Compositae taxon details

Asterinae (Cass.) Dumort.

1075061  (urn:lsid:marinespecies.org:taxname:1075061)

accepted
Subtribe
Genus Arctogeron DC.
Genus Aster L.
  » Species Aster acer Roehl.
    » Variety Aster acer var. acer accepted as Aster acer Roehl.
    » Variety Aster acer var. trinervis (uncertain > unassessed)
  » Species Aster acris S.G.Gmel.
  » Species Aster ageratoides Turcz.
    » Forma Aster ageratoides f. ageratoides
    » Subspecies Aster ageratoides subsp. ageratoides
    » Subspecies Aster ageratoides subsp. alatopetiolata Kitam.
    » Subspecies Aster ageratoides subsp. alatopetiolatus Kitam.
    » Variety Aster ageratoides var. ageratoides
    » Variety Aster ageratoides var. alatopetiolatus (Kitam.) Kitam.
    » Variety Aster ageratoides var. firmus (Diels) Hand.-Mazz.
    » Variety Aster ageratoides var. grossedentatus (Franch. ex Diels) Kitam.
    » Variety Aster ageratoides var. intermedius (Soejima) Mot.Ito & Soejima
    » Variety Aster ageratoides var. laticorymbus (Vaniot) Hand.-Mazz.
    » Variety Aster ageratoides var. ovalifolius Kitam.
      » Forma Aster ageratoides var. ovalifolius f. leucanthus Honda accepted as Aster ageratoides Turcz.
      » Forma Aster ageratoides var. ovalifolius f. littoricola (Kitam.) Ohwi accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
      » Forma Aster ageratoides var. ovalifolius f. ovalifolius (Kitam.) Ohwi accepted as Aster ageratoides var. ovalifolius Kitam.
      » Forma Aster ageratoides var. ovalifolius f. sawadanus (Kitam.) Ohwi accepted as Aster ageratoides var. sawadanus Kitam.
      » Forma Aster ageratoides var. ovalifolius f. stenophyllus (Kitam.) Ohwi accepted as Aster ageratoides Turcz.
      » Forma Aster ageratoides var. ovalifolius f. tenuifolius (Kitam.) Ohwi accepted as Aster ageratoides var. tenuifolius Kitam.
      » Forma Aster ageratoides var. ovalifolius f. vernalis (Honda) Ohwi accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
    » Variety Aster ageratoides var. potaninii (Diels) Kitam.
    » Variety Aster ageratoides var. sawadanus Kitam.
    » Variety Aster ageratoides var. spirifolius H.S.Pak
    » Variety Aster ageratoides var. tenuifolius Kitam.
    » Forma Aster ageratoides f. adustus (Maxim.) Zdor. accepted as Aster ageratoides Turcz.
    » Forma Aster ageratoides f. albiflorus Kitam. accepted as Aster ageratoides Turcz.
    » Forma Aster ageratoides f. humilis (Nakai) Ohwi accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
    » Forma Aster ageratoides f. luxurifolius (Tamamsch.) Zdor. accepted as Aster ageratoides Turcz.
    » Forma Aster ageratoides f. suputinicus (Tamamsch.) Zdor. accepted as Aster ageratoides Turcz.
    » Forma Aster ageratoides f. sutschanensis (Kom.) Zdor. accepted as Aster ageratoides Turcz.
    » Forma Aster ageratoides f. yezoensis (Kitam. & Hara) Ohwi accepted as Aster ovatus var. yezoensis (Kitam. & Hara) Mot.Ito & Soejima
    » Subspecies Aster ageratoides subsp. amplexifolius Kitam. accepted as Aster satsumensis Soejima
    » Subspecies Aster ageratoides subsp. angustifolius (Kitam.) Kitam. accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
    » Subspecies Aster ageratoides subsp. leiophyllus (Franch. & Sav.) Kitam. accepted as Aster ageratoides Turcz.
    » Subspecies Aster ageratoides subsp. megalocephalus Kitam. accepted as Aster ageratoides Turcz.
    » Subspecies Aster ageratoides subsp. ovatus (Franch. & Sav.) Kitam. accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
    » Subspecies Aster ageratoides subsp. ripensis (Makino) Kitam. accepted as Aster ovatus var. ripensis (Makino) Mot.Ito & Soejima
    » Subspecies Aster ageratoides subsp. trinervius (Roxb. ex D.Don) Kitam. accepted as Aster ageratoides var. firmus (Diels) Hand.-Mazz.
    » Subspecies Aster ageratoides subsp. trinervius (Roxb. ex D.Don) Grierson accepted as Aster ageratoides var. firmus (Diels) Hand.-Mazz.
    » Subspecies Aster ageratoides subsp. tubulosus Kitam. accepted as Aster ageratoides Turcz.
    » Subspecies Aster ageratoides subsp. yakushimensis Kitam. accepted as Aster yakushimensis (Kitam.) Soejima & Yahara
    » Subspecies Aster ageratoides subsp. yoshinaganus Kitam. accepted as Aster yoshinaganus (Kitam.) Mot.Ito & Soejima
    » Variety Aster ageratoides var. adustus Maxim. accepted as Aster ageratoides Turcz.
    » Variety Aster ageratoides var. adustus Nakai accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
    » Variety Aster ageratoides var. alpinus Koidz. accepted as Aster viscidulus var. alpinus (Koidz.) Kitam.
    » Variety Aster ageratoides var. amplexicaulis Makino accepted as Aster semiamplexicaulis (Makino) Makino ex Koidz.
    » Variety Aster ageratoides var. amplexifolius (Siebold & Zucc.) Kitam. accepted as Aster satsumensis Soejima
    » Variety Aster ageratoides var. angustifolius (Kitam.) Kitam. accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
    » Variety Aster ageratoides var. harai (Makino) Kitam. accepted as Aster ageratoides Turcz.
    » Variety Aster ageratoides var. leiophyllus (Franch. & Sav.) Ling accepted as Aster ageratoides Turcz.
    » Variety Aster ageratoides var. leiophyllus (Franch. & Savat.) Y.Ling accepted as Aster ageratoides Turcz.
    » Variety Aster ageratoides var. littoricola Kitam. accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
    » Variety Aster ageratoides var. microcephalus (Miq.) Ohwi accepted as Aster ovatus var. microcephalus (Miq.) Mot.Ito & Soejima
    » Variety Aster ageratoides var. ovata (Franch. & Sav.) Nakai accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
    » Variety Aster ageratoides var. ovatus (Franch. & Sav.) Hand.-Mazz. accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
    » Variety Aster ageratoides var. pilosus (Diels) Hand.-Mazz. accepted as Aster ageratoides var. ageratoides
    » Variety Aster ageratoides var. ripensis (Makino) Ohwi accepted as Aster ovatus var. ripensis (Makino) Mot.Ito & Soejima
    » Variety Aster ageratoides var. robustus (Koidz.) Makino & Nemoto accepted as Aster ageratoides Turcz.
    » Variety Aster ageratoides var. scaberulus (Miq.) Ling accepted as Aster ageratoides var. firmus (Diels) Hand.-Mazz.
    » Variety Aster ageratoides var. scaberulus (Miq.) Y.Ling accepted as Aster ageratoides var. firmus (Diels) Hand.-Mazz.
    » Variety Aster ageratoides var. semiamplexicaulis (Makino) Ohwi accepted as Aster semiamplexicaulis (Makino) Makino ex Koidz.
    » Variety Aster ageratoides var. spathulatus Kitam. accepted as Aster trinervius var. trinervius
    » Variety Aster ageratoides var. sugimotoi Kitam. ex Ohwi accepted as Aster sugimotoi Kitam.
    » Variety Aster ageratoides var. trinervius (Roxb. ex D.Don) Hand.-Mazz. accepted as Aster ageratoides var. firmus (Diels) Hand.-Mazz.
    » Variety Aster ageratoides var. tubulosus (Makino) Ohwi accepted as Aster ageratoides Turcz.
    » Variety Aster ageratoides var. vernalis Honda accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
    » Variety Aster ageratoides var. viscidulus (Makino) Kitam. accepted as Aster viscidulus (Makino) Makino
    » Variety Aster ageratoides var. yoshinaganus (Kitam.) Ohwi accepted as Aster yoshinaganus (Kitam.) Mot.Ito & Soejima
    » Forma Aster ageratoides f. albidus Kitam. (uncertain > unassessed)
    » Subspecies Aster ageratoides subsp. lasiocladus (Hayata) Kitam. (uncertain > unassessed)
    » Subspecies Aster ageratoides subsp. tubulosus Makino (uncertain > unassessed)
    » Variety Aster ageratoides var. gerlachii (Hance) Chang ex Ling (uncertain > unassessed)
    » Variety Aster ageratoides var. gerlachii (Hance) Chang ex Y.Ling (uncertain > unassessed)
    » Variety Aster ageratoides var. heterophyllus Maxim. (uncertain > unassessed)
    » Variety Aster ageratoides var. hortensis (Makino) Kitam. (uncertain > unassessed)
    » Variety Aster ageratoides var. humilis Kitam. (uncertain > unassessed)
    » Variety Aster ageratoides var. humilis Nakai (uncertain > unassessed)
    » Variety Aster ageratoides var. lasiocladus (Hayata) Hand.-Mazz. (uncertain > unassessed)
    » Variety Aster ageratoides var. micranthus Ling (uncertain > unassessed)
    » Variety Aster ageratoides var. micranthus Y.Ling (uncertain > unassessed)
    » Variety Aster ageratoides var. oophyllus Ling ex J.Q.Fu (uncertain > unassessed)
    » Variety Aster ageratoides var. oophyllus Y.Ling (uncertain > unassessed)
    » Variety Aster ageratoides var. oophyllus Ling (uncertain > unassessed)
    » Variety Aster ageratoides var. pendulus W.P.Li & G.X.Chen (uncertain > unassessed)
    » Variety Aster ageratoides var. vernalis Kitam. (uncertain > unassessed)
  » Species Aster aitchisonii Boiss.
  » Species Aster alatipes Hemsl.
  » Species Aster albescens (DC.) Wall. ex Hand.-Mazz.
    » Variety Aster albescens var. albescens
    » Variety Aster albescens var. discolor Y.Ling
    » Variety Aster albescens var. glandulosus Hand.-Mazz. accepted as Aster albescens (DC.) Wall. ex Hand.-Mazz.
    » Variety Aster albescens var. megaphyllus Y.Ling accepted as Aster albescens (DC.) Wall. ex Hand.-Mazz.
    » Variety Aster albescens var. niveus Hand.-Mazz. accepted as Aster albescens (DC.) Wall. ex Hand.-Mazz.
    » Variety Aster albescens var. rugosus Y.Ling accepted as Aster albescens (DC.) Wall. ex Hand.-Mazz.
    » Variety Aster albescens var. glabratus (Diels) Boufford & Y.S.Chen (uncertain > unassessed)
    » Variety Aster albescens var. gracilior (Hand.-Mazz.) Hand.-Mazz. (uncertain > unassessed)
    » Variety Aster albescens var. levissimus Hand.-Mazz. (uncertain > unassessed)
    » Variety Aster albescens var. limprichtii (Diels) Hand.-Mazz. (uncertain > unassessed)
    » Variety Aster albescens var. pilosus Hand.-Mazz. (uncertain > unassessed)
    » Variety Aster albescens var. salignus (Franch.) Hand.-Mazz. (uncertain > unassessed)
  » Species Aster alpinoamellus Novopokr. ex Tzvelev
  » Species Aster alpinus L.
