species Aster hintonii G.L.Nesom (unaccepted)
Species Aster hirsuticaulis Lindl. ex DC. (unaccepted)
Species Aster hirsutus Host (unaccepted)
Species Aster hirsutus (Vent.) Harv. (unaccepted)
Species Aster hirtellus Lindl. ex DC. (unaccepted)
Species Aster hirtellus (Phil.) Kuntze (unaccepted)
Species Aster hirtellus Lindl. (unaccepted)
Species Aster hirtifolius S.F.Blake (unaccepted)
Species Aster hirtus Thunb. (unaccepted)
Species Aster hirtus K.Koch (unaccepted)
Species Aster hirtus (DC.) Harv. (unaccepted)
Species Aster hirtus Scop. (unaccepted)
Species Aster hispanicus Coincy (unaccepted)
Species Aster hispidulus (DC.) Kuntze (unaccepted)
Species Aster hispidus Thunb. (unaccepted)
Species Aster hispidus Lam. (unaccepted)
Species Aster hispidus (Muhl. ex Willd.) Kuntze (unaccepted)
Species Aster hispidus (Thunb.) Baker (unaccepted)
Species Aster hispidus Murray (unaccepted)
Species Aster holophyllus Hemsl. (unaccepted)
Species Aster holosericeus G.Forst. (unaccepted)
Species Aster homochlamydeus Hand.-Mazz. (unaccepted)
Species Aster homolepis F.Muell. (unaccepted)
Species Aster hookeri F.Muell. ex Benth. (unaccepted)
Species Aster hookerianus (Torr. & A.Gray) Kuntze (unaccepted)
Species Aster hoorebekia (DC.) Kuntze (unaccepted)
Species Aster horizontalis Desf. (unaccepted)
Species Aster horridifolius H.Lév. & Vaniot (unaccepted)
Species Aster horridus (Wooton & Standl.) S.F.Blake (unaccepted)
Species Aster houghtonii (Torr. & A.Gray) Kuntze (unaccepted)
Species Aster howardii (Parry ex A.Gray) Kuntze (unaccepted)
Species Aster howellii Kuntze (unaccepted)
Species Aster huegelii F.Muell. (unaccepted)
Species Aster humilis Willd. (unaccepted)
Species Aster humilis Banks & Sol. ex Hook.f. (unaccepted)
Species Aster hungaricus Poir. (unaccepted)
Species Aster hydrabadensis Wall. (unaccepted)
Species Aster hydrophilus Greene ex Wooton & Standl. (unaccepted)
Species Aster hygrophilus A.Cunn. ex DC. (unaccepted)
Species Aster hyssopifolius L. (unaccepted)
Species Aster hyssopifolius P.J.Bergius (unaccepted)
Species Aster hyssopifolius Cav. (unaccepted)
Species Aster ibericus Steven ex M.Bieb. (unaccepted)
Species Aster ignoratus Kunth & C.D.Bouché (unaccepted)
Species Aster iinumae Kitam. (unaccepted)
Species Aster ilicifolius A.Cunn. ex DC. (unaccepted)
Species Aster ilicifolius (Hook.f.) F.Muell. (unaccepted)
Species Aster ilicifolius (J.Rémy) Kuntze (unaccepted)
Species Aster illinitus (Phil.) Kuntze (unaccepted)
Species Aster illitus (F.Muell.) F.Muell. (unaccepted)
Species Aster illyricus (Murb.) K.Malý (unaccepted)
Species Aster imbricatus Walp. (unaccepted)
Species Aster imbricatus L. (unaccepted)
Species Aster imbricatus (DC.) Harv. (unaccepted)
Species Aster incanopilosus (Lindl.) E.Sheld. (unaccepted)
Species Aster incanus (Lindl.) A.Gray (unaccepted)
Species Aster incisus Fisch. (unaccepted)
Species Aster inconspicuus Less. (unaccepted)
Species Aster infirmus Michx. (unaccepted)
Species Aster inornatus Greene (unaccepted)
Species Aster insignis (Hook.f.) F.Muell. (unaccepted)
Species Aster insularis Makino (unaccepted)
Species Aster integrifolius (Turcz. ex DC.) Franch. (unaccepted)
Species Aster integrifolius Nutt. (unaccepted)
Species Aster interior Wiegand (unaccepted)
Species Aster intermedius Turcz. ex DC. (unaccepted)
Species Aster intricatus (A.Gray) S.F.Blake (unaccepted)
Species Aster intybaceus Kunth & C.D.Bouché (unaccepted)
Species Aster inulifolius Boiss. & Balansa (unaccepted)
Species Aster inuloides D.Don (unaccepted)
Species Aster invenustus Greene (unaccepted)
Species Aster iodochrous (F.Muell.) F.Muell. (unaccepted)
Species Aster ircutianus DC. (unaccepted)
Species Aster jacksonii Kuntze (unaccepted)
Species Aster jalapensis Fernald (unaccepted)
Species Aster jamaicensis (L.) Less. (unaccepted)
Species Aster japonicus (Miq.) Franch. & Sav. (unaccepted)
Species Aster javanicus Garcin ex Burm.f. (unaccepted)
Species Aster jessicae Suksd. (unaccepted)
Species Aster jessicae Piper (unaccepted)
Species Aster johannensis Fernald (unaccepted)
Species Aster jonesiae Lamboy (unaccepted)
Species Aster junceus Aiton (unaccepted)
Species Aster junciformis Rydb. (unaccepted)
Species Aster juniperinus E.S.Burgess (unaccepted)
Species Aster jussiei (Coss.) E.S.Burgess (unaccepted)
Species Aster kaempferi A.Gray (unaccepted)
Species Aster kawaguchii Kitam. (unaccepted)
Species Aster kentuckiensis Britton (unaccepted)
Species Aster kernotii F.Muell. (unaccepted)
Species Aster kingii D.C.Eaton (unaccepted)
Species Aster kirghisorum (Fisch. ex M.Bieb.) Korsh. (unaccepted)
Species Aster koidzumianus Makino (unaccepted)
Species Aster koidzumianus (Kitam.) Nemoto (unaccepted)
Species Aster komarovii H.Lév. & Vaniot (unaccepted)
Species Aster kootenayi A.Nelson & J.F.Macbr. (unaccepted)
Species Aster koraiensis Nakai (unaccepted)
Species Aster korsakoviensis H.Lév. & Vaniot (unaccepted)
Species Aster korshinskyi Tamamsch. (unaccepted)
Species Aster kraussii (Sch.Bip. ex Sch.Bip.) Harv. (unaccepted)
Species Aster kumleinii Fr. ex A.Gray (unaccepted)
Species Aster labrangensis Hand.-Mazz. (unaccepted)
Species Aster lacerus Lindl. ex DC. (unaccepted)
Species Aster lacinians Borbás (unaccepted)
Species Aster lacunarum Aitch. & Hemsl. (unaccepted)
Species Aster lacunosus (Hook.f.) Kuntze (unaccepted)
Species Aster laetevirens Greene (unaccepted)
Species Aster laetus Fisch. ex Ledeb. (unaccepted)
Species Aster laevigatus Lam. (unaccepted)
Species Aster laevigatus Willd. (unaccepted)
Species Aster laevis L. (unaccepted)
Species Aster lamarckianus Nees (unaccepted)
Species Aster lanatus (Hook.f.) Kuntze (unaccepted)
Species Aster lanceolatus Willd. (unaccepted)
Species Aster lancifolius (Torr. & A.Gray) Kuntze (unaccepted)
Species Aster lanuginosus Kuntze (unaccepted)
Species Aster lanuginosus (J.Small) Y.Ling (unaccepted)
Species Aster lanuginosus H.L.Wendl. (unaccepted)
Species Aster laricifolius (A.Gray) Kuntze (unaccepted)
Species Aster laricifolius (Hook.f.) F.Muell. (unaccepted)
Species Aster lasiocarpus (DC.) Harv. (unaccepted)
Species Aster lastarrianus (J.Rémy) Kuntze (unaccepted)
Species Aster lateralis hort.bonn. ex Nees (unaccepted)
Species Aster lateriflorus (L.) Britton (unaccepted)
Species Aster laticorymbus Vaniot (unaccepted)
Species Aster latifolius (L.) Kuntze (unaccepted)
Species Aster latifolius Desf. (unaccepted)
Species Aster latifolius Mill. (unaccepted)
Species Aster latifolius Banks ex Steud. (unaccepted)
Species Aster latissimifolius (Mill.) Kuntze (unaccepted)
Species Aster laurentianus Fernald (unaccepted)
Species Aster lautureanus (Debeaux) Franch. (unaccepted)
Species Aster lautus Lunell (unaccepted)
Species Aster lavandulaceus Willd. (unaccepted)
Species Aster lavandulaceus Willd. ex DC. (unaccepted)
Species Aster laxiflorus Lindl. (unaccepted)
Species Aster laxifolius Nees (unaccepted)
Species Aster laxus Benth. (unaccepted)