    » Subspecies Aster alpinus subsp. alpinus
    » Subspecies Aster alpinus subsp. bohemicus (Rchb.) Dostál
    » Subspecies Aster alpinus subsp. breyninus (Beck) Hayek
    » Subspecies Aster alpinus subsp. cebennensis (Braun-Blanq. & al.) Braun-Blanq. & al.
    » Subspecies Aster alpinus subsp. cylleneus (Boiss. & Orph.) Hayek
    » Subspecies Aster alpinus subsp. glabratus (Herbich) Dostál
    » Subspecies Aster alpinus subsp. parviceps Novopokr.
    » Subspecies Aster alpinus subsp. subvillosus (Schur) Dostál
    » Subspecies Aster alpinus subsp. tolmatschevii (Tamamsch.) Á.Löve & D.Löve
    » Subspecies Aster alpinus subsp. vierhapperi Onno
    » Variety Aster alpinus var. alpinus L.
    » Variety Aster alpinus var. serpentimontanus (Tamamsch.)
    » Subspecies Aster alpinus subsp. dolomiticus (Beck) Hayek accepted as Aster alpinus L.
    » Subspecies Aster alpinus subsp. serpentimontanus (Tamamsch.) Á.Löve & D.Löve accepted as Aster alpinus var. serpentimontanus (Tamamsch.)
    » Variety Aster alpinus var. bohemicus Rchb. accepted as Aster alpinus L.
    » Variety Aster alpinus var. breyninus Beck accepted as Aster alpinus L.
    » Variety Aster alpinus var. cebennensis Braun-Blanq. accepted as Aster alpinus L.
    » Variety Aster alpinus var. cylleneus Boiss. & Orph. accepted as Aster alpinus L.
    » Variety Aster alpinus var. dolomiticus Beck accepted as Aster alpinus L.
    » Variety Aster alpinus var. glaber Rostański accepted as Aster alpinus L.
    » Variety Aster alpinus var. glabratus Herbich accepted as Aster alpinus L.
    » Variety Aster alpinus var. serpentimontanus (Tamamsch.) Ling ex J.Q.Fu accepted as Aster alpinus var. serpentimontanus (Tamamsch.)
    » Variety Aster alpinus var. subvillosus Schur accepted as Aster alpinus L.
    » Variety Aster alpinus var. vierhapperi (Onno) Cronquist accepted as Aster alpinus subsp. vierhapperi Onno
    » Variety Aster alpinus var. brachyglossus Onno (uncertain > unassessed)
    » Variety Aster alpinus var. diversisquamus Y.Ling (uncertain > unassessed)
    » Variety Aster alpinus var. diversisquamus Ling (uncertain > unassessed)
    » Variety Aster alpinus var. fallax (Tamamsch.) Y.Ling (uncertain > unassessed)
    » Variety Aster alpinus var. hispida Lag. & Rodr. (uncertain > unassessed)
  » 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
    » Forma Aster arenarius f. albiflorus (Y.N.Lee) M.Kim (uncertain > unassessed)
    » Forma Aster arenarius f. purpurascens (Y.N.Lee) M.Kim (uncertain > unassessed)
  » Species Aster argyi H.Lév.
  » Species Aster argyropholis Hand.-Mazz.
  » Species Aster asa-grayi Makino
  » Species Aster ascendens Lindl.
  » Species Aster asteroides (DC.) Kuntze
    » Subspecies Aster asteroides subsp. asteroides
    » Subspecies Aster asteroides subsp. costei (H.Lév.) Grierson
    » Forma Aster asteroides f. asteroides accepted as Aster asteroides (DC.) Kuntze
    » Forma Aster asteroides f. paludosus Y.Ling (uncertain > unassessed)
  » Species Aster auriculatus Franch.
    » Forma Aster auriculatus f. auriculatus Franch. accepted as Aster auriculatus Franch.
    » Variety Aster auriculatus var. auriculatus accepted as Aster auriculatus Franch.
    » Forma Aster auriculatus f. crenatus Y.Ling (uncertain > unassessed)
    » Variety Aster auriculatus var. oligocephalus Ling (uncertain > unassessed)
  » Species Aster baccharoides (Benth.) Steetz
    » Variety Aster baccharoides var. baccharoides accepted as Aster baccharoides (Benth.) Steetz
    » Variety Aster baccharoides var. kanehirai Yamam. (uncertain > unassessed)
  » 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
    » Forma Aster flaccidus f. flaccidus
    » Subspecies Aster flaccidus subsp. flaccidus
    » Variety Aster flaccidus var. flaccidus Bunge
    » Forma Aster flaccidus f. glabratus Y.Ling accepted as Aster flaccidus Bunge
    » Forma Aster flaccidus f. gracilis J.Q.Fu accepted as Aster flaccidus Bunge
    » Forma Aster flaccidus f. griseobarbatus Grierson accepted as Aster flaccidus Bunge
    » Forma Aster flaccidus f. ovatifolius J.Q.Fu accepted as Aster flaccidus Bunge
    » Subspecies Aster flaccidus subsp. glandulosus (Keissl.) Onno accepted as Aster flaccidus Bunge
    » Subspecies Aster flaccidus subsp. tsarungensis Grierson accepted as Aster tsarungensis (Grierson) Y.Ling
    » Variety Aster flaccidus var. fructoglandulosus Ostenf. accepted as Aster flaccidus Bunge
    » Variety Aster flaccidus var. glandulous Keissl. accepted as Aster flaccidus Bunge
    » Forma Aster flaccidus f. stolonifer Onno (uncertain > unassessed)
    » Variety Aster flaccidus var. atropurpureus Onno (uncertain > unassessed)
  » 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.
    » Variety Aster fuscescens var. fuscescens
    » Variety Aster fuscescens var. scaberoides C.C.Chang
    » Variety Aster fuscescens var. oblongifolius Grierson (uncertain > unassessed)
  » Species Aster giraldii Diels
  » Species Aster glehnii F.Schmidt
    » Variety Aster glehnii var. glehnii
    » Variety Aster glehnii var. hondoensis Kitam.
  » Species Aster gracilicaulis Y.Ling ex J.Q.Fu
  » Species Aster handelii Onno
  » Species Aster harrowianus Diels
    » Variety Aster harrowianus var. harrowianus accepted as Aster harrowianus Diels
    » Variety Aster harrowianus var. glabratus Diels (uncertain > unassessed)
    » Variety Aster harrowianus var. pycnophyllus (Franch. ex Diels) H.Lév. (uncertain > unassessed)
  » 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.
    » Variety Aster hispidus var. hispidus
    » Variety Aster hispidus var. insularis (Makino) Mot.Ito
    » Variety Aster hispidus var. koidzumianus (Kitam.) Mot.Ito
    » Variety Aster hispidus var. leptocladus (Makino) Mot.Ito
    » Variety Aster hispidus var. decipiens (Maxim.) Ling accepted as Aster hispidus Thunb.
    » Variety Aster hispidus var. koidzumianus (Kitam.) Mot.Ito & Soejima accepted as Aster hispidus var. koidzumianus (Kitam.) Mot.Ito
    » Variety Aster hispidus var. mesochaeta Franch. & Sav. accepted as Aster hispidus Thunb.
    » Forma Aster hispidus f. leptocladus (Makino) Kumekawa, J.Yokoy. & Tat.Fukuda (uncertain > unassessed)
    » Forma Aster hispidus f. tubuliflorus Kumekawa, J.Yokoy. & Tat.Fukuda (uncertain > unassessed)
    » Variety Aster hispidus var. heterochaeta Franch. & Sav. (uncertain > unassessed)
    » Variety Aster hispidus var. insularis (Makino) Mot.Ito & Soejima (uncertain > unassessed)
    » Variety Aster hispidus var. leptocladus (Makino) Mot.Ito & Soejima (uncertain > unassessed)
    » Variety Aster hispidus var. microphyllus Pamp. (uncertain > unassessed)
    » Variety Aster hispidus var. tubulosus K.Asano ex T.Shimizu (uncertain > unassessed)
  » 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
    » Variety Aster incisa var. incisa accepted as Aster incisa
    » Variety Aster incisa var. yomena Kitam. accepted as Aster yomena (Kitam.) Honda
  » Species Aster indamellus Grierson
  » Species Aster indicus L.
    » Variety Aster indicus var. indicus accepted as Aster indicus L.
    » Variety Aster indicus var. lautureanus Yamam. accepted as Kalimeris shimadai (Kitam.) Kitam.
    » Variety Aster indicus var. pinnatifidus Maxim. accepted as Aster iinumae Kitam. ex Hara
    » Variety Aster indicus var. collinus (Hance) Soejima & Igari (uncertain > unassessed)
    » Variety Aster indicus var. stenolepis (Hand.-Mazz.) Soejima & Igari (uncertain > unassessed)
  » 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
    » Variety Aster limprichtii var. limprichtii accepted as Aster limprichtii Diels
    » Variety Aster limprichtii var. gracilior Hand.-Mazz. (uncertain > unassessed)
  » 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.
    » Variety Aster miser var. abbreviatus DC. accepted as Symphyotrichum lateriflorum (L.) Á.Löve & D.Löve
    » Variety Aster miser var. glomerellus Torr. & A.Gray accepted as Symphyotrichum lateriflorum (L.) Á.Löve & D.Löve
    » Variety Aster miser var. miserrimus Torr. & A.Gray accepted as Symphyotrichum lateriflorum (L.) Á.Löve & D.Löve
    » Variety Aster miser var. myrtifolius (Willd.) DC. accepted as Symphyotrichum lateriflorum (L.) Á.Löve & D.Löve
    » Variety Aster miser var. vimineus (Lam.) Farw. accepted as Symphyotrichum lateriflorum (L.) Á.Löve & D.Löve
    » Variety Aster miser var. diffusus (Aiton) L.C.Beck (uncertain > unassessed)
    » Variety Aster miser var. hirsuticaulis (Lindl. ex DC.) Torr. & A.Gray (uncertain > unassessed)
    » Variety Aster miser var. lateriflorus Torr. & A.Gray (uncertain > unassessed)
    » Variety Aster miser var. pendulus (Dryand.) L.C.Beck (uncertain > unassessed)
  » 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
    » Subspecies Aster novae-belgiae subsp. novae-belgiae accepted as Aster novae-belgiae
    » Variety Aster novae-belgiae var. novae-belgiae accepted as Aster novae-belgiae
    » Subspecies Aster novae-belgiae subsp. floribundus (uncertain > unassessed)
    » Subspecies Aster novae-belgiae subsp. laevigatus (uncertain > unassessed)
    » Subspecies Aster novae-belgiae subsp. stenolepis (uncertain > unassessed)
    » Variety Aster novae-belgiae var. stenolepis (uncertain > unassessed)
  » 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.
    » Variety Aster salsuginosus var. salsuginosus accepted as Aster salsuginosus Richardson ex R.Br.
    » Variety Aster salsuginosus var. angustifolius A.Gray (uncertain > unassessed)
    » Variety Aster salsuginosus var. scaposus Torr. & A.Gray (uncertain > unassessed)
  » Species Aster salwinensis Onno
  » Species Aster sampsonii (Hance) Hemsl.
    » Variety Aster sampsonii var. sampsonii accepted as Aster sampsonii (Hance) Hemsl.
    » Variety Aster sampsonii var. isochaetus C.C.Chang (uncertain > unassessed)
  » 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.
    » Variety Aster souliei var. souliei accepted as Aster souliei Franch.
    » Variety Aster souliei var. limitaneus (W.W.Sm. & Farrer) Hand.-Mazz. (uncertain > unassessed)
  » 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.
    » Variety Aster subulatus var. obtusifolius Fernald
    » Variety Aster subulatus var. parviflorus (Nees) Sünd.
    » Variety Aster subulatus var. subulatus
    » Variety Aster subulatus var. australis (A.Gray) Shinners accepted as Aster squamatus (Spreng.) Hieron.
    » Variety Aster subulatus var. bahamensis (Britton) Bosser. accepted as Symphyotrichum subulatum var. elongatum (Boss. ex A.G.Jones & Lowry) S.D.Sundb.
    » Variety Aster subulatus var. cubensis (DC.) Shinners accepted as Symphyotrichum subulatum var. parviflorum (Nees) S.D.Sundb.
    » Variety Aster subulatus var. elongatus accepted as Symphyotrichum subulatum var. elongatum (Boss. ex A.G.Jones & Lowry) S.D.Sundb.
    » Variety Aster subulatus var. elongatus Boss. ex A.G.Jones & Lowry accepted as Symphyotrichum subulatum var. elongatum (Boss. ex A.G.Jones & Lowry) S.D.Sundb.
    » Variety Aster subulatus var. euroauster Fernald & Griscom accepted as Aster subulatus Michx.
    » Variety Aster subulatus var. ligulatus Shinners accepted as Symphyotrichum subulatum var. ligulatum (Shinners) S.D.Sundb.
    » Variety Aster subulatus var. sandwicensis (A.Gray) A.G.Jones accepted as Aster squamatus (Spreng.) Hieron.
  » 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.
    » Forma Aster tongolensis f. ramosus Y.Ling accepted as Aster tongolensis Franch.
    » Forma Aster tongolensis f. tongolensis accepted as Aster tongolensis Franch.
    » Subspecies Aster tongolensis subsp. tongolensis accepted as Aster tongolensis Franch.
    » Variety Aster tongolensis var. tongolensis accepted as Aster tongolensis Franch.
    » Subspecies Aster tongolensis subsp. forrestii (Stapf) Onno (uncertain > unassessed)
    » Variety Aster tongolensis var. typicus Onno (uncertain > unassessed)
  » Species Aster tricapitatus Vaniot
  » Species Aster tricephalus C.B.Clarke
  » Species Aster trichoneurus Y.Ling
  » Species Aster trinervius Roxb. ex Roxb.
    » Variety Aster trinervius var. trinervius
    » Forma Aster trinervius f. hortensis Makino accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
    » Forma Aster trinervius f. trinervius accepted as Aster trinervius Roxb. ex Roxb.
    » Subspecies Aster trinervius subsp. ageratoides (Turcz.) Grierson accepted as Aster ageratoides Turcz.
    » Subspecies Aster trinervius subsp. amplexifolius (Sieb. & Zucc.) Kitam. accepted as Aster semiamplexicaulis (Makino) Makino ex Koidz.
    » Subspecies Aster trinervius subsp. angustifolius (Kitam.) Kitam. accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
    » Subspecies Aster trinervius subsp. leiophyllus (Franch. & Sav.) Kitam. accepted as Aster ageratoides Turcz.
    » Subspecies Aster trinervius subsp. microcephalus Kitam. accepted as Aster ovatus var. microcephalus (Miq.) Mot.Ito & Soejima
    » Subspecies Aster trinervius subsp. ovatus (Franch. & Sav.) Kitam. accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
    » Subspecies Aster trinervius subsp. ripensis (Makino) Kitam. accepted as Aster ovatus var. ripensis (Makino) Mot.Ito & Soejima
    » Subspecies Aster trinervius subsp. sugimotoi (Kitam.) Kitam. accepted as Aster sugimotoi Kitam.
    » Subspecies Aster trinervius subsp. trinervius accepted as Aster trinervius Roxb. ex Roxb.
    » Subspecies Aster trinervius subsp. yakusimensis (Kitam.) Kitam. accepted as Aster yakushimensis (Kitam.) Soejima & Yahara
      » Forma Aster trinervius subsp. yakusimensis f. albidus (Kitam.) Kitam. accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
      » Forma Aster trinervius subsp. yakusimensis f. albo-variegatus Kitam. accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
      » Forma Aster trinervius subsp. yakusimensis f. purpurascens (Honda) Kitam. accepted as Aster ageratoides Turcz.
      » Variety Aster trinervius subsp. yakusimensis var. harai (Makino) Makino ex Kitam. accepted as Aster ageratoides Turcz.
      » Variety Aster trinervius subsp. yakusimensis var. littoricola (Kitam.) Kitam. accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
      » Variety Aster trinervius subsp. yakusimensis var. megarocephalus (Kitam.) Kitam. accepted as Aster ageratoides Turcz.
      » Variety Aster trinervius subsp. yakusimensis var. ovalifolius (Kitam.) Kitam. accepted as Aster ageratoides var. ovalifolius Kitam.
      » Variety Aster trinervius subsp. yakusimensis var. sawadanus (Kitam.) Kitam. accepted as Aster ageratoides var. sawadanus Kitam.
      » Variety Aster trinervius subsp. yakusimensis var. stenophyllus Kitam. accepted as Aster ageratoides Turcz.
      » Variety Aster trinervius subsp. yakusimensis var. tenuifolius (Kitam.) Kitam. accepted as Aster ageratoides var. tenuifolius Kitam.
      » Variety Aster trinervius subsp. yakusimensis var. vernalis (Honda) Kitam. accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
      » Variety Aster trinervius subsp. yakusimensis var. yezoensis Kitam. accepted as Aster ovatus var. yezoensis (Kitam. & Hara) Mot.Ito & Soejima
    » Subspecies Aster trinervius subsp. yoshinaganus (Kitam.) Kitam. accepted as Aster yoshinaganus (Kitam.) Mot.Ito & Soejima
    » Variety Aster trinervius var. adusta Maxim. ex Franch. & Sav. accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
    » Variety Aster trinervius var. adustus Kom. accepted as Aster ageratoides Turcz.
    » Variety Aster trinervius var. angustifolius Franch. & Sav. accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
    » Variety Aster trinervius var. congesta Franch. & Sav. accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
    » Variety Aster trinervius var. firmus Diels accepted as Aster ageratoides var. firmus (Diels) Hand.-Mazz.
    » Variety Aster trinervius var. grossedentatus Franch. ex Diels accepted as Aster ageratoides var. grossedentatus (Franch. ex Diels) Kitam.
    » Variety Aster trinervius var. harai Makino accepted as Aster ageratoides Turcz.
    » Variety Aster trinervius var. longifolius Franch. & Sav. accepted as Aster tataricus L.f.
    » Variety Aster trinervius var. microcephalus (Miq.) Makino accepted as Aster ovatus var. microcephalus (Miq.) Mot.Ito & Soejima
    » Variety Aster trinervius var. oligocephalus Nemoto accepted as Aster ageratoides Turcz.
    » Variety Aster trinervius var. ovatus Franch. & Sav. accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima
    » Variety Aster trinervius var. pilosus Diels accepted as Aster ageratoides var. ageratoides
    » Variety Aster trinervius var. potaninii Diels accepted as Aster ageratoides var. potaninii (Diels) Kitam.
    » Variety Aster trinervius var. purpurascens (Honda) Nemoto accepted as Aster ageratoides Turcz.
    » Variety Aster trinervius var. robustus Koidz. accepted as Aster ageratoides Turcz.
    » Variety Aster trinervius var. semiamplexicaulis (Makino) Makino accepted as Aster semiamplexicaulis (Makino) Makino ex Koidz.
    » Variety Aster trinervius var. sugimotoi Kitam. accepted as Aster sugimotoi Kitam.
    » Variety Aster trinervius var. viscidulus Makino accepted as Aster viscidulus (Makino) Makino
    » Forma Aster trinervius f. pubescens Kuntze (uncertain > unassessed)
    » Variety Aster trinervius var. hayatae Yamam. (uncertain > unassessed)
    » Variety Aster trinervius var. lasiocladus (Hayata) Yamam. (uncertain > unassessed)
    » Variety Aster trinervius var. rosthornii Diels (uncertain > unassessed)
    » Variety Aster trinervius var. scandens Hayata (uncertain > unassessed)
  » Species Aster trinervius Roxb. ex D.Don
    » Variety Aster trinervius var. wattii (C.B.Clarke) Grierson
    » Subspecies Aster trinervius subsp. ovatus Franch. & Sav. (uncertain > unassessed)
    » Variety Aster trinervius var. adustus Maxim. (uncertain > unassessed)
    » Variety Aster trinervius var. ovatus Franch. & Sav. (uncertain > unassessed)
    » Variety Aster trinervius var. trinervius Roxb. ex D.Don (uncertain > unassessed)
  » 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
    » Variety Aster yomena var. dentatus (Kitam.) Hara
    » Variety Aster yomena var. yomena
    » Variety Aster yomena var. angustifolius (Nakai) Soejima & Igari (uncertain > unassessed)
  » 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 Rothr. accepted as Symphyotrichum spathulatum (Lindl.) G.L.Nesom
  » Species Aster aestivus Dryand. ex Aiton accepted as Symphyotrichum novi-belgii var. novi-belgii (L.)
  » 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 Reiche accepted as Noticastrum sericeum (Less.) Less. ex Phil.
  » Species Aster albus (Phil.) Kuntze accepted as Noticastrum sericeum (Less.) Less. ex Phil.
  » Species Aster albus (Nutt.) Eaton accepted as Solidago ptarmicoides (Torr. & A.Gray) B.Boivin
  » Species Aster albus Willd. ex Spreng. accepted as Aster amellus L.
  » Species Aster albus (Nutt.) Eaton & Wright accepted as Solidago ptarmicoides (Torr. & A.Gray) B.Boivin
  » 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
    » Subspecies Aster alpigenus subsp. alpigenus accepted as Aster alpigenus (Torr. & A.Gray) A.Gray
    » Subspecies Aster alpigenus subsp. andersonii (A.Gray) Onno accepted as Oreostemma alpigenum var. andersonii (A.Gray) G.L.Nesom
    » Subspecies Aster alpigenus subsp. haydenii (Porter) Cronquist accepted as Oreostemma alpigenum var. haydenii (Porter) G.L.Nesom
    » Subspecies Aster alpigenus subsp. typicus Onno accepted as Oreostemma alpigenum var. andersonii (A.Gray) G.L.Nesom
    » Variety Aster alpigenus var. alpigenus accepted as Aster alpigenus (Torr. & A.Gray) A.Gray
    » Variety Aster alpigenus var. andersonii (A.Gray) Onno ex M.Peck accepted as Oreostemma alpigenum var. andersonii (A.Gray) G.L.Nesom
    » Variety Aster alpigenus var. haydenii (Porter) Cronquist accepted as Oreostemma alpigenum var. haydenii (Porter) G.L.Nesom
    » Subspecies Aster alpigenus subsp. vierhapperi Onno (uncertain > unassessed)
  » 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.
    » Variety Aster alyssoides var. alyssoides accepted as Aster alyssoides Turcz.
    » Variety Aster alyssoides var. achnolepis Hand.-Mazz. (uncertain > unassessed)
  » 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 Hoffm. accepted as Aster amellus L.