Species Aster laxus Torr. & A.Gray (unaccepted)
Species Aster laxus Willd. (unaccepted)
Species Aster leavenworthii (Torr. & A.Gray) Kuntze (unaccepted)
Species Aster ledifolius A.Cunn. ex DC. (unaccepted)
Species Aster ledifolius Pursh (unaccepted)
Species Aster ledophyllus (A.Gray) A.Gray (unaccepted)
Species Aster lehmannii F.Muell. (unaccepted)
Species Aster leiocarpus (DC.) Harv. (unaccepted)
Species Aster leiodes S.F.Blake (unaccepted)
Species Aster leiophyllus Franch. & Sav. (unaccepted)
Species Aster leiophyllus Porter (unaccepted)
Species Aster leiophyllus Schloss. & Vuk. (unaccepted)
Species Aster leiospermus (A.Gray) Kuntze (unaccepted)
Species Aster lemmonii A.Gray (unaccepted)
Species Aster lentus Greene (unaccepted)
Species Aster lepidophyllus Pers. (unaccepted)
Species Aster lepidopodus B.L.Rob. & Fernald (unaccepted)
Species Aster lepidus (DC.) Kuntze (unaccepted)
Species Aster leptocephalus (Torr. & A.Gray) Kuntze (unaccepted)
Species Aster leptocladus Makino (unaccepted)
Species Aster leptophyllus hort.par. ex DC. (unaccepted)
Species Aster leucanthemifolius Greene (unaccepted)
Species Aster leucanthemus Desf. (unaccepted)
Species Aster leucelene S.F.Blake (unaccepted)
Species Aster leucopappus (Phil.) Reiche (unaccepted)
Species Aster liatroides Muhl. ex DC. (unaccepted)
Species Aster liburnicus (Spreng.) Rouy (unaccepted)
Species Aster likiangensis Franch. (unaccepted)
Species Aster lima Lindl. (unaccepted)
Species Aster lima Lindl. ex DC. (unaccepted)
Species Aster limitaneus W.W.Sm. & Farrer (unaccepted)
Species Aster limnophilus (Sch.Bip.) Hemsl. & Pearson (unaccepted)
Species Aster linariifolius L. (unaccepted)
Species Aster lindheimerianus (Scheele) Kuntze (unaccepted)
Species Aster lindleyanus Torr. & A.Gray (unaccepted)
Species Aster linearifolius (DC.) Kuntze (unaccepted)
Species Aster linearis (Greene) Cory (unaccepted)
Species Aster linguiformis E.S.Burgess (unaccepted)
Species Aster linifolius Griseb. (unaccepted)
Species Aster linifolius Torr. & A.Gray (unaccepted)
Species Aster linifolius L. (unaccepted)
Species Aster linifolius Burm.f. (unaccepted)
Species Aster linifolius Harv. (unaccepted)
Species Aster linodes (Phil.) Kuntze (unaccepted)
Species Aster linoides hort.gaybac. ex DC. (unaccepted)
Species Aster linosyris (L.) Bernh. (unaccepted)
Species Aster liratus Sims (unaccepted)
Species Aster lithospermifolius Desf. (unaccepted)
Species Aster litoralis Phil. (unaccepted)
Species Aster lofouensis H.Lév. & Vaniot (unaccepted)
Species Aster lonchophyllus Greene (unaccepted)
Species Aster longicaulis Desf. ex DC. (unaccepted)
Species Aster longicaulis (DC.) Dufour (unaccepted)
Species Aster longifolius Lam. (unaccepted)
Species Aster longipes (Phil.) Kuntze (unaccepted)
Species Aster longipes Gardner (unaccepted)
Species Aster longipetiolatus C.C.Chang (unaccepted)
Species Aster longulus E.Sheld. (unaccepted)
Species Aster loriformis (E.S.Burgess) E.S.Burgess (unaccepted)
Species Aster lowrieanus Porter (unaccepted)
Species Aster lucayanus Britton (unaccepted)
Species Aster lucens Kitam. (unaccepted)
Species Aster lucidulus (A.Gray) Rydb. (unaccepted)
Species Aster lucidulus (A.Gray) Wiegand (unaccepted)
Species Aster lucidus Hort.Kew. ex Loudon (unaccepted)
Species Aster lucidus Wender. (unaccepted)
Species Aster lusitanicus Brot. (unaccepted)
Species Aster lutescens (Lindl. ex DC.) Torr. & A.Gray (unaccepted)
Species Aster luteus (N.E.Br.) Hutch. (unaccepted)
Species Aster luxurians Spreng. (unaccepted)
Species Aster luxurifolius Tamamsch. (unaccepted)
Species Aster lyallii (Hook.f.) F.Muell. (unaccepted)
Species Aster lyratus Nees (unaccepted)
Species Aster maccallae Rydb. (unaccepted)
Species Aster macilentus Vaniot (unaccepted)
Species Aster mackaui (Raoul) F.Muell. (unaccepted)
Species Aster macounii Rydb. (unaccepted)
Species Aster macraeanus (J.Rémy) Kuntze (unaccepted)
Species Aster macrocephalus Kuntze (unaccepted)
Species Aster macrocephalus (Baker) Hassl. (unaccepted)
Species Aster macrodon H.Lév. & Vaniot (unaccepted)
Species Aster macrodpm Lév. & Vaniot (unaccepted)
Species Aster macrolophus H.Lév. & Vaniot (unaccepted)
Species Aster macronema (A.Gray) Kuntze (unaccepted)
Species Aster macrophyllus L. (unaccepted)
Species Aster macrorrhizus Thunb. (unaccepted)
Species Aster macrorrhizus A.Cunn. ex DC. (unaccepted)
Species Aster madagascariensis (Humbert) Humbert (unaccepted)
Species Aster madrensis M.E.Jones (unaccepted)
Species Aster magellanicus Spreng. (unaccepted)
Species Aster magniflorus F.Muell. (unaccepted)
Species Aster major (Hook.) Porter (unaccepted)
Species Aster majus (Hook.) Porter (unaccepted)
Species Aster mandrarensis Humbert (unaccepted)
Species Aster mangtaoensis Kitag. (unaccepted)
Species Aster marcusii Kuntze (unaccepted)
Species Aster marginalis (Phil.) Kuntze (unaccepted)
Species Aster marginatus Kunth (unaccepted)
Species Aster maritimus Salisb. (unaccepted)
Species Aster marshallii Kuntze (unaccepted)
Species Aster martii Baker (unaccepted)
Species Aster marylandicus Michx. (unaccepted)
Species Aster maximus (D.Don) Less. (unaccepted)
Species Aster mayasanensis Kitam. (unaccepted)
Species Aster mearnsii Rydb. (unaccepted)
Species Aster mediterraneus Soó (unaccepted)
Species Aster medius (Krylov) Serg. (unaccepted)
Species Aster megalodontus F.Muell. (unaccepted)
Species Aster megalophyllus (F.Muell.) F.Muell. (unaccepted)
Species Aster mekongensis Onno (unaccepted)
Species Aster menziesii Lindl. ex DC. (unaccepted)
Species Aster meritus A.Nelson (unaccepted)
Species Aster mespilifolius Less. (unaccepted)
Species Aster mexicanus (L.) Kuntze (unaccepted)
Species Aster meyendorffii (Regel & Maack) Voss (unaccepted)
Species Aster meyenii (Walp.) Kuntze (unaccepted)
Species Aster micranthus H.Lév. & Vaniot (unaccepted)
Species Aster microcephalus (Miq.) Franch. & Sav. (unaccepted)
Species Aster micromaackii Nakai (unaccepted)
Species Aster microphyllus Labill. (unaccepted)
Species Aster microphyllus Vent. (unaccepted)
Species Aster microspermus (DC.) Harv. (unaccepted)
Species Aster millefolius Vaniot (unaccepted)
Species Aster minimus Hutch. (unaccepted)
Species Aster minor (A.Gray) Kuntze (unaccepted)
Species Aster minutus (L.) Kuntze (unaccepted)
Species Aster mirabilis Torr. & A.Gray (unaccepted)
Species Aster miser Nutt. (unaccepted)
Species Aster miser Dryand. ex Aiton (unaccepted)
Species Aster miser Lam. (unaccepted)
Species Aster missouriensis (Nutt.) Kuntze (unaccepted)
Species Aster missouriensis Britton (unaccepted)
Species Aster mitchellii F.Muell. (unaccepted)
Species Aster miyabeanus Tatew. & Kitam. (unaccepted)
Species Aster modestus Lindl. (unaccepted)
Species Aster moelleri (Phil.) Reiche (unaccepted)
Species Aster mohavensis J.M.Coult. (unaccepted)
Species Aster mohavensis (Greene) Kuntze (unaccepted)
Species Aster mohavensis Coville (unaccepted)
Species Aster mohrii E.S.Burgess (unaccepted)
Species Aster mollis Rydb. (unaccepted)
Species Aster monactis (A.Gray) Kuntze (unaccepted)
Species Aster mongolicus Franch. (unaccepted)
Species Aster monocephalus Boiss. (unaccepted)
Species Aster montanus R.Br. (unaccepted)
Species Aster montanus R.Br. ex Richardson (unaccepted)
Species Aster montanus Nutt. (unaccepted)
Species Aster montanus All. (unaccepted)
Species Aster montevidensis (Spreng.) Griseb. (unaccepted)
Species Aster monticolus Kuntze (unaccepted)
Species Aster monticolus Lindl. ex DC. (unaccepted)
Species Aster moschatus Hort. ex Colla (unaccepted)
Species Aster moschatus (Hook.f.) F.Muell. (unaccepted)
Species Aster moupinensis (Franch.) Hand.-Mazz. (unaccepted)
Species Aster muehlenbergianus Kuntze (unaccepted)
Species Aster muehlenbergii Tausch (unaccepted)
Species Aster muelleri (Sond.) F.Muell. (unaccepted)
Species Aster muirii (A.Gray) Onno (unaccepted)
Species Aster multibracteolatus (Colenso) Kuntze (unaccepted)
Species Aster multicaulis Kuntze (unaccepted)
Species Aster multiceps Lindl. ex DC. (unaccepted)
Species Aster multiflorus Nutt. (unaccepted)
Species Aster multiflorus Dryand. ex Aiton (unaccepted)
Species Aster multifolius (Phil. ex Reiche) Kuntze (unaccepted)
Species Aster multiformis E.S.Burgess (unaccepted)
Species Aster multiradiatus (Aiton) Kuntze (unaccepted)
Species Aster multiradiatus Wall. (unaccepted)
Species Aster muricatus (Steetz) F.Muell. (unaccepted)
Species Aster muricatus Thunb. (unaccepted)
Species Aster mutabilis Willd. (unaccepted)
Species Aster mutabilis Dryand. ex Aiton (unaccepted)
Species Aster mutatus Torr. & A.Gray (unaccepted)
Species Aster mutisianus Cuatrec. (unaccepted)
Species Aster myrsinoides Labill. (unaccepted)
Species Aster myrtifolius Willd. (unaccepted)
Species Aster nahanniensis Cody (unaccepted)
Species Aster nakaii H.Lév. & Vaniot (unaccepted)
Species Aster namaquanus Harv. (unaccepted)
Species Aster nanus E.Mey. ex DC. (unaccepted)
Species Aster nanus (Nutt.) Kuntze (unaccepted)
Species Aster nardophyllum Kuntze (unaccepted)
Species Aster natalensis (Sch.Bip.) Harv. (unaccepted)
Species Aster nebraskensis Britton (unaccepted)
Species Aster neesii Sch.Bip. (unaccepted)
Species Aster nemoralis Dryand. ex Aiton (unaccepted)
Species Aster neomexicanus Wooton & Standl. (unaccepted)
Species Aster neozelandicus Kuntze (unaccepted)
Species Aster nernstii F.Muell. (unaccepted)
Species Aster nevadensis (A.Gray) Kuntze (unaccepted)
Species Aster nevinii Kuntze (unaccepted)
Species Aster nitens Kuntze (unaccepted)
Species Aster nivalis Adam (unaccepted)
Species Aster noeanus Sch.Bip. ex Nyman (unaccepted)
Species Aster notosericeus Griseb. (unaccepted)
Species Aster novae-angliae L. (unaccepted)
Species Aster novi-belgii L. (unaccepted)
Species Aster nudicaulis Comm. ex Lam. (unaccepted)
Species Aster nudiflorus Nutt. (unaccepted)
Species Aster nummulariifolius (Hook.f.) Kuntze (unaccepted)
Species Aster nutatus (DC.) Kuntze (unaccepted)
Species Aster nuttallii (Torr. & A.Gray) Kuntze (unaccepted)
Species Aster nuttallii Torr. & A.Gray (unaccepted)
Species Aster obcordatus (Hook.f.) F.Muell. (unaccepted)
Species Aster obliquus Nees (unaccepted)
Species Aster obliquus DC. (unaccepted)
Species Aster oblongifolius Nutt. (unaccepted)
Species Aster obovatus (Nutt.) Elliott (unaccepted)
Species Aster obtusatus Thunb. (unaccepted)
Species Aster occidentalis (Nutt.) Torr. & A.Gray (unaccepted)
Species Aster ochagaviensis (Phil.) Kuntze (unaccepted)
Species Aster ochraceus Kunth (unaccepted)
Species Aster ochroleucus (Klatt) Kuntze (unaccepted)
Species Aster oculus-christi (L.) Cav. (unaccepted)
Species Aster odontophyllus Wall. (unaccepted)
Species Aster odorus (Aiton) Kuntze (unaccepted)
Species Aster officinalis All. (unaccepted)
Species Aster oharai Nakai (unaccepted)
Species Aster ohioensis (Riddell) Kuntze (unaccepted)
Species Aster ohtanus Makino (unaccepted)
Species Aster oldhamii Hemsl. (unaccepted)
Species Aster oleifolius (Lam.) Wagenitz (unaccepted)
Species Aster oleifolius (Kirk) Kuntze (unaccepted)
Species Aster oligocephalus (Schrenk) Kitam. (unaccepted)
Species Aster oligodontus Kuntze (unaccepted)
Species Aster omerophyllus Hayata (unaccepted)
Species Aster ontariensis Wiegand (unaccepted)
Species Aster ontarionis Wiegand (unaccepted)
Species Aster onustus Nees (unaccepted)
Species Aster oolentangiensis Riddell (unaccepted)
Species Aster operinus (Hook.f.) Kuntze (unaccepted)
Species Aster oppositifolius (A.Gray) Kuntze (unaccepted)
Species Aster oppositifolius (F.Muell.) F.Muell. (unaccepted)
Species Aster oppositifolius L. (unaccepted)
Species Aster orarius F.Muell. (unaccepted)
Species Aster orcuttii Vasey & Rose (unaccepted)
Species Aster oreaster (Onno) Farrer ex Onno (unaccepted)
Species Aster oregonensis (Nutt.) Cronquist (unaccepted)
Species Aster oregonum (Nutt.) Torr. & A.Gray (unaccepted)
Species Aster orientalis S.G.Gmel. (unaccepted)
Species Aster ornatus Hort.Angl. ex Steud. (unaccepted)
Species Aster osterhoutii Rydb. (unaccepted)
Species Aster otagoensis Kuntze (unaccepted)
Species Aster ottomanum Velen. (unaccepted)
Species Aster pallens Willd. (unaccepted)
Species Aster pallidulus B.Vogel (unaccepted)
Species Aster palmeri A.Gray (unaccepted)
Species Aster paludicola Piper (unaccepted)
Species Aster paludosus Sol. ex Aiton (unaccepted)
Species Aster palustris Lam. (unaccepted)
Species Aster paniculatus Dryand. ex Aiton (unaccepted)
Species Aster paniculatus Lam. (unaccepted)
Species Aster pannonicus Jacq. (unaccepted)
Species Aster pannosus (Hook.) F.Muell. (unaccepted)
Species Aster pansus (S.F.Blake) Cronquist (unaccepted)
Species Aster pantotrichus S.F.Blake (unaccepted)
Species Aster pappei Harv. (unaccepted)
Species Aster papposissimus H.Lév. (unaccepted)
Species Aster papposus Willd. ex Spreng. (unaccepted)
Species Aster parishii (Greene) Kuntze (unaccepted)
Species Aster parryi A.Gray (unaccepted)
Species Aster parviceps (E.S.Burgess) Mack. & Bush (unaccepted)
Species Aster parviflorus Nees (unaccepted)
Species Aster parviflorus (A.Gray) Hemsl. (unaccepted)
Species Aster parviflorus (A.Gray) A.Gray (unaccepted)
Species Aster parvifolius (DC.) Kuntze (unaccepted)
Species Aster parvulus S.F.Blake (unaccepted)
Species Aster patagonicus Cabrera (unaccepted)
Species Aster patagoniensis (Phil.) Kuntze (unaccepted)
Species Aster patens Dryand. ex Aiton (unaccepted)
Species Aster patentissimus Lindl. ex DC. (unaccepted)
Species Aster paternus Cronquist (unaccepted)
Species Aster pattersonii A.Gray (unaccepted)
Species Aster patulus Lam. (unaccepted)
Species Aster paucicapitatus (B.L.Rob.) B.L.Rob. (unaccepted)
Species Aster paucidentatus (Steetz) F.Muell. (unaccepted)
Species Aster pauciflorus Nutt. (unaccepted)
Species Aster pauciflorus M.Martens (unaccepted)
Species Aster pauciflosculosus (Michx.) Kuntze (unaccepted)