  » Species Aster amelloides Besser accepted as Aster amellus subsp. bessarabicus (Bernh. ex Rchb.) Soó
  » 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
    » Forma Aster amethystinus f. amethystinus accepted as Aster amethystinus Nutt.
    » Forma Aster amethystinus f. leucerythros Bemis (uncertain > unassessed)
    » Forma Aster amethystinus f. leucos Bemis (uncertain > unassessed)
  » 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 Kuntze accepted as Olearia oleifolia Kirk
  » Species Aster angustatus (Lindl.) Torr. & A.Gray accepted as Symphyotrichum ciliatum (Ledeb.) G.L.Nesom
  » Species Aster angustifolius C.C.Chang accepted as Miyamayomena angustifolia (Hand.-Mazz.) Y.L.Chen
  » Species Aster angustifolius Lindl. ex Royle accepted as Kalimeris altaica (Willd.) Nees ex Fisch.Mey. & Avé-Lall.
  » Species Aster angustifolius Lindl. accepted as Kalimeris altaica (Willd.) Nees ex Fisch.Mey. & Avé-Lall.
  » Species Aster angustifolius Jacq. accepted as Felicia hyssopifolia subsp. hyssopifolia (P.J.Bergius) Nees
  » Species Aster angustifolius Chang accepted as Aster sinoangustifolius Brouillet, Semple & Y. L. Chen
  » 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. accepted as Symphyotrichum sericeum (Vent.) G.L.Nesom (unaccepted)
  » Species Aster argentinensis Cabrera accepted as Noticastrum argentinense (Cabrera) Cuatrec. (unaccepted)
  » Species Aster argophyllus Labill. accepted as Olearia argophylla (Labill.) F.Muell. ex Benth. (unaccepted)
    » Variety Aster argophyllus var. argophyllus Labill. accepted as Aster argophyllus Labill.
    » Variety Aster argophyllus var. oliganthemus F.Muell. (uncertain > unassessed)
  » Species Aster argunensis DC. accepted as Aster flaccidus Bunge (unaccepted)
  » Species Aster argutus (Aiton) Kuntze accepted as Solidago arguta Aiton (unaccepted)
  » Species Aster argutus Nees accepted as Symphyotrichum novi-belgii (L.) G.L.Nesom (unaccepted)
  » Species Aster argutus R.Br. ex Benth. accepted as Olearia arguta (R.Br.) Benth. (unaccepted)
  » Species Aster armenus (Boiss.) Kuntze accepted as Galatella sedifolia subsp. dracunculoides (Lam.) Greuter (unaccepted)
  » Species Aster armeriifolius Greene accepted as Symphyotrichum ascendens (Lindl.) G.L.Nesom (unaccepted)
  » Species Aster armeriodes Kuntze accepted as Stenotus armerioides var. armerioides Nutt. (unaccepted)
  » Species Aster armoricanus (Rouy) A.W.Hill accepted as Galatella linosyris subsp. armoricana (Rouy) Greuter (unaccepted)
  » Species Aster artemisiiflorus Poir. accepted as Symphyotrichum tradescantii (L.) G.L.Nesom (unaccepted)
  » Species Aster artemisioides F.Muell. accepted as Olearia tubuliflora Benth. (unaccepted)
  » Species Aster asae Kuntze accepted as Ericameria paniculata (A.Gray) A.Gray ex Rydb. (unaccepted)
  » Species Aster ascendens Lindl. accepted as Symphyotrichum ascendens (Lindl.) G.L.Nesom (unaccepted)
    » Variety Aster ascendens var. ascendens accepted as Aster ascendens Lindl.
    » Variety Aster ascendens var. ciliatifolius (Nutt.) Torr. & A.Gray accepted as Symphyotrichum ascendens (Lindl.) G.L.Nesom
    » Variety Aster ascendens var. denudatus (Nutt.) Torr. & A.Gray accepted as Symphyotrichum ascendens (Lindl.) G.L.Nesom
    » Variety Aster ascendens var. fremontii Torr. & A.Gray accepted as Symphyotrichum spathulatum var. spathulatum (Lindl.) G.L.Nesom
    » Variety Aster ascendens var. parryi D.C.Eaton accepted as Symphyotrichum foliaceum var. parryi (D.C.Eaton) G.L.Nesom
    » Variety Aster ascendens var. yosemitanus A.Gray accepted as Symphyotrichum spathulatum var. yosemitanum (A.Gray) G.L.Nesom
    » Variety Aster ascendens var. intermedius (uncertain > unassessed)
  » Species Aster aspargioides (A.Gray) Kuntze accepted as Pyrrocoma apargioides (A.Gray) Greene (unaccepted)
  » Species Aster asper (Less.) Schönland accepted as Aster bakerianus Burtt Davy ex C.A.Sm. (unaccepted)
  » Species Aster asper Schönland accepted as Aster bakerianus Burtt Davy ex C.A.Sm. (unaccepted)
  » Species Aster asperatus Kuntze accepted as Solidago patula Muhl. ex Willd. (unaccepted)
  » Species Aster asperellus (Rech.f. & Köie) Leins & Podlech accepted as Varthemia asperella Rech.f. & Köie (unaccepted)
  » Species Aster asperifolius E.S.Burgess accepted as Symphyotrichum undulatum (L.) G.L.Nesom (unaccepted)
  » Species Aster asperrimus Nutt. accepted as Symphyotrichum grandiflorum (L.) G.L.Nesom (unaccepted)
  » Species Aster asperugineus D.C.Eaton accepted as Erigeron asperugineus (D.C.Eaton) A.Gray (unaccepted)
  » Species Aster asperulus (DC.) Wall. ex Hook.f. accepted as Aster peduncularis Wall. ex Nees (unaccepted)
  » Species Aster asperulus Torr. & A.Gray accepted as Symphyotrichum undulatum (L.) G.L.Nesom (unaccepted)
  » Species Aster associatus Kitag. accepted as Kalimeris lautureana (Debeaux) Kitam. (unaccepted)
  » Species Aster asterellus Bornm. accepted as Chamaegeron asterellus (Bornm.) Botsch. (unaccepted)
  » Species Aster asteroides (Colla) Rusby accepted as Aster squamatus (Spreng.) Hieron. (unaccepted)
  » Species Aster asteroides (L.) MacMill. accepted as Sericocarpus asteroides (L.) Britton, Sterns & Poggenb. (unaccepted)
  » Species Aster asterotrichus (F.Muell.) F.Muell. accepted as Olearia asterotricha (F.Muell.) F.Muell. ex Benth. (unaccepted)
  » Species Aster atacamensis (Phil.) Kuntze accepted as Haplopappus rigidus Phil. (unaccepted)
  » Species Aster atenes Kuntze accepted as Haplopappus angustifolius (DC.) Reiche (unaccepted)
  » Species Aster attenuatus Lindl. accepted as Symphyotrichum laeve var. purpuratum (Nees) G.L.Nesom (unaccepted)
  » Species Aster attenuatus Lindl. ex Hook. accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster attenuatus (Howell) M.Peck accepted as Corethrogyne filaginifolia (Hook. & Arn.) Nutt. (unaccepted)
  » Species Aster attenuatus (Howell) Frye & Rigg accepted as Corethrogyne filaginifolia (Hook. & Arn.) Nutt. (unaccepted)
  » Species Aster atticus Pall. accepted as Aster amellus L. (unaccepted)
  » Species Aster aurantius L. accepted as Adenophyllum aurantium (L.) Strother (unaccepted)
  » Species Aster aureus (A.Gray) Kuntze accepted as Rayjacksonia aurea (A.Gray) R.L.Hartm. & M.A.Lane (unaccepted)
  » Species Aster aureus D.Don accepted as Solidago aurea Spreng. (unaccepted)
  » Species Aster auriculatus Schloss. ex Nyman accepted as Symphyotrichum ×salignum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster auritus Lindl. ex DC. accepted as Symphyotrichum patens (Aiton) G.L.Nesom (unaccepted)
  » Species Aster australis Hort. ex DC. accepted as Olearia ramulosa (Labill.) Benth. (unaccepted)
  » Species Aster autranii Post accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster autumnalis Wender. ex Nees, sec.Torr. & A.Gray accepted as Symphyotrichum undulatum (L.) G.L.Nesom (unaccepted)
  » Species Aster avicenniifolius (Hook.f.) Kuntze accepted as Olearia avicenniifolia (Raoul) Hook.f. (unaccepted)
  » Species Aster avicenniifolius (Hook.f.) F.Muell. accepted as Olearia avicenniifolia (Raoul) Hook.f. (unaccepted)
  » Species Aster avitus Alexander accepted as Eurybia avita (Alexander) G.L.Nesom (unaccepted)
  » Species Aster azureus Lindl. accepted as Symphyotrichum oolentangiense (Riddell) G.L.Nesom (unaccepted)
    » Forma Aster azureus f. azureus accepted as Aster azureus Lindl.
    » Variety Aster azureus var. azureus accepted as Aster azureus Lindl.