Species Aster pectinatus (Phil.) Kuntze (unaccepted)
Species Aster pedionomus Alexander (unaccepted)
Species Aster pedunculosus (J.Rémy) Kuntze (unaccepted)
Species Aster peirsonii Sharsm. (unaccepted)
Species Aster pekinensis (Hance) Merr. (unaccepted)
Species Aster pekinensis (Hance) Kitag. (unaccepted)
Species Aster pekinensis (Hance) Chen (unaccepted)
Species Aster pellitus Kunth (unaccepted)
Species Aster pensauensis Tamamsch. (unaccepted)
Species Aster pensilvanicus Poir. (unaccepted)
Species Aster peregrinus Less. (unaccepted)
Species Aster peregrinus Banks ex Pursh (unaccepted)
Species Aster perelegans A.Nelson & J.F.Macbr. (unaccepted)
Species Aster perezii Cuatrec. (unaccepted)
Species Aster perezioides (Nees) Less. (unaccepted)
Species Aster persoonioides (DC.) A.Cunn. ex DC. (unaccepted)
Species Aster peruvianus (Lam.) Cabrera (unaccepted)
Species Aster peteroanus Phil. (unaccepted)
Species Aster petiolaris (Aiton) Kuntze (unaccepted)
Species Aster petiolatus Harv. (unaccepted)
Species Aster petiolatus (Hook.f.) F.Muell. (unaccepted)
Species Aster philippii Kuntze (unaccepted)
Species Aster phlogifolius Muhl. ex Willd. (unaccepted)
Species Aster phlogopappus Labill. (unaccepted)
Species Aster phylicoides Kunth (unaccepted)
Species Aster phyllocephalus (DC.) Kuntze (unaccepted)
Species Aster phyllodes Rydb. (unaccepted)
Species Aster phyllolepis Torr. & A.Gray (unaccepted)
Species Aster piccolii Hook.f. (unaccepted)
Species Aster pichinchensis Willd. ex Nees (unaccepted)
Species Aster pickeringii Kuntze (unaccepted)
Species Aster pickettianus Suksd. (unaccepted)
Species Aster pilosus Willd. (unaccepted)
Species Aster pimeleoides A.Cunn. ex DC. (unaccepted)
Species Aster pineus (Phil.) Kuntze (unaccepted)
Species Aster pinifolius (Hook.f.) F.Muell. (unaccepted)
Species Aster pinifolius Alexander (unaccepted)
Species Aster pinifolius Nees (unaccepted)
Species Aster pinnatifidus Sessé & Moc. (unaccepted)
Species Aster pinnatifidus (Hook.) Kuntze (unaccepted)
Species Aster pinnatifidus Makino (unaccepted)
Species Aster pinnatus Cav. (unaccepted)
Species Aster pityphyllus Kuntze (unaccepted)
Species Aster plantagineus Poepp. ex DC. (unaccepted)
Species Aster plantaginifolius Nutt. ex Nees (unaccepted)
Species Aster platylepis (unaccepted)
Species Aster pleurophyllum F.Muell. (unaccepted)
Species Aster plumarius E.S.Burgess (unaccepted)
Species Aster plumosus Small (unaccepted)
Species Aster poaceus E.S.Burgess (unaccepted)
Species Aster polifolius L. (unaccepted)
Species Aster politus Nees (unaccepted)
Species Aster polycephalus Rydb. (unaccepted)
Species Aster polyglossa Kuntze (unaccepted)
Species Aster polyphyllus (Phil.) Kuntze (unaccepted)
Species Aster polyphyllus Pursh ex DC. (unaccepted)
Species Aster polyphyllus Moench (unaccepted)
Species Aster polyphyllus Willd. (unaccepted)
Species Aster poncinsii Franch. (unaccepted)
Species Aster populifolius (Colenso) Kuntze (unaccepted)
Species Aster porteri A.Gray (unaccepted)
Species Aster potosinus A.Gray (unaccepted)
Species Aster pradensis Phil. (unaccepted)
Species Aster praealtus Poir. (unaccepted)
Species Aster praecox Lindl. (unaccepted)
Species Aster praecox Mill. (unaccepted)
Species Aster praecox Willd. (unaccepted)
Species Aster praetermissus Drumm. ex Hand.-Mazz. (unaccepted)
Species Aster prascottii Lindl. ex DC. (unaccepted)
Species Aster pratensis Raf. (unaccepted)
Species Aster preissii F.Muell. (unaccepted)
Species Aster prenanthoides Muhl. ex Willd. (unaccepted)
Species Aster priceae Britton (unaccepted)
Species Aster pringlei (A.Gray) Britton (unaccepted)
Species Aster pristiphyllus (J.Rémy) Kuntze (unaccepted)
Species Aster procerus Hemsl. (unaccepted)
Species Aster procumbens Houst. ex Mill. (unaccepted)
Species Aster propinquus A.Cunn. ex DC. (unaccepted)
Species Aster prostratus Phil. (unaccepted)
Species Aster proteus E.S.Burgess (unaccepted)
Species Aster prunelloides (Poepp. ex Less.) Kuntze (unaccepted)
Species Aster psammophila (Malme) Herter (unaccepted)
Species Aster psammophilus (Malme) Klatt (unaccepted)
Species Aster psammophilus (Malme) Malag. (unaccepted)
Species Aster pseudamellus Hook.f. (unaccepted)
Species Aster pseudamellus Wender. (unaccepted)
Species Aster pseudoamellus DC. (unaccepted)
Species Aster pseudobarcincnensis Sennen (unaccepted)
Species Aster ptarmicoides (Nees) Torr. & A.Gray (unaccepted)
Species Aster pteronia Kuntze (unaccepted)
Species Aster pubens (M.A.Curtis ex Torr. & A.Gray) Kuntze (unaccepted)
Species Aster pubentior Cronquist (unaccepted)
Species Aster pubescens Moench (unaccepted)
Species Aster pubescens Hornem. (unaccepted)
Species Aster pubescens Lam. (unaccepted)
Species Aster pubescens Nees (unaccepted)
Species Aster pulchellus Hohen. (unaccepted)
Species Aster pulchellus Turcz. ex Herder (unaccepted)
Species Aster pulchellus Willd. (unaccepted)
Species Aster pulchellus D.C.Eaton (unaccepted)
Species Aster pulcherrimus Lodd. (unaccepted)
Species Aster pulverulentus Hoffmanns. (unaccepted)
Species Aster pulverulentus (Nutt.) Kuntze (unaccepted)
Species Aster pumilus Fisch. (unaccepted)
Species Aster pumilus Kuntze (unaccepted)
Species Aster punctatus Waldst. & Kit. (unaccepted)
Species Aster punctatus (Cass.) Parsa (unaccepted)
Species Aster puniceus L. (unaccepted)
Species Aster purdomii Hutch. (unaccepted)
Species Aster purpuratus Nees (unaccepted)
Species Aster purpureus Gueldenst. ex Ledeb. (unaccepted)
Species Aster purschianus Kuntze (unaccepted)
Species Aster pusillus (N.E.Br.) Hutch. (unaccepted)
Species Aster pygmaeus Lindl. (unaccepted)
Species Aster pyrenaicus Pourr. (unaccepted)
Species Aster pyrrhocoma Kuntze (unaccepted)
Species Aster pyrrhopappus Boiss. (unaccepted)
Species Aster quelpaertensis H.Lév. & Vaniot (unaccepted)
Species Aster quercifolius Sieber ex DC. (unaccepted)
Species Aster quercifolius Less. ex Walp. (unaccepted)
Species Aster quinquenervius Klatt (unaccepted)
Species Aster racemosus Elliott (unaccepted)
Species Aster radicans (J.Rémy) Kuntze (unaccepted)
Species Aster radula Sol. ex Aiton (unaccepted)
Species Aster radulinus A.Gray (unaccepted)
Species Aster rafinesquii Kuntze (unaccepted)
Species Aster ramosissimus Mill. (unaccepted)
Species Aster ramsbottomii Hand.-Mazz. (unaccepted)
Species Aster ramulosus Lindl. (unaccepted)
Species Aster ramulosus Nutt. (unaccepted)
Species Aster ramulosus Labill. (unaccepted)
Species Aster ramulosus Lindl. ex DC. (unaccepted)
Species Aster ranii Kuntze (unaccepted)
Species Aster recurvatus Günther ex Nees (unaccepted)
Species Aster recurvatus Pursh (unaccepted)
Species Aster recurvatus Willd. (unaccepted)
Species Aster recurvatus Spreng. (unaccepted)
Species Aster reevesii (A.Gray) Bergmans (unaccepted)
Species Aster reflexus L. (unaccepted)
Species Aster regalis Salisb. (unaccepted)
Species Aster regnellii Baker (unaccepted)
Species Aster remyanus (Wedd.) Kuntze (unaccepted)
Species Aster rengifoanus (J.Rémy) Kuntze (unaccepted)
Species Aster repens Kunth (unaccepted)
Species Aster reptans Sessé & Moc. (unaccepted)
Species Aster resinotus Kuntze (unaccepted)
Species Aster reticulatus Pursh (unaccepted)
Species Aster retinervius Kuntze (unaccepted)
Species Aster retortus (DC.) Harv. (unaccepted)
Species Aster retroflexus Lindl. ex DC. (unaccepted)
Species Aster reversii Hort. ex Decne. (unaccepted)
Species Aster reversus Kuntze (unaccepted)
Species Aster revolutus (Benth.) F.Muell. (unaccepted)
Species Aster rhomboideus Lindl. ex DC. (unaccepted)
Species Aster richardii (Vatke) Kuntze (unaccepted)
Species Aster richardsonii Spreng. (unaccepted)
Species Aster riciniatus E.S.Burgess (unaccepted)
Species Aster riddelii (Frank ex Frank) Kuntze (unaccepted)
Species Aster rigidulus Nees (unaccepted)
Species Aster rigidulus Desf. (unaccepted)
Species Aster rigidus (L.) Kuntze (unaccepted)
Species Aster rigidus Moench (unaccepted)
Species Aster rigidus (Cass.) Soó (unaccepted)
Species Aster rigidus L. (unaccepted)
Species Aster riparius Nees (unaccepted)
Species Aster riparius Kunth (unaccepted)
Species Aster rivularis Less. (unaccepted)
Species Aster robynsianus J.Rousseau (unaccepted)
Species Aster rolandii Shinners (unaccepted)
Species Aster roseus M.Bieb. ex Steven (unaccepted)
Species Aster roseus Desf. (unaccepted)
Species Aster rosmarinifolius A.Cunn. ex DC. (unaccepted)
Species Aster rosmarinifolius Spreng. (unaccepted)
Species Aster rosmarinifolius (DC.) F.Muell. (unaccepted)
Species Aster rothrockii Kuntze (unaccepted)
Species Aster rotundifolius Thunb. (unaccepted)
Species Aster roxburghii Hook.f. (unaccepted)
Species Aster roylei Onno (unaccepted)
Species Aster rubricaulis Lam. (unaccepted)
Species Aster rubrotinctus S.F.Blake (unaccepted)
Species Aster rufibarbis Harv. (unaccepted)
Species Aster rufopappus Hayata (unaccepted)
Species Aster rugosus (Mill.) Kuntze (unaccepted)
Species Aster rupestris E.H.L.Krause (unaccepted)
Species Aster rupestris (Raf.) Kuntze (unaccepted)
Species Aster rupestris Kunth (unaccepted)
Species Aster rupicola H.Lév. & Vaniot (unaccepted)
Species Aster rutaeodorus A.Cunn. ex DC. (unaccepted)
Species Aster saboureaui Humbert (unaccepted)
Species Aster sachalinensis Kudô (unaccepted)
Species Aster sagittifolius Elliott (unaccepted)
Species Aster sagittifolius Wedem. ex Willd. (unaccepted)
Species Aster salicifolius Aiton (unaccepted)
Species Aster salicifolius Richardson (unaccepted)
Species Aster salicifolius (unaccepted)
Species Aster salicinus (L.) Scop. (unaccepted)
Species Aster salicinus Nees (unaccepted)
Species Aster salignus Schrad. (unaccepted)
Species Aster salignus Willd. (unaccepted)
Species Aster salsuginosus Richardson (unaccepted)
Species Aster salsuginosus Less. (unaccepted)
Species Aster salsuginosus Hook. (unaccepted)
Species Aster sandwicensis (A.Gray) Hieron. (unaccepted)
Species Aster sanguineus Willd. ex Spreng. (unaccepted)
Species Aster satureiaefolius Banks (unaccepted)
Species Aster savatieri Makino (unaccepted)
Species Aster savianus Kuntze (unaccepted)
Species Aster savii Arcang. (unaccepted)
Species Aster saxatilis (J.Rémy) Kuntze (unaccepted)
Species Aster saxatilis (Fernald) Blanch. (unaccepted)
Species Aster saxicastelli J.J.N.Campb. & Medley (unaccepted)
Species Aster sayianus Nutt. (unaccepted)
Species Aster scaber Elliott (unaccepted)
Species Aster scaber Thunb. (unaccepted)
Species Aster scaberrimus Less. (unaccepted)
Species Aster scaberulus Miq. (unaccepted)
Species Aster scabricaulis Shinners (unaccepted)
Species Aster scabridus (DC.) E.Mey. ex C.B.Clarke (unaccepted)
Species Aster scabris Mill. (unaccepted)
Species Aster scabrosus Bertol. (unaccepted)
Species Aster scandens J.Jacq. ex Spreng. (unaccepted)
Species Aster scaposus (Baker) Kuntze (unaccepted)
Species Aster scaposus Klatt (unaccepted)
Species Aster scepusiensis Kit. (unaccepted)
Species Aster scepusiensis Kit. ex Kanitz (unaccepted)
Species Aster schaeferi Dinter (unaccepted)
Species Aster schaffneri Sch.Bip. ex S.D.Sundb. & A.G.Jones (unaccepted)
Species Aster schistosus E.S.Steele (unaccepted)
Species Aster schlechteri Compton (unaccepted)
Species Aster schreberi Nees (unaccepted)
Species Aster schumannii Kuntze (unaccepted)
Species Aster scoparius DC. (unaccepted)
Species Aster scoparius (Kar. & Kir.) Kuntze (unaccepted)
Species Aster scoparius Nees (unaccepted)
Species Aster scopiformis Kuntze (unaccepted)
Species Aster scopulorum A.Gray (unaccepted)
Species Aster scorpioides (L.) Scop. (unaccepted)
Species Aster scrobiculatus (Nees) Kuntze (unaccepted)
Section Aster sect. Asteromoea (Blume) Makino (unaccepted)
Section Aster sect. Caroliniani Small (unaccepted)
Section Aster sect. Conyzopsis Torr. & A.Gray (unaccepted)
Section Aster sect. Doellingeria (Nees) Kitam. (unaccepted)
Section Aster sect. Eucephalus (Nutt.) Munz & D.D.Keck ex A.G.Jones (unaccepted)
Section Aster sect. Grandiflori Torr. & A.Gray (unaccepted)
Section Aster sect. Hesterastrum Benth. (unaccepted)
Section Aster sect. Heterastrum Benth. & Hook.f. (unaccepted)
Section Aster sect. Kalimeris (Cass.) Nees ex O.Hoffm. (unaccepted)
Section Aster sect. Nemorali House (unaccepted)
Section Aster sect. Noticastrum Benth. & Hook.f. (unaccepted)
Section Aster sect. Occidentales (Rydb.) A.G.Jones (unaccepted)
Section Aster sect. Oritrophium Kunth (unaccepted)
Section Aster sect. Orthomeris (Torr. & A.Gray) Benth. & Hook.f. (unaccepted)
Section Aster sect. Oxytripolium (DC.) Torr. & A.Gray (unaccepted)
Section Aster sect. Pauciflori (Rydb.) A.G.Jones (unaccepted)
Section Aster sect. Ptarmicoidei House (unaccepted)
Section Aster sect. Sagittiferi (A.Gray) A.G.Jones (unaccepted)
Section Aster sect. Sagittiferi A.Gray (unaccepted)
Section Aster sect. Salicifolii Torr. & A.Gray (unaccepted)
Section Aster sect. Sericocarpus (Nees) Semple (unaccepted)
Section Aster sect. Serratifolii Loudon (unaccepted)
Section Aster sect. Spinosi (Alexander) A.G.Jones (unaccepted)
Section Aster sect. Triplopappus (Torr. & A.Gray) A.G.Jones (unaccepted)
Species Aster secundiflorus Desf. (unaccepted)
Species Aster secundirameus Zeyh. ex Sch.Bip. (unaccepted)
Species Aster sedifolius L. (unaccepted)
Species Aster see-burejensis Tamamsch. (unaccepted)
Species Aster sejaensis Kuntze (unaccepted)
Species Aster seliger Nees (unaccepted)
Species Aster semidentatus (Decne.) F.Muell. (unaccepted)
Species Aster sempervirens (L.) Kuntze (unaccepted)
Species Aster senebierifolius Kuntze (unaccepted)
Species Aster serenoi Kuntze (unaccepted)
Species Aster sericeus Vent. (unaccepted)
Species Aster sericeus (Less.) Nees (unaccepted)
Species Aster sericocarpoides (Small) K.Schum. (unaccepted)
Species Aster serotinus Willd. (unaccepted)
Species Aster serpentimontanus Tamamsch. (unaccepted)
Species Aster serratifolius Schloss. & Vuk. (unaccepted)