    » Variety Aster azureus var. incarnatus Farw. accepted as Symphyotrichum oolentangiense (Riddell) G.L.Nesom
    » Variety Aster azureus var. laevicaulis Fernald accepted as Symphyotrichum oolentangiense (Riddell) G.L.Nesom
    » Variety Aster azureus var. poaceus (E.S.Burgess ex E.S.Burgess) Fernald accepted as Symphyotrichum oolentangiense (Riddell) G.L.Nesom
    » Variety Aster azureus var. scabrior Engelm. ex Small accepted as Symphyotrichum oolentangiense (Riddell) G.L.Nesom
    » Variety Aster azureus var. scabrior Engelm. ex E.S.Burgess accepted as Symphyotrichum oolentangiense (Riddell) G.L.Nesom
    » Forma Aster azureus f. albidus Steyerm. (uncertain > unassessed)
    » Forma Aster azureus f. incarnatus Farw. (uncertain > unassessed)
    » Forma Aster azureus f. laevicaulis Fernald (uncertain > unassessed)
    » Variety Aster azureus var. poaceus (E.S.Burgess) G.L.Nesom (uncertain > unassessed)
  » Species Aster baccharodes Kuntze accepted as Solidago occidentalis (Nutt.) Torr. & A.Gray (unaccepted)
  » Species Aster baldwinii Torr. & A.Gray accepted as Symphyotrichum undulatum (L.) G.L.Nesom (unaccepted)
  » Species Aster ballii F.Muell. accepted as Olearia ballii (F.Muell.) F.Muell. ex Hemsl. (unaccepted)
  » Species Aster bangii Rusby accepted as Aster squamatus (Spreng.) Hieron. (unaccepted)
  » Species Aster barbatus (DC.) Harv. accepted as Felicia ovata (Thunb.) Compton (unaccepted)
  » Species Aster barcinonensis Sennen accepted as Aster squamatus (Spreng.) Hieron. (unaccepted)
  » Species Aster baronii Humbert accepted as Madagaster senecionoides (Baker) G.L.Nesom (unaccepted)
  » Species Aster batakensis Hayata accepted as Aster hispidus Thunb. (unaccepted)
  » Species Aster batesii Rydb. accepted as Symphyotrichum ×batesii (Rydb.) G.L.Nesom (unaccepted)
  » Species Aster baylahuen (J.Rémy) Kuntze accepted as Haplopappus baylahuen J.Rémy (unaccepted)
  » Species Aster beckleri (F.Muell.) F.Muell. accepted as Olearia cydoniifolia (DC.) Benth. (unaccepted)
  » Species Aster behrii Schltdl. accepted as Vittadinia australis A.Rich. (unaccepted)
  » Species Aster bellidiastrum Nees accepted as Erigeron andicola DC. (unaccepted)
  » Species Aster bellidiastrum (L.) Scop. accepted as Bellidastrum michelii Cass. (unaccepted)
  » Species Aster bellidiflorus Nees accepted as Symphyotrichum tradescantii (L.) G.L.Nesom (unaccepted)
  » Species Aster bellidiflorus Steud. accepted as Eurybia spectabilis (Sol. ex Aiton) G.L.Nesom (unaccepted)
  » Species Aster bellidiflorus Willd. accepted as Symphyotrichum lanceolatum subsp. lanceolatum var. lanceolatum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster bellidioides Buch.-Ham. ex D.Don accepted as Erigeron bellidioides (Hook.f.) S.J.Forbes & D.I.Morris (unaccepted)
  » Species Aster bellis E.H.L.Krause accepted as Bellis perennis L. (unaccepted)
  » Species Aster benghalensis B.Heyne ex DC. accepted as Erigeron sublyratus Roxb. ex DC. (unaccepted)
  » Species Aster benthamii Steetz accepted as Aster ageratoides var. firmus (Diels) Hand.-Mazz. (unaccepted)
  » Species Aster berberidis (A.Gray) Kuntze accepted as Hazardia berberidis (A.Gray) Greene (unaccepted)
  » Species Aster berberifolius A.Cunn. ex DC. accepted as Olearia myrsinoides (Labill.) F.Muell. ex Benth. (unaccepted)
  » Species Aster bergerianus (Spreng.) Harv. accepted as Felicia bergeriana (Spreng.) O.Hoffm. (unaccepted)
  » Species Aster berlandieri Kuntze accepted as Isocoma drummondii (Torr. & A.Gray) Greene (unaccepted)
  » Species Aster bernardinus H.M.Hall accepted as Symphyotrichum defoliatum (Parish) G.L.Nesom (unaccepted)
  » Species Aster berteroi (DC.) Kuntze accepted as Haplopappus chrysanthemifolius (Less.) DC. (unaccepted)
  » Species Aster bessarabicus Bernh. ex Rchb. accepted as Aster amellus subsp. bessarabicus (Bernh. ex Rchb.) Soó (unaccepted)
  » Species Aster bezanillana (J.Rémy) Kuntze accepted as Haplopappus bezanillanus (J.Rémy) Reiche (unaccepted)
  » Species Aster bicolor (L.) Nees accepted as Solidago bicolor L. (unaccepted)
  » Species Aster bicolor Dietr. ex DC. accepted as Symphyotrichum novi-belgii var. novi-belgii (L.) (unaccepted)
  » Species Aster bidwillii Kuntze accepted as Olearia virgata (Hook.f.) Hook.f. (unaccepted)
  » Species Aster biennis Ledeb. accepted as Kalimeris tatarica Lindl. ex DC. (unaccepted)
  » Species Aster biennis Torr. accepted as Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom (unaccepted)
  » Species Aster biennis Nutt. accepted as Dieteria canescens (Pursh) Nutt. (unaccepted)
  » Species Aster bifidus Nees accepted as Galatella sedifolia subsp. dracunculoides (Lam.) Greuter (unaccepted)
  » Species Aster biflorus (L.) Druce accepted as Galatella sedifolia subsp. biflora (L.) Sennikov (unaccepted)
  » Species Aster biflorus presc. ex DC. accepted as Eurybia sibirica (L.) G.L.Nesom (unaccepted)
  » Species Aster biflorus Michx. accepted as Eurybia radula (Sol. ex Aiton) G.L.Nesom (unaccepted)
  » Species Aster bifoliatus (Walter) H.E.Ahles accepted as Sericocarpus tortifolius (Michx.) Nees (unaccepted)
  » Species Aster bifrons Lindl. ex DC. accepted as Symphyotrichum lateriflorum (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster bifrons All. accepted as Inula bifrons L. (unaccepted)
  » Species Aster bigelovii A.Gray accepted as Dieteria bigelovii (A.Gray) D.R.Morgan & R.L.Hartm. (unaccepted)
  » Species Aster bimater Standl. & Steyerm. accepted as Symphyotrichum trilineatum (Sch.Bip. ex Klatt) G.L.Nesom (unaccepted)
  » Species Aster binominatus Kuntze accepted as Ericameria nauseosa var. bigelovii (A.Gray) G.L.Nesom & G.I.Baird (unaccepted)
  » Species Aster blakei (Porter) House accepted as Oclemena ×blakei (Porter) G.L.Nesom (unaccepted)
  » Species Aster blakei (Porter) Porter accepted as Oclemena ×blakei (Porter) G.L.Nesom (unaccepted)
  » Species Aster blandus Pursh accepted as Symphyotrichum puniceum (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster blepharophyllus A.Gray accepted as Arida blepharophylla (A.Gray) D.R.Morgan & R.L.Hartm. (unaccepted)
  » Species Aster bloomeri (A.Gray) Kuntze accepted as Ericameria bloomeri (A.Gray) J.F.Macbr. (unaccepted)
  » Species Aster bloomeri A.Gray accepted as Symphyotrichum campestre (Nutt.) G.L.Nesom (unaccepted)
  » Species Aster bodkinii Compton accepted as Felicia filifolia subsp. bodkinii (Compton) Grau (unaccepted)
  » Species Aster bolanderi (A.Gray) Kuntze accepted as Ericameria bolanderi (A.Gray) G.L.Nesom & G.I.Baird (unaccepted)
  » Species Aster boltoniae Greene accepted as Psilactis asteroides A.Gray (unaccepted)
  » Species Aster bonariensis Spreng. accepted as Erigeron glaucus Ker Gawl. (unaccepted)
  » Species Aster bonplandii Kuntze accepted as Solidago simplex var. simplex (unaccepted)
  » Species Aster borealis (Torr. & A.Gray) Prov. accepted as Symphyotrichum boreale (Torr. & A.Gray) Á.Löve & D.Löve (unaccepted)
  » Species Aster bostoniensis Hort. ex Baker accepted as Symphyotrichum ×amethystinum (Nutt.) G.L.Nesom (unaccepted)
  » Species Aster botryanthus K.Koch accepted as Symphyotrichum foliaceum (Lindl. ex DC.) G.L.Nesom (unaccepted)
  » Species Aster boweri Hemsl. accepted as Heteropappus boweri (Hemsl.) Grierson (unaccepted)
  » Species Aster boykinii E.S.Burgess accepted as Eurybia divaricata (L.) G.L.Nesom (unaccepted)
  » Species Aster bracei Britton ex Small accepted as Symphyotrichum tenuifolium var. aphyllum (R.W.Long) S.D.Sundb. (unaccepted)
  » Species Aster brachyactis S.F.Blake accepted as Symphyotrichum ciliatum (Ledeb.) G.L.Nesom (unaccepted)
  » Species Aster brachycomoides F.Muell. accepted as Camptacra gracilis (Benth.) Lander (unaccepted)
  » Species Aster brachylepis (A.Gray) Kuntze accepted as Ericameria brachylepis (A.Gray) H.M.Hall (unaccepted)
  » Species Aster brachypholis Small accepted as Symphyotrichum racemosum (Elliott) G.L.Nesom (unaccepted)
  » Species Aster brachyphyllus (Sond.) F.Muell. accepted as Olearia brachyphylla (F.Muell. ex Sond.) N.A.Wakef. (unaccepted)
  » Species Aster bracteatus Turcz. ex Herder accepted as Eurybia sibirica (L.) G.L.Nesom (unaccepted)
  » Species Aster bracteolatus Nutt. accepted as Symphyotrichum eatonii (A.Gray) G.L.Nesom (unaccepted)
  » Species Aster brandegeei (A.Gray) Kuntze accepted as Erigeron aureus Greene (unaccepted)
  » Species Aster breviflorus Phil. accepted as Erigeron fasciculatus Colla (unaccepted)
  » Species Aster brevilingulatus (Sch.Bip. ex Hemsl.) McVaugh accepted as Psilactis brevilingulata Sch.Bip. ex Hemsl. (unaccepted)
  » Species Aster brevipedunculatus Hutch. accepted as Felicia fruticosa subsp. brevipedunculata (Hutch.) Grau (unaccepted)
  » Species Aster brevipes Benth. accepted as Aster baccharoides (Benth.) Steetz (unaccepted)
  » Species Aster breviscapus Vaniot accepted as Erigeron breviscapus (Vaniot) Hand.-Mazz. (unaccepted)
  » Species Aster breyninus (Beck) Fritsch accepted as Aster alpinus L. (unaccepted)
  » Species Aster brickellioides Greene accepted as Eucephalus tomentellus (Greene) Greene (unaccepted)
  » Species Aster britannicus All. accepted as Inula britannica L. (unaccepted)
  » Species Aster brittonii Kuntze accepted as Solidago wrightii A.Gray (unaccepted)
  » Species Aster brumalis Nees accepted as Symphyotrichum novi-belgii (L.) G.L.Nesom (unaccepted)
  » Species Aster bubonium Scop. accepted as Inula spiraeifolia L. (unaccepted)
  » Species Aster buchananii Kuntze accepted as Olearia alpicola (F.Muell.) F.Muell. ex Benth. (unaccepted)
  » Species Aster buchubergensis Dinter accepted as Felicia hirsuta DC. (unaccepted)
  » Species Aster buckleyi (Torr. & A.Gray) Kuntze accepted as Solidago buckleyi Torr. & A.Gray (unaccepted)
  » Species Aster bullatus Klatt accepted as Symphyotrichum bullatum (Klatt) G.L.Nesom (unaccepted)
  » Species Aster bupleurifolius hort.monsp. ex Nees accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster burchellii Hook.f. accepted as Commidendrum burchellii (Hook.f.) Benth. & Hook.f. ex Hemsl. (unaccepted)
  » Species Aster burkei (A.Gray) Howell accepted as Symphyotrichum foliaceum (Lindl. ex DC.) G.L.Nesom (unaccepted)
  » Species Aster burkei Harv. accepted as Felicia burkei (Harv.) L.Bolus (unaccepted)
  » Species Aster bustillosianus (J.Rémy) Kuntze accepted as Haplopappus glutinosus Cass. (unaccepted)
  » Species Aster butleri Rydb. accepted as Symphyotrichum subspicatum (Nees) G.L.Nesom (unaccepted)
  » Species Aster cabrerae Ariza accepted as Symphyotrichum graminifolium (Spreng.) G.L.Nesom (unaccepted)
  » Species Aster cabulicus Lindl. accepted as Aster albescens (DC.) Wall. ex Hand.-Mazz. (unaccepted)
  » Species Aster caesius (L.) Kuntze accepted as Solidago caesia L. (unaccepted)
  » Species Aster caespitosus Hort. ex Lindl. accepted as Symphyotrichum novi-belgii (L.) G.L.Nesom (unaccepted)
  » Species Aster caespitosus (Nutt.) Kuntze accepted as Stenotus acaulis (Nutt.) Nutt. (unaccepted)
  » Species Aster caffrorum Less. accepted as Microglossa caffrorum (Less.) Grau (unaccepted)
  » Species Aster calderi B.Boivin accepted as Symphyotrichum puniceum var. puniceum (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster calendulaceus (Griseb.) Kuntze accepted as Noticastrum acuminatum (DC.) Cuatrec. (unaccepted)
  » Species Aster californicus (Nutt.) Kuntze accepted as Solidago velutina subsp. californica (Nutt.) Semple (unaccepted)
  » Species Aster californicus Less. accepted as Erigeron glaucus Ker Gawl. (unaccepted)
  » Species Aster calvatus (Baker) Herter accepted as Noticastrum calvatum (Baker) Cuatrec. (unaccepted)
  » Species Aster campestris Nutt. accepted as Symphyotrichum campestre (Nutt.) G.L.Nesom (unaccepted)
  » Species Aster camporum Gardner accepted as Inulopsis camporum (Gardner) G.L.Nesom (unaccepted)
  » Species Aster camptosorus Small accepted as Symphyotrichum shortii (Lindl.) G.L.Nesom (unaccepted)
  » Species Aster canadensis (L.) E.H.L.Krause accepted as Erigeron canadensis L. (unaccepted)
  » Species Aster canadensis (L.) Kuntze accepted as Solidago canadensis L. (unaccepted)
  » Species Aster canbyi (A.Gray) Vasey ex Rydb. accepted as Symphyotrichum foliaceum var. canbyi (A.Gray) G.L.Nesom (unaccepted)
  » Species Aster canbyi Vasey ex A.Gray accepted as Symphyotrichum foliaceum (Lindl. ex DC.) G.L.Nesom (unaccepted)
  » Species Aster canbyi Kuntze accepted as Pyrrocoma integrifolia (Porter ex A.Gray) Greene (unaccepted)
  » Species Aster candollei Harv. accepted as Felicia cymbalarioides (DC.) Grau (unaccepted)
  » Species Aster candollei Kuntze accepted as Solidago spathulata DC. (unaccepted)
  » Species Aster canescens Pursh accepted as Dieteria canescens (Pursh) Nutt. (unaccepted)
  » Species Aster canescens (Nees) Fisjun accepted as Kalimeris altaica (Willd.) Nees ex Fisch.Mey. & Avé-Lall. (unaccepted)
  » Species Aster cantonensis (Lour.) Courtois accepted as Aster indicus L. (unaccepted)
  » Species Aster canus Waldst. & Kit. accepted as Galatella cana (Waldst. & Kit.) Nees (unaccepted)
    » Subspecies Aster canus subsp. canus accepted as Aster canus Waldst. & Kit.
    » Subspecies Aster canus subsp. punctatus (Waldst. & Kit.) Soó accepted as Galatella sedifolia (L.) Greuter
    » Subspecies Aster canus subsp. rossicus (Novopokr.) Soó (uncertain > unassessed)
  » Species Aster capensis Less. accepted as Felicia aethiopica (Burm.f.) Bolus & Wolley-Dod ex Adamson & T.M.Salt (unaccepted)
  » Species Aster capillaceus E.S.Burgess accepted as Symphyotrichum oolentangiense (Riddell) G.L.Nesom (unaccepted)
  » Species Aster carmesinus E.S.Burgess accepted as Eurybia divaricata (L.) G.L.Nesom (unaccepted)
  » Species Aster carnerosanus S.Watson accepted as Symphyotrichum carnerosanum (S.Watson) G.L.Nesom (unaccepted)
  » Species Aster carneus Torr. & A.Gray accepted as Symphyotrichum puniceum (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster carneus Nees accepted as Symphyotrichum novi-belgii var. novi-belgii (L.) (unaccepted)
    » Variety Aster carneus var. carneus Nees accepted as Aster carneus Nees
    » Variety Aster carneus var. subasper (Lindl.) Torr. & A.Gray (uncertain > unassessed)
  » Species Aster carneus Baker accepted as Symphyotrichum lanceolatum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster carnosus Gilib. accepted as Tripolium pannonicum subsp. tripolium (L.) Greuter (unaccepted)
  » Species Aster carnosus (A.Gray) A.Gray ex Hemsl. accepted as Machaeranthera carnosa (A.Gray) G.L.Nesom (unaccepted)
  » Species Aster carolinianus Walter accepted as Ampelaster carolinianus (Walter) G.L.Nesom (unaccepted)
  » Species Aster carthamodes (Hook.) Kuntze accepted as Pyrrocoma carthamoides var. carthamoides Hook. (unaccepted)
  » Species Aster caryophyllus Steud. accepted as Olearia argophylla (Labill.) F.Muell. ex Benth. (unaccepted)
  » Species Aster cassiniae F.Muell. accepted as Olearia cassiniae (F.Muell.) Benth. (unaccepted)
  » Species Aster castaneus E.S.Burgess accepted as Eurybia divaricata (L.) G.L.Nesom (unaccepted)
  » Species Aster catalaunicus Willk. & Costa accepted as Aster willkommii subsp. catalaunicus (Willk. & Costa) A.Bolòs (unaccepted)
  » Species Aster caubulicus Hook. accepted as Aster albescens (DC.) Wall. ex Hand.-Mazz. (unaccepted)
  » Species Aster caucasicus Willd. accepted as Kemulariella caucasica (Willd.) Tamansch. (unaccepted)
  » Species Aster celmisia F.Muell. accepted as Celmisia longifolia Cass. (unaccepted)
  » Species Aster centaurodes (DC.) Kuntze accepted as Pteronia centauroides DC. (unaccepted)
  » Species Aster cerberoanus (J.Rémy) Kuntze accepted as Haplopappus cerberoanus (J.Rémy) Reiche (unaccepted)
  » Species Aster chamaedrifolius Lam. ex DC. accepted as Printzia polifolia (L.) Hutch. (unaccepted)
  » Species Aster chamissonis A.Gray accepted as Symphyotrichum chilense (Nees) G.L.Nesom (unaccepted)
  » Species Aster chapmanii Torr. & A.Gray accepted as Symphyotrichum chapmanii (Torr. & A.Gray) Semple & Brouillet (unaccepted)
  » Species Aster charieis Less. accepted as Felicia ovata (Thunb.) Compton (unaccepted)
  » Species Aster chebataroffii Herter accepted as Noticastrum chebataroffii (Herter) Zardini (unaccepted)
  » Species Aster chezuensis (Kitam.) Nakai accepted as Heteropappus chejuensis Kitam. (unaccepted)
  » Species Aster chilensis Nees accepted as Symphyotrichum chilense (Nees) G.L.Nesom (unaccepted)
    » Subspecies Aster chilensis subsp. adscendens (Lindl. ex DC.) Cronquist accepted as Symphyotrichum ascendens (Lindl.) G.L.Nesom
    » Subspecies Aster chilensis subsp. chilensis accepted as Aster chilensis Nees
    » Subspecies Aster chilensis subsp. hallii (A.Gray) Cronquist accepted as Symphyotrichum hallii (A.Gray) G.L.Nesom
    » Subspecies Aster chilensis subsp. typicus Cronquist accepted as Symphyotrichum chilense (Nees) G.L.Nesom
    » Variety Aster chilensis var. bernardinus (H.M.Hall) Cronquist accepted as Symphyotrichum defoliatum (Parish) G.L.Nesom
    » Variety Aster chilensis var. chilensis accepted as Aster chilensis Nees
    » Variety Aster chilensis var. euadscendens Cronquist accepted as Symphyotrichum ascendens (Lindl.) G.L.Nesom
    » Variety Aster chilensis var. invenustus (Greene) Jeps. accepted as Symphyotrichum chilense (Nees) G.L.Nesom
    » Variety Aster chilensis var. lentus (Greene) Jeps. accepted as Symphyotrichum lentum (Greene) G.L.Nesom
    » Variety Aster chilensis var. medius Jeps. accepted as Symphyotrichum chilense var. medium (Jeps.) G.L.Nesom
    » Variety Aster chilensis var. sonomensis (Greene) Jeps. accepted as Symphyotrichum lentum (Greene) G.L.Nesom
    » Variety Aster chilensis var. invenustus G.L.Nesom (uncertain > unassessed)
  » Species Aster chinensis L. accepted as Callistephus chinensis (L.) Nees (unaccepted)
  » Species Aster chlorolepis E.S.Burgess accepted as Eurybia chlorolepis (E.S.Burgess) G.L.Nesom (unaccepted)
  » Species Aster chrysanthemifolius Hort. ex Steud. accepted as Felicia filifolia (Vent.) Burtt Davy (unaccepted)
  » Species Aster chrysanthemifolius (DC.) Kuntze accepted as Haplopappus chrysanthemifolius (Less.) DC. (unaccepted)
  » Species Aster chrysanthemoides Willd. ex Spreng. accepted as Machaeranthera tanacetifolia (Kunth) Nees (unaccepted)
  » Species Aster chryseus Kuntze accepted as Grindelia prunelloides (Poepp. ex Less.) Adr.Bartoli & Tortosa (unaccepted)
  » Species Aster chrysocomifolius Hort. ex Steud. accepted as Nolletia chrysocomoides (Desf.) Cass. (unaccepted)
  » Species Aster chrysocomoides Desf. accepted as Nolletia chrysocomoides (Desf.) Cass. (unaccepted)
  » Species Aster chrysocomoides Turcz. ex DC. accepted as Aster alpinus L. (unaccepted)
  » Species Aster chrysogonii Sennen accepted as Symphyotrichum pilosum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster chrysophyllus A.Cunn. ex DC. accepted as Olearia chrysophylla (DC.) Benth. (unaccepted)
  » Species Aster chrysothamnus Kuntze accepted as Ericameria arborescens (A.Gray) Greene (unaccepted)
  » Species Aster cichoriaceus (Greene) S.F.Blake accepted as Dieteria canescens var. aristata (Eastw.) D.R.Morgan & R.L.Hartm. (unaccepted)
  » Species Aster ciliaris Kuntze accepted as Solidago juncea Aiton (unaccepted)
  » Species Aster ciliaris Thunb. ex DC. accepted as Zyrphelis taxifolia (L.) Nees (unaccepted)
  » Species Aster ciliatus (Nutt.) Kuntze accepted as Grindelia ciliata (Nutt.) Spreng. (unaccepted)
  » Species Aster ciliatus (Ledeb.) B.Fedtsch. accepted as Symphyotrichum ciliatum (Ledeb.) G.L.Nesom (unaccepted)
  » Species Aster ciliatus Nutt. accepted as Symphyotrichum pratense (Raf.) G.L.Nesom (unaccepted)
  » Species Aster ciliatus Muhl. ex Willd. accepted as Symphyotrichum ericoides var. ericoides (L.) G.L.Nesom (unaccepted)
  » Species Aster ciliolatus Lindl. accepted as Symphyotrichum ciliolatum (Lindl.) Á.Löve & D.Löve (unaccepted)
    » Forma Aster ciliolatus f. ciliolatus accepted as Aster ciliolatus Lindl.
    » Forma Aster ciliolatus f. comatus (Fernald) Fernald accepted as Symphyotrichum ciliolatum (Lindl.) Á.Löve & D.Löve
    » Variety Aster ciliolatus var. borealis (J.Rousseau) Dutilly & Lepage accepted as Symphyotrichum ciliolatum (Lindl.) Á.Löve & D.Löve
    » Variety Aster ciliolatus var. ciliolatus accepted as Aster ciliolatus Lindl.