Species Aster serratus Thunb. (unaccepted)
Species Aster serratus Lag. ex DC. (unaccepted)
Species Aster serrulatus (Greene) Frye & Rigg (unaccepted)
Species Aster serrulatus Harv. (unaccepted)
Species Aster sessiliflorus (Hook.f.) F.Muell. (unaccepted)
Species Aster setiger (Phil.) Kuntze (unaccepted)
Species Aster setosus Baker (unaccepted)
Species Aster shastensis (A.Gray) A.Gray (unaccepted)
Species Aster sherriffianus Hand.-Mazz. (unaccepted)
Species Aster shimadai (Kitam.) Nemoto (unaccepted)
Species Aster shortii Lindl. (unaccepted)
Species Aster sibiricus L. (unaccepted)
Species Aster siemssenii F.Muell. (unaccepted)
Species Aster silenifolius Turcz. ex DC. (unaccepted)
Species Aster simmondsii Small (unaccepted)
Species Aster simplex Willd. (unaccepted)
Species Aster simplex (unaccepted)
Species Aster simplex C.C.Chang (unaccepted)
Species Aster simulans Harv. (unaccepted)
Species Aster simulatus Small (unaccepted)
Species Aster sinuatus A.Cunn. ex DC. (unaccepted)
Species Aster siskiyouensis A.Nelson & J.F.Macbr. (unaccepted)
Species Aster smithianus Hand.-Mazz. (unaccepted)
Species Aster sodiroi Hieron. (unaccepted)
Species Aster sodiroi Hieron. ex Sodiro (unaccepted)
Species Aster solandri (Hook.f.) F.Muell. (unaccepted)
Species Aster solidagineus Michx. ex Willd. (unaccepted)
Species Aster solidagineus Michx. (unaccepted)
Species Aster solidaginoides Pers. (unaccepted)
Species Aster sonderi F.Muell. (unaccepted)
Species Aster sonorae A.Gray (unaccepted)
Species Aster sonoriensis (A.Gray) Kuntze (unaccepted)
Species Aster sorrentini (Tod.) Lojac. (unaccepted)
Species Aster sparsiflorus Michx. (unaccepted)
Species Aster sparsiflorus (A.Gray) Kuntze (unaccepted)
Species Aster sparsiflorus Pursh (unaccepted)
Species Aster spartioides C.B.Clarke (unaccepted)
Species Aster spatelliformis E.S.Burgess (unaccepted)
Species Aster spathularis Steud. (unaccepted)
Species Aster spathularis Lag. ex Nees (unaccepted)
Species Aster spathularis Brouss. ex DC. (unaccepted)
Species Aster spathulatus Lindl. (unaccepted)
Species Aster speciosus (Nutt.) Kuntze (unaccepted)
Species Aster speciosus Hornem. (unaccepted)
Species Aster spectabilis Sol. ex Aiton (unaccepted)
Species Aster spectabilis Willd. (unaccepted)
Species Aster spectatissimus F.Muell. (unaccepted)
Species Aster sphaerotus Y.Ling (unaccepted)
Species Aster spinosus Benth. (unaccepted)
Species Aster spinuliger (A.Gray) Kuntze (unaccepted)
Species Aster spinulosus Chapm. (unaccepted)
Species Aster spithamaeus (M.A.Curtis ex A.Gray) Kuntze (unaccepted)
Species Aster spurius Willd. (unaccepted)
Species Aster squarrosulus Nees (unaccepted)
Species Aster squarrosus Walter (unaccepted)
Species Aster squarrosus Sessé & Moc. (unaccepted)
Species Aster squarrosus All. (unaccepted)
Species Aster staehelinoides (DC.) Kuntze (unaccepted)
Species Aster standleyi Davidson (unaccepted)
Species Aster staticifolius Franch. (unaccepted)
Species Aster steeleorum Shinners (unaccepted)
Species Aster steetzii F.Muell. (unaccepted)
Species Aster stelliger (J.Rémy) Kuntze (unaccepted)
Species Aster stellulatus Labill. (unaccepted)
Species Aster stenactis E.H.L.Krause (unaccepted)
Species Aster stenomeres A.Gray (unaccepted)
Species Aster stenophyllus (A.Gray) Kuntze (unaccepted)
Species Aster stenophyllus Lindl. ex DC. (unaccepted)
Species Aster stenotus Kuntze (unaccepted)
Species Aster sternbergii Kuntze (unaccepted)
Species Aster stewardensis Kuntze (unaccepted)
Species Aster stilettiformis E.S.Burgess (unaccepted)
Species Aster stolonifer (DC.) Kuntze (unaccepted)
Species Aster stricticaulis (Torr. & A.Gray) Rydb. (unaccepted)
Species Aster strictus (Aiton) Kuntze (unaccepted)
Species Aster strictus Poir. (unaccepted)
Species Aster strictus Wender. (unaccepted)
Species Aster strigosus (A.Spreng.) Licht. ex Harv. (unaccepted)
Species Aster strigosus Thunb. (unaccepted)
Species Aster stuartii (F.Muell.) F.Muell. (unaccepted)
Species Aster stuebelii Hieron. (unaccepted)
Species Aster subasper Lindl. (unaccepted)
Species Aster subcoerulea S.Moore (unaccepted)
Species Aster subcymosus Bernh. ex Nees (unaccepted)
Subgenus Aster subg. Ascendentes (Rydb.) Semple (unaccepted)
Subgenus Aster subg. Canadanthus (G.L.Nesom) Semple (unaccepted)
Subgenus Aster subg. Conyzopsis (Torr. & A.Gray) A.Gray (unaccepted)
Subgenus Aster subg. Doellingeria (Nees) A.Gray (unaccepted)
Subgenus Aster subg. Eurybia Cass. (unaccepted)
Subgenus Aster subg. Hesperastrum (A.Gray) A.Gray (unaccepted)
Subgenus Aster subg. Ianthe (Torr. & A.Gray) A.Gray (unaccepted)
Subgenus Aster subg. Kalimeris (Cass.) H.S.Pak (unaccepted)
Subgenus Aster subg. Kalimeris Cass. (unaccepted)
Subgenus Aster subg. Orthomeris (Torr. & A.Gray) A.Gray (unaccepted)
Subgenus Aster subg. Oxytripolium (DC.) A.Gray (unaccepted)
Subgenus Aster subg. Oxytripolium (DC.) Torr. & A.Gray (unaccepted)
Subgenus Aster subg. Sericocarpus (Nees) A.G.Jones (unaccepted)
Subgenus Aster subg. Solidago (L.) Kuntze (unaccepted)
Subgenus Aster subg. Symphyotrichum (Nees) A.G.Jones (unaccepted)
Subgenus Aster subg. Virgulus (Raf.) A.G.Jones (unaccepted)
Species Aster subgeminatus (Fernald) B.Boivin (unaccepted)
Species Aster subgriseus Rydb. (unaccepted)
Species Aster subintegerrimus (Trautv.) Ostenf. & Resvoll (unaccepted)
Species Aster sublitoralis (Torr. & A.Gray) Kuntze (unaccepted)
Species Aster suborbiculatus (Colenso) Kuntze (unaccepted)
Subsection Aster subsect. Chapmaniani Semple (unaccepted)
Subsection Aster subsect. Eucephalus (Nutt.) Benth. (unaccepted)
Subsection Aster subsect. Occidentales (Rydb.) A.G.Jones (unaccepted)
Subsection Aster subsect. Salicifolii (Torr. & A.Gray) A.G.Jones (unaccepted)
Species Aster subsessilis E.S.Burgess (unaccepted)
Species Aster subspathulatus Rydb. (unaccepted)
Species Aster subspicatus Nees (unaccepted)
Species Aster subtropicus Morong (unaccepted)
Species Aster succulentus Gilib. (unaccepted)
Species Aster suffruticosus (Nutt.) Kuntze (unaccepted)
Species Aster sulznerae Small (unaccepted)
Species Aster suputinicus Tamamsch. (unaccepted)
Species Aster surculosus Michx. (unaccepted)
Species Aster sutschanensis Kom. (unaccepted)
Species Aster sylvestris E.S.Burgess (unaccepted)
Species Aster tagetinus (Greene) S.F.Blake (unaccepted)
Species Aster tanacetifolius Kunth (unaccepted)
Species Aster tarbagatensis (K.Koch) Merxm. (unaccepted)
Species Aster tardiflorus L. (unaccepted)
Species Aster tataricus Turcz. (unaccepted)
Species Aster taxifolius L. (unaccepted)
Species Aster tenebrosus E.S.Burgess (unaccepted)
Species Aster tenellus L. (unaccepted)
Species Aster tener (DC.) Harv. (unaccepted)
Species Aster tenerrimus Less. (unaccepted)
Species Aster tenuicaulis (C.Mohr) E.S.Burgess (unaccepted)
Species Aster tenuifolius L. (unaccepted)
Species Aster tenuipes (Wiegand) Shinners (unaccepted)
Species Aster tephrodes (A.Gray) S.F.Blake (unaccepted)