    » Variety Aster ciliolatus var. comatus (Fernald) A.G.Jones accepted as Symphyotrichum ciliolatum (Lindl.) Á.Löve & D.Löve
    » Variety Aster ciliolatus var. maccallae (Rydb.) A.G.Jones accepted as Symphyotrichum subspicatum (Nees) G.L.Nesom
    » Forma Aster ciliolatus f. comatus (Fernald) G.L.Nesom (uncertain > unassessed)
    » Variety Aster ciliolatus var. maccallae (Rydb.) G.L.Nesom (uncertain > unassessed)
    » Variety Aster ciliolatus var. wilsonii (Rydb.) G.L.Nesom (uncertain > unassessed)
    » Variety Aster ciliolatus var. wilsonii (Rydb.) A.G.Jones (uncertain > unassessed)
  » Species Aster ciliosus Kitam. accepted as Aster hayatae H.Lév. & Vaniot (unaccepted)
  » Species Aster ciliosus (Turcz.) Hand.-Mazz. accepted as Aster asa-grayi Makino (unaccepted)
  » Species Aster cinereus Korsh. accepted as Galatella villosa (L.) Rchb.f. (unaccepted)
  » Species Aster claviger E.S.Burgess accepted as Symphyotrichum undulatum (L.) G.L.Nesom (unaccepted)
  » Species Aster claytonii E.S.Burgess accepted as Eurybia divaricata (L.) G.L.Nesom (unaccepted)
  » Species Aster coerulescens DC. accepted as Symphyotrichum praealtum var. praealtum (Poir.) G.L.Nesom (unaccepted)
  » Species Aster cognatus H.M.Hall accepted as Xylorhiza cognata (H.M.Hall) T.J.Watson (unaccepted)
  » Species Aster colchicus Albov accepted as Kemulariella colchica (Albov) Tamamsch. (unaccepted)
  » Species Aster colensoi (Hook.f.) F.Muell. accepted as Olearia colensoi Hook.f. (unaccepted)
  » Species Aster collinsii Nutt. accepted as Sericocarpus tortifolius (Michx.) Nees (unaccepted)
  » Species Aster collinus Salisb. accepted as Aster amellus L. (unaccepted)
  » Species Aster coloradoensis A.Gray accepted as Xanthisma coloradoense (A.Gray) D.R.Morgan & R.L.Hartm. (unaccepted)
  » Species Aster coloratus (Colenso) Kuntze accepted as Olearia rani (A.Cunn.) Druce (unaccepted)
  » Species Aster columbianus Piper accepted as Symphyotrichum ×columbianum (Piper) G.L.Nesom (unaccepted)
  » Species Aster commixtus (Nees) Kuntze accepted as Eurybia spectabilis (Sol. ex Aiton) G.L.Nesom (unaccepted)
  » Species Aster commutatus Kuntze accepted as Solidago odora subsp. chapmanii (A.Gray) Semple (unaccepted)
  » Species Aster commutatus (Torr. & A.Gray) A.Gray accepted as Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom (unaccepted)
    » Subspecies Aster commutatus subsp. commutatus accepted as Aster commutatus (Torr. & A.Gray) A.Gray
    » Subspecies Aster commutatus subsp. crassulus (Rydb.) S.F.Blake accepted as Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom
    » Subspecies Aster commutatus subsp. polycephalus (Rydb.) S.F.Blake accepted as Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom
    » Variety Aster commutatus var. commutatus accepted as Aster commutatus (Torr. & A.Gray) A.Gray
    » Variety Aster commutatus var. crassulus (Rydb.) S.F.Blake accepted as Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom
    » Variety Aster commutatus var. polycephalus (Rydb.) S.F.Blake accepted as Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom
  » Species Aster concinnus Salisb. accepted as Felicia fruticosa (L.) G.Nicholson (unaccepted)
  » Species Aster concinnus Colla accepted as Symphyotrichum novae-angliae (L.) G.L.Nesom (unaccepted)
  » Species Aster concinnus Willd. accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster concolor L. accepted as Symphyotrichum concolor (L.) G.L.Nesom (unaccepted)
  » Species Aster conduplicatus E.S.Burgess accepted as Symphyotrichum puniceum var. puniceum (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster confertiflorus (DC.) Kuntze accepted as Solidago simplex var. simplex (unaccepted)
  » Species Aster confertus Desf. accepted as Symphyotrichum puniceum (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster confertus Nees accepted as Symphyotrichum versicolor (Willd.) G.L.Nesom (unaccepted)
  » Species Aster confinis (A.Gray) Kuntze accepted as Solidago confinis A.Gray (unaccepted)
  » Species Aster confusus Harv. accepted as Felicia hirsuta DC. (unaccepted)
  » Species Aster conocephalus (F.Muell.) F.Muell. accepted as Cratystylis conocephala (F.Muell.) S.Moore (unaccepted)
  » Species Aster consanguineus Ledeb. accepted as Erigeron komarovii Botsch. (unaccepted)
  » Species Aster conspicuus Fisch. ex Turcz. accepted as Eurybia sibirica (L.) G.L.Nesom (unaccepted)
  » Species Aster conspicuus Lindl. accepted as Eurybia conspicua (Lindl.) G.L.Nesom (unaccepted)
  » Species Aster continuus Small accepted as Symphyotrichum patens var. patentissimum (Lindl. ex Lindl.) G.L.Nesom (unaccepted)
  » Species Aster conyzae Griess. accepted as Inula conyza (Griess.) DC. (unaccepted)
  » Species Aster conyzoides Willd. accepted as Sericocarpus conyzoides Nees (unaccepted)
  » Species Aster conyzoides Desf. accepted as Felicia hyssopifolia subsp. glabra (DC.) Grau (unaccepted)
  » Species Aster cooperi (A.Gray) Kuntze accepted as Ericameria cooperi (A.Gray) H.M.Hall (unaccepted)
  » Species Aster cordalenus L.F.Hend. accepted as Symphyotrichum eatonii (A.Gray) G.L.Nesom (unaccepted)
  » Species Aster cordifolius L. accepted as Symphyotrichum cordifolium (L.) G.L.Nesom (unaccepted)
    » Subspecies Aster cordifolius subsp. cordifolius accepted as Aster cordifolius L.
    » Subspecies Aster cordifolius subsp. laevigatus (Porter) A.G.Jones accepted as Symphyotrichum cordifolium (L.) G.L.Nesom
    » Subspecies Aster cordifolius subsp. sagittifolius (Wedem. ex Willd.) A.G.Jones accepted as Symphyotrichum cordifolium (L.) G.L.Nesom
    » Variety Aster cordifolius var. alvearius E.S.Burgess accepted as Symphyotrichum cordifolium (L.) G.L.Nesom
    » Variety Aster cordifolius var. cordifolius accepted as Aster cordifolius L.
    » Variety Aster cordifolius var. furbishiae Fernald accepted as Symphyotrichum cordifolium (L.) G.L.Nesom
    » Variety Aster cordifolius var. glabratus Hollick & Britton accepted as Symphyotrichum cordifolium (L.) G.L.Nesom
    » Variety Aster cordifolius var. incisus Britton accepted as Symphyotrichum cordifolium (L.) G.L.Nesom
    » Variety Aster cordifolius var. laevigatus Porter accepted as Symphyotrichum cordifolium (L.) G.L.Nesom
    » Variety Aster cordifolius var. lanceolatus Porter accepted as Symphyotrichum cordifolium (L.) G.L.Nesom
    » Variety Aster cordifolius var. moratus (Shinners) Shinners accepted as Symphyotrichum cordifolium (L.) G.L.Nesom
    » Variety Aster cordifolius var. pedicellatus E.S.Burgess accepted as Symphyotrichum cordifolium (L.) G.L.Nesom
    » Variety Aster cordifolius var. polycephalus Porter accepted as Symphyotrichum cordifolium (L.) G.L.Nesom
    » Variety Aster cordifolius var. racemiflorus Fernald accepted as Symphyotrichum cordifolium (L.) G.L.Nesom
    » Variety Aster cordifolius var. sagittifolius (Wedem. ex Willd.) A.G.Jones accepted as Symphyotrichum cordifolium (L.) G.L.Nesom
  » Species Aster cordineri A.Nelson accepted as Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom (unaccepted)
  » Species Aster coriaceifolius H.Lév. & Vaniot accepted as Acilepis clivorum (Hance) H.Rob. (unaccepted)
  » Species Aster coriaceiformis H.Lév. & Vaniot accepted as Acilepis clivorum (Hance) H.Rob. (unaccepted)
  » Species Aster coriaceus Hort. ex DC. accepted as Felicia fruticosa (L.) G.Nicholson (unaccepted)
  » Species Aster coriaceus G.Forst. accepted as Celmisia coriacea (G.Forst.) Hook.f. (unaccepted)
  » Species Aster coridifolius Michx. accepted as Symphyotrichum dumosum var. dumosum (L.) G.L.Nesom (unaccepted)
  » Species Aster cornifolius Muhl. ex Willd. accepted as Doellingeria infirma (Michx.) Greene (unaccepted)
  » Species Aster cornuti Wendl. ex Nees accepted as Symphyotrichum lanceolatum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster cornuti Mill. ex DC. accepted as Symphyotrichum lanceolatum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster coronatus (Sch.Bip.) S.Y.Hu accepted as Kalimeris coronata Sch.Bip. (unaccepted)
  » Species Aster coronopifolia (Nutt.) N.E.Br. accepted as Machaeranthera tanacetifolia (Kunth) Nees (unaccepted)
  » Species Aster coronopifolius (A.Gray) Kuntze accepted as Isocoma coronopifolia (A.Gray) Greene (unaccepted)
  » Species Aster corrigiatus E.S.Burgess accepted as Symphyotrichum undulatum (L.) G.L.Nesom (unaccepted)
  » Species Aster corymbosus Moench accepted as Inula germanica L. (unaccepted)
  » Species Aster corymbosus Sol. ex Aiton accepted as Eurybia divaricata (L.) G.L.Nesom (unaccepted)
  » Species Aster corymbosus (Harv.) Fourc. accepted as Gymnostephium papposum G.L.Nesom (unaccepted)
  » Species Aster costei H.Lév. accepted as Aster asteroides subsp. costei (H.Lév.) Grierson (unaccepted)
  » Species Aster covillei (Greene) S.F.Blake ex M.Peck accepted as Eucephalus ledophyllus var. covillei (Greene) G.L.Nesom (unaccepted)
  » Species Aster crassifolius Klatt accepted as Diplostephium phylicoides (Kunth) Wedd. (unaccepted)
  » Species Aster crassulus Rydb. accepted as Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom (unaccepted)
  » Species Aster crenatifolius Hand.-Mazz. accepted as Heteropappus crenatifolius (Hand.-Mazz.) Grierson (unaccepted)
    » Variety Aster crenatifolius var. crenatifolius accepted as Aster crenatifolius Hand.-Mazz.