Species Aster teretifolius (Sond.) F.Muell. (unaccepted)
Species Aster terrae-novae (Torr. & A.Gray) Kuntze (unaccepted)
Species Aster texanus E.S.Burgess (unaccepted)
Species Aster thyrsiflorus Hoffm. (unaccepted)
Species Aster thyrsodeus (E.Mey.) Kuntze (unaccepted)
Species Aster tibeticus Hook.f. (unaccepted)
Species Aster tilesii Wichstr. (unaccepted)
Species Aster tinctorius Wallr. (unaccepted)
Species Aster tolmatschevii Tamamsch. (unaccepted)
Species Aster tolmieanus (A.Gray) Kuntze (unaccepted)
Species Aster tomentellus Hook. & Arn. (unaccepted)
Species Aster tomentellus (Greene) Frye & Rigg (unaccepted)
Species Aster tomentosus Schrad. ex J.C.Wendl. (unaccepted)
Species Aster torreyi Kuntze (unaccepted)
Species Aster tortifolius Michx. (unaccepted)
Species Aster tortifolius (Torr. & A.Gray) A.Gray (unaccepted)
Species Aster townshendii Hook.f. (unaccepted)
Species Aster trachytectus Phil. (unaccepted)
Species Aster trachyticus Phil. (unaccepted)
Species Aster tradescantii L. (unaccepted)
Species Aster traillii (Kirk) Kuntze (unaccepted)
Species Aster transiens F.Muell. (unaccepted)
Species Aster traversii (F.Muell.) F.Muell. (unaccepted)
Species Aster triangularis (E.S.Burgess) E.S.Burgess (unaccepted)
Species Aster trianthus Vell. (unaccepted)
Species Aster trichanthus Hand.-Mazz. (unaccepted)
Species Aster trichocarpus (DC.) Druce (unaccepted)
Species Aster tricolor Spreng. (unaccepted)
Species Aster tricolor (Nees) Harv. (unaccepted)
Species Aster trifurcatus Banks & Sol. ex Hook.f. (unaccepted)
Species Aster trilineatus Sch.Bip. ex Klatt (unaccepted)
Species Aster trinervifolius Less. (unaccepted)
Species Aster trinervis (Pers.) Nees (unaccepted)
Species Aster trinervis Ruiz & Pav. ex D.Don (unaccepted)
Species Aster trinervis Ruiz & Pav. ex DC. (unaccepted)
Species Aster trinervius Gilib. (unaccepted)
Species Aster tripolium L. (unaccepted)
Species Aster truellius E.S.Burgess (unaccepted)
Species Aster tsuneoi (Tatew.) Miyabe & Tatew. (unaccepted)
Species Aster tuberosus Less. ex Baker (unaccepted)
Species Aster tubuliflorus (Sond. & F.Muell. ex Sond.) F.Muell. (unaccepted)
Species Aster tubulosus (Kitam.) Kitam. (unaccepted)
Species Aster tuganianus Albov (unaccepted)
Species Aster turbinellus Lindl. (unaccepted)
Species Aster turczaninowii F.Muell. (unaccepted)
Species Aster tweediei (Hook. & Arn.) Herter (unaccepted)
Species Aster tweedyi Rydb. (unaccepted)
Species Aster uliginosus J.M.Wood & M.S.Evans (unaccepted)
Species Aster uliginosus (Nutt.) Kuntze (unaccepted)
Species Aster ulmifolius (Muhl. ex Willd.) Kuntze (unaccepted)
Species Aster umbellatus Mill. (unaccepted)
Species Aster umbrosus (Benth.) Govaerts (unaccepted)
Species Aster unalaschkensis Less. (unaccepted)
Species Aster unalaschkensis Less. ex Bong. (unaccepted)
Species Aster uncinatus (Phil.) Kuntze (unaccepted)
Species Aster undulatus L. (unaccepted)
Species Aster uniflorus (Bunge ex DC.) B.Fedtsch. (unaccepted)
Species Aster uniflorus Michx. (unaccepted)
Species Aster uniflorus (Hook.) Kuntze (unaccepted)
Species Aster uniligulatus (DC.) Kuntze (unaccepted)
Species Aster urophyllus Lindl. ex DC. (unaccepted)
Species Aster ursinus H.Lév. (unaccepted)
Species Aster ursinus Lév. & Vaniot (unaccepted)
Species Aster vahlii (Gaudich.) Hook. & Arn. (unaccepted)
Species Aster vaillantii All. (unaccepted)
Species Aster vallicola Greene (unaccepted)
Species Aster valparaisanus Kuntze (unaccepted)
Species Aster vaniotii H.Lév. (unaccepted)
Species Aster variabilis Sessé & Moc. (unaccepted)
Species Aster vaseyi (A.Gray) Kuntze (unaccepted)
Species Aster vaurealis J.Rousseau (unaccepted)
Species Aster vellereus Franch. (unaccepted)
Species Aster velutinus (DC.) Kuntze (unaccepted)
Species Aster venetus Kuntze (unaccepted)
Species Aster venosus Kuntze (unaccepted)
Species Aster venustus Fourc. (unaccepted)
Species Aster venustus M.E.Jones (unaccepted)
Species Aster vernalis Engelm. ex E.S.Burgess (unaccepted)
Species Aster vernicifluus F.Muell. (unaccepted)
Species Aster vernicosus (Hook.f.) F.Muell. (unaccepted)
Species Aster vernus L. (unaccepted)
Species Aster vernus (M.A.Curtis ex Torr. & A.Gray) Kuntze (unaccepted)
Species Aster versicolor Willd. (unaccepted)
Species Aster verutifolius Alexander (unaccepted)
Species Aster vialis (Bradshaw) S.F.Blake (unaccepted)
Species Aster villarsii E.H.L.Krause (unaccepted)
Species Aster villiger Kuntze (unaccepted)
Species Aster villosus Thunb. (unaccepted)
Species Aster villosus (L.) Sch.Bip. (unaccepted)
Species Aster villosus (L.) J.Wagner (unaccepted)
Species Aster villosus Michx. (unaccepted)
Species Aster vilmorinii Franch. (unaccepted)
Species Aster vimineus Lam. (unaccepted)
Species Aster virgatus Elliott (unaccepted)
Species Aster virgatus Nees (unaccepted)
Species Aster virgatus Moench (unaccepted)
Species Aster virgineus Nees (unaccepted)
Species Aster viscidiflorus Kuntze (unaccepted)
Species Aster viscifluus F.Muell. (unaccepted)
Species Aster viscosus Labill. (unaccepted)
Species Aster walteri Alexander (unaccepted)
Species Aster wardii (A.Gray) Kuntze (unaccepted)
Species Aster warmingii Baker (unaccepted)
Species Aster wasatchensis (M.E.Jones) S.F.Blake (unaccepted)
Species Aster watsonii A.Gray (unaccepted)
Species Aster wattii C.B.Clarke (unaccepted)
Species Aster welshii Cronquist (unaccepted)
Species Aster westae Fourc. (unaccepted)
Species Aster whitneyi (A.Gray) Kuntze (unaccepted)
Species Aster wilsonii Rydb. (unaccepted)
Species Aster wolfii Favrat (unaccepted)
Species Aster woodhousei Wooton (unaccepted)
Species Aster woodii Klatt (unaccepted)
Species Aster wootonii (Greene) Greene (unaccepted)
Species Aster worcesterensis Kuntze (unaccepted)
Species Aster wrightii A.Gray (unaccepted)
Species Aster xerophilus (F.Muell.) F.Muell. (unaccepted)
Species Aster xylophyllus Klatt (unaccepted)
Species Aster xylorhiza (Nutt.) Torr. & A.Gray (unaccepted)
Species Aster yamatsutanus Kitag. (unaccepted)
Species Aster yamazutae Matsuda (unaccepted)
Species Aster yangtzensis Migo (unaccepted)
Species Aster yokusaianus Kitam. ex H.Hara (unaccepted)
Species Aster yokusaianus Kitam. (unaccepted)
Species Aster yosemitanus (A.Gray) Greene (unaccepted)
Species Aster yukonensis Cronquist (unaccepted)
Species Aster zayuensis Y.L.Chen (unaccepted)
Species Aster zeyheri Less. (unaccepted)
Species Aster zosterifolius Reiche (unaccepted)

Species Aster ×gravesii E.S.Burgess ex Britton (uncertain > unassessed)
Species Aster acris Lapeyr. (uncertain > unassessed)
Species Aster acris Willd. (uncertain > unassessed)
Species Aster acris Leyss. (uncertain > unassessed)
Species Aster acuminatus Nees (uncertain > unassessed)
Species Aster acutidens Smyth (uncertain > unassessed)
Species Aster adelberti Kuntze (uncertain > unassessed)
Species Aster adscendens Lindl. ex DC. (uncertain > unassessed)
Species Aster adscendens Lindl. (uncertain > unassessed)
Species Aster adsurgens Greene (uncertain > unassessed)
Species Aster aestivus Dryand. (uncertain > unassessed)
Species Aster aitonii J.Forbes (uncertain > unassessed)
Species Aster alberti Phil. (uncertain > unassessed)
Species Aster albus Eaton & J.Wright (uncertain > unassessed)
Species Aster alleghaniensis E.S.Burgess (uncertain > unassessed)
Species Aster alpinus Gueldenst. ex Ledeb. (uncertain > unassessed)
Species Aster altissimus Mill. (uncertain > unassessed)
Species Aster alwartensis Lodd. (uncertain > unassessed)
Species Aster amabilis Wender. ex Nees (uncertain > unassessed)
Species Aster amabilis Wender. (uncertain > unassessed)
Species Aster ambiguus Bernh. ex E.S.Burgess (uncertain > unassessed)
Species Aster ambiguus Bernh. (uncertain > unassessed)
Species Aster ambiouus berrnh ex Burgess (uncertain > unassessed)
Species Aster americana Houston (uncertain > unassessed)
Species Aster amethystina Nutt. (uncertain > unassessed)
Species Aster amnicola E.S.Burgess (uncertain > unassessed)
Species Aster amplexicaulis Muhl. ex Willd. (uncertain > unassessed)
Species Aster amplexicaulis Muhl. ex Lam. (uncertain > unassessed)
Species Aster ampliatus E.S.Burgess (uncertain > unassessed)
Species Aster amplissimus Greene (uncertain > unassessed)
Species Aster amplus Lindl. ex DC. (uncertain > unassessed)
Species Aster amplus Lindl. (uncertain > unassessed)
Species Aster andersonii E.Forst. ex J.Forbes (uncertain > unassessed)
Species Aster andinus Nutt. (uncertain > unassessed)
Species Aster andrewsii A.Nelson (uncertain > unassessed)
Species Aster angustifolia (uncertain > unassessed)
Species Aster anomalus Engelm. (uncertain > unassessed)
Species Aster ansif Mart. (uncertain > unassessed)
Species Aster apargiodes Kuntze (uncertain > unassessed)
Species Aster arcifolius E.S.Burgess (uncertain > unassessed)
Species Aster arcticus Eastw. (uncertain > unassessed)
Species Aster arcuatus E.S.Burgess (uncertain > unassessed)
Species Aster ardens E.S.Burgess (uncertain > unassessed)
Species Aster ardense J.Forbes (uncertain > unassessed)
Species Aster arenarioides D.C.Eaton (uncertain > unassessed)
Species Aster arenicola E.S.Burgess (uncertain > unassessed)
Species Aster argillarius E.S.Burgess (uncertain > unassessed)
Species Aster argillicola Peck (uncertain > unassessed)
Species Aster argillicola M.Peck (uncertain > unassessed)
Species Aster arguta Kuntze (uncertain > unassessed)
Species Aster armoricanus Rouy (uncertain > unassessed)
Species Aster arragonensis Auct. (uncertain > unassessed)
Species Aster asper Nees (uncertain > unassessed)
Species Aster asper Buch.-Ham. ex DC. (uncertain > unassessed)
Species Aster asperrimus Less. (uncertain > unassessed)
Species Aster asperrimus Wall. (uncertain > unassessed)
Species Aster asperulus Wall. (uncertain > unassessed)
Species Aster asperulus Nees (uncertain > unassessed)
Species Aster atrovirens E.S.Burgess (uncertain > unassessed)
Species Aster aucuparius E.S.Burgess (uncertain > unassessed)
Species Aster auritus Lindl. (uncertain > unassessed)
Species Aster avicenniifolia (Hook.f.) F.Muell. (uncertain > unassessed)
Species Aster axillaris (DC.) F.Muell. (uncertain > unassessed)
Species Aster bakerensis H.St.John (uncertain > unassessed)
Species Aster barrelieri Pau (uncertain > unassessed)
Species Aster batesii Rydb. (uncertain > unassessed)
Species Aster behringensis Gand. (uncertain > unassessed)
Species Aster bellidiastrum Nees ex Walp. (uncertain > unassessed)
Species Aster bellidioides Baker (uncertain > unassessed)
Species Aster bellis Krause (uncertain > unassessed)
Species Aster bellus S.F.Blake (uncertain > unassessed)
Species Aster benthamii F.Muell. (uncertain > unassessed)
Species Aster beterochaeta Benth. (uncertain > unassessed)
Species Aster biennis (Lindl. ex DC.) Ledeb. ex Franch. (uncertain > unassessed)
Species Aster bifoliatus (Walter) Ahles (uncertain > unassessed)
Species Aster biformis (E.S.Burgess) E.S.Burgess (uncertain > unassessed)
Species Aster bifrons Lindl. (uncertain > unassessed)
Species Aster blanchetii (Baker) Hieron. (uncertain > unassessed)
Species Aster blinii H.Lév. (uncertain > unassessed)
Species Aster bodinieri H.Lév. (uncertain > unassessed)
Species Aster boergeri Herter (uncertain > unassessed)
Species Aster borreri J.Forbes (uncertain > unassessed)
Species Aster bowerii Hemsl. (uncertain > unassessed)
Species Aster brachyphyllus Chang (uncertain > unassessed)
Species Aster brevibracteatus Rydb. (uncertain > unassessed)
Species Aster brevicaulis W.P.Li (uncertain > unassessed)
Species Aster bulleyanus Jeffrey (uncertain > unassessed)
Species Aster bupleuroides J.Forbes (uncertain > unassessed)
Species Aster caespitosus E.Forst. ex J.Forbes (uncertain > unassessed)
Species Aster calcareus (F.Muell. ex Benth.) F.Muell. (uncertain > unassessed)
Species Aster calendulifolius Loisel. (uncertain > unassessed)
Species Aster calocephalus Malme (uncertain > unassessed)
Species Aster camptilis E.S.Burgess (uncertain > unassessed)
Species Aster canadensis (L.) Krause (uncertain > unassessed)
Species Aster canadensis Kuntze (uncertain > unassessed)
Species Aster candelabrum Vaniot (uncertain > unassessed)
Species Aster canus Waldst., Kit. & Bujor.apud Borza (uncertain > unassessed)
Species Aster capillaris E.S.Burgess (uncertain > unassessed)
Species Aster capusi Franch. (uncertain > unassessed)
Species Aster carmesinus E.S.Burgess ex Britton & A.Brown (uncertain > unassessed)
Species Aster carnosus A.Gray (uncertain > unassessed)
Species Aster carterianus J.K.Henry (uncertain > unassessed)
Species Aster cassiarabicus Maund. (uncertain > unassessed)
Species Aster cavaleriei Vaniot & H.Lév. (uncertain > unassessed)
Species Aster celtibericus Pau (uncertain > unassessed)
Species Aster ceruminensis (A.Gray) Kuntze (uncertain > unassessed)
Species Aster ceruminensis (Durand & Hilg.) Kuntze (uncertain > unassessed)
Species Aster chamissonis Torr. (uncertain > unassessed)
Species Aster chaneti H.Lév. & Vaniot (uncertain > unassessed)
Species Aster chanetii H.Lév. & Vaniot (uncertain > unassessed)
Species Aster chasei G.N.Jones (uncertain > unassessed)
Species Aster chelonicus Lunell (uncertain > unassessed)
Species Aster choralis E.S.Steele (uncertain > unassessed)
Species Aster chusanensis Y.S.Lim, Hyun, Y.D.Kim & H.C.Shin (uncertain > unassessed)
Species Aster ciliomarginatus Rydb. (uncertain > unassessed)
Species Aster circularis E.S.Burgess (uncertain > unassessed)
Species Aster claytonii E.S.Burgess ex Britton & A.Brown (uncertain > unassessed)
Species Aster clivorum Lunell (uncertain > unassessed)
Species Aster colchicus Albov ex Grossh. (uncertain > unassessed)
Species Aster colensoi Kuntze (uncertain > unassessed)
Species Aster confusus Harv. ex Harv. & Sond. (uncertain > unassessed)
Species Aster conspicuus Less. (uncertain > unassessed)
Species Aster conyza (uncertain > unassessed)