    » Variety Aster crenatifolius var. subracemosus Hand.-Mazz. (uncertain > unassessed)
  » Species Aster crenatus (Thunb.) Less. accepted as Mairia crenata (Thunb.) Nees (unaccepted)
  » Species Aster crenifolius (Fernald) Cronquist accepted as Symphyotrichum novi-belgii var. crenifolium (Fernald) Labrecque & Brouillet (unaccepted)
  » Species Aster crenulatus Hutch. accepted as Felicia boehmii O.Hoffm. (unaccepted)
  » Species Aster creticus (Gand.) Rech.f. accepted as Galatella cretica Gand. (unaccepted)
  » Species Aster crinifer (Hook.f.) F.Muell. accepted as Pleurophyllum criniferum Hook.f. (unaccepted)
  » Species Aster crinitus L. accepted as Athrixia crinita (L.) Druce (unaccepted)
  » Species Aster crinitus Thunb. accepted as Athrixia capensis Ker Gawl. (unaccepted)
  » Species Aster crispus Forssk. accepted as Pulicaria undulata (L.) C.A.Mey. (unaccepted)
  » Species Aster crithmifolius (L.) Cav. accepted as Inula crithmifolia L. (unaccepted)
  » Species Aster crocatus Bertol. accepted as Lycoseris crocata (Bertol.) S.F.Blake (unaccepted)
  » Species Aster croceus (A.Gray) Kuntze accepted as Pyrrocoma crocea (A.Gray) Greene (unaccepted)
  » Species Aster crocifolius Kunth accepted as Oritrophium crocifolium (Kunth) Cuatrec. (unaccepted)
  » Species Aster culminis A.Nelson accepted as Aster alpinus subsp. vierhapperi Onno (unaccepted)
  » Species Aster cuneatus A.Cunn. ex Steud. accepted as Olearia stellulata (Labill.) DC. (unaccepted)
  » Species Aster cuneatus (A.Gray) Kuntze accepted as Ericameria cuneata (A.Gray) McClatchie (unaccepted)
  » Species Aster cuneifolius (Nutt.) Kuntze accepted as Haplopappus scrobiculatus (Nees) DC. (unaccepted)
  » Species Aster cunninghamii (Hook.f.) F.Muell. accepted as Olearia rani (A.Cunn.) Druce (unaccepted)
  » Species Aster curtisii Torr. & A.Gray accepted as Symphyotrichum retroflexum G.L.Nesom (unaccepted)
  » Species Aster curtus Cronquist accepted as Sericocarpus rigidus Lindl. (unaccepted)
  » Species Aster cusickii A.Gray accepted as Symphyotrichum cusickii (A.Gray) G.L.Nesom (unaccepted)
  » Species Aster cyaneus Hoffm. accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster cyanodiscus F.Muell. accepted as Olearia ramosissima (DC.) Benth. (unaccepted)
  » Species Aster cydoniifolius A.Cunn. ex DC. accepted as Olearia cydoniifolia (DC.) Benth. (unaccepted)
  » Species Aster cylleneus (Boiss. & Orph.) Halácsy accepted as Aster alpinus subsp. cylleneus (Boiss. & Orph.) Hayek (unaccepted)
  » Species Aster cylleneus Orphan. ex Nyman accepted as Aster alpinus L. (unaccepted)
  » Species Aster cymbalariae Aiton accepted as Felicia cymbalariae subsp. cymbalariae (Aiton) Bolus & Wolley-Dod ex Adamson & T.M.Salter (unaccepted)
  » Species Aster cymbalariodes (DC.) Kuntze accepted as Felicia cymbalarioides (DC.) Grau (unaccepted)
  » Species Aster dahuricus (DC.) Benth. ex Baker accepted as Galatella dahurica DC. (unaccepted)
  » Species Aster dahuricus (DC.) B.Fedtsch. accepted as Galatella dahurica DC. (unaccepted)
  » Species Aster daltonis F.Muell. accepted as Celmisia glandulosa Hook.f. (unaccepted)
  » Species Aster debilis Bojer ex DC. accepted as Athrixia debilis DC. (unaccepted)
  » Species Aster decemflora Nutt. accepted as Solidago radula Nutt. (unaccepted)
  » Species Aster decemflorus Kuntze accepted as Solidago radula Nutt. (unaccepted)
  » Species Aster decorus Desf. ex DC. accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster decumbens Baker accepted as Noticastrum decumbens (Baker) Cuatrec. (unaccepted)
  » Species Aster decurrens Moench accepted as Inula bifrons L. (unaccepted)
  » Species Aster decurrens (DC.) F.Muell. accepted as Eurybia decurrens DC. (unaccepted)
  » Species Aster decurrens A.Cunn. ex DC. accepted as Olearia decurrens (DC.) Benth. (unaccepted)
  » Species Aster deflexus Moench accepted as Galatella sedifolia (L.) Greuter (unaccepted)
  » Species Aster defoliatus Parish accepted as Symphyotrichum defoliatum (Parish) G.L.Nesom (unaccepted)
  » Species Aster delavayi Franch. accepted as Aster diplostephioides (DC.) Benth. ex C.B.Clarke (unaccepted)
  » Species Aster delectabilis H.M.Hall accepted as Symphyotrichum spathulatum var. spathulatum (Lindl.) G.L.Nesom (unaccepted)
  » Species Aster densiflorus (Hook.f.) F.Muell. accepted as Celmisia densiflora Hook.f. (unaccepted)
  » Species Aster densifolius (J.Rémy) Kuntze accepted as Haplopappus scrobiculatus (Nees) DC. (unaccepted)
  » Species Aster dentatus Andrews accepted as Olearia tomentosa (Wendl.) DC. (unaccepted)
  » Species Aster dentatus Thunb. accepted as Felicia australis (Alston) E.Phillips (unaccepted)
  » Species Aster denticulatus (Phil.) Kuntze accepted as Haplopappus cerberoanus (J.Rémy) Reiche (unaccepted)
  » Species Aster denudatus Nutt. accepted as Symphyotrichum ascendens (Lindl.) G.L.Nesom (unaccepted)
  » Species Aster depauperatus Fernald accepted as Symphyotrichum depauperatum (Fernald) G.L.Nesom (unaccepted)
  » Species Aster depauperatus H.Lév. & Vaniot accepted as Aster uchiyamae Nakai (unaccepted)
  » Species Aster depressus (A.Gray) Kuntze accepted as Chrysothamnus depressus Nutt. (unaccepted)
  » Species Aster depressus Kit. accepted as Tripolium pannonicum subsp. tripolium (L.) Greuter (unaccepted)
  » Species Aster deserticola J.F.Macbr. accepted as Symphyotrichum defoliatum (Parish) G.L.Nesom (unaccepted)
  » Species Aster desertorum Tchertk. accepted as Galatella sedifolia subsp. dracunculoides (Lam.) Greuter (unaccepted)
  » Species Aster diabolicus Piper accepted as Symphyotrichum foliaceum var. parryi (D.C.Eaton) G.L.Nesom (unaccepted)
  » Species Aster dichotomus Elliott accepted as Oclemena reticulata (Pursh) G.L.Nesom (unaccepted)
  » Species Aster dieteria Kuntze accepted as Xanthisma gracile (Nutt.) D.R.Morgan & R.L.Hartm. (unaccepted)
  » Species Aster diffusus Aiton accepted as Symphyotrichum lateriflorum (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster diplopappus (J.Rémy) Kuntze accepted as Haplopappus diplopappus J.Rémy (unaccepted)
  » Species Aster discoideus Boiss. & Reut. accepted as Aster willkommii subsp. discoideus (Willk.) A.Bolòs (unaccepted)
  » Species Aster discoideus Sond. accepted as Chrysocoma ciliata L. (unaccepted)
  » Species Aster discoideus Elliott accepted as Brintonia discoidea (Elliott) Greene (unaccepted)
  » Species Aster discoideus Sond. ex Harv. & Sand. accepted as Chrysocoma ciliata L. (unaccepted)
  » Species Aster distortus Turcz. ex Avé-Lall. accepted as Kalimeris altaica (Willd.) Nees ex Fisch.Mey. & Avé-Lall. (unaccepted)
  » Species Aster divaricatus (M.Bieb.) Schmalh. accepted as Galatella divaricata (Fisch. ex M.Bieb.) Novopokr. (unaccepted)
  » Species Aster divaricatus L. accepted as Eurybia divaricata (L.) G.L.Nesom (unaccepted)
    » Variety Aster divaricatus var. alatus (W.P.C.Barton) E.S.Burgess accepted as Symphyotrichum subulatum var. ligulatum (Shinners) S.D.Sundb.
    » Variety Aster divaricatus var. chlorolepis (E.S.Burgess) H.E.Ahles accepted as Eurybia chlorolepis (E.S.Burgess) G.L.Nesom
    » Variety Aster divaricatus var. curtifolius E.S.Burgess accepted as Symphyotrichum subulatum var. ligulatum (Shinners) S.D.Sundb.
    » Variety Aster divaricatus var. cymulosus E.S.Burgess accepted as Symphyotrichum subulatum var. ligulatum (Shinners) S.D.Sundb.
    » Variety Aster divaricatus var. deltoideus E.S.Burgess accepted as Symphyotrichum subulatum var. ligulatum (Shinners) S.D.Sundb.
    » Variety Aster divaricatus var. fontinalis E.S.Burgess accepted as Symphyotrichum subulatum var. ligulatum (Shinners) S.D.Sundb.
    » Variety Aster divaricatus var. graminifolius (Spreng.) Baker accepted as Symphyotrichum graminifolium (Spreng.) G.L.Nesom
    » Variety Aster divaricatus var. persaliens E.S.Burgess accepted as Symphyotrichum subulatum var. ligulatum (Shinners) S.D.Sundb.
    » Variety Aster divaricatus var. sandwicensis accepted as Symphyotrichum subulatum var. parviflorum (Nees) S.D.Sundb.
    » Variety Aster divaricatus var. tenebrosus (E.S.Burgess) R.J.Eaton & Griscom accepted as Symphyotrichum subulatum var. ligulatum (Shinners) S.D.Sundb.
  » Species Aster divaricatus Baker accepted as Aster squamatus (Spreng.) Hieron. (unaccepted)
  » Species Aster divaricatus (Nutt.) Kuntze accepted as Croptilon divaricatum (Nutt.) Raf. (unaccepted)
  » Species Aster divaricatus (Nutt.) Torr. & A.Gray accepted as Symphyotrichum subulatum var. ligulatum (Shinners) S.D.Sundb. (unaccepted)
  » Species Aster divergens Dryand. ex Aiton accepted as Symphyotrichum lateriflorum (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster diversifolius Michx. accepted as Symphyotrichum undulatum (L.) G.L.Nesom (unaccepted)
  » Species Aster doellianus (Phil.) Kuntze accepted as Haplopappus rigidus Phil. (unaccepted)
  » Species Aster douglasii Lindl. accepted as Symphyotrichum subspicatum (Nees) G.L.Nesom (unaccepted)
  » Species Aster douglasii D.C.Eaton accepted as Symphyotrichum foliaceum (Lindl. ex DC.) G.L.Nesom (unaccepted)
  » Species Aster dracunculoides Willd. accepted as Symphyotrichum lanceolatum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster dracunculoides Lam. accepted as Galatella sedifolia subsp. dracunculoides (Lam.) Greuter (unaccepted)
  » Species Aster dregei (DC.) Harv. accepted as Felicia dregei DC. (unaccepted)
  » Species Aster drummondii Lindl. ex Hook. accepted as Symphyotrichum drummondii (Lindl.) G.L.Nesom (unaccepted)
  » Species Aster drummondii Lindl. accepted as Symphyotrichum drummondii (Lindl.) G.L.Nesom (unaccepted)
    » Subspecies Aster drummondii subsp. drummondii accepted as Aster drummondii Lindl.
    » Subspecies Aster drummondii subsp. parviceps (Shinners) A.G.Jones accepted as Symphyotrichum drummondii var. texanum (E.S.Burgess) G.L.Nesom
    » Subspecies Aster drummondii subsp. texanus (E.S.Burgess) A.G.Jones accepted as Symphyotrichum drummondii var. texanum (E.S.Burgess) G.L.Nesom
    » Variety Aster drummondii var. drummondii accepted as Aster drummondii Lindl.
    » Variety Aster drummondii var. parviceps (Shinners) A.G.Jones accepted as Symphyotrichum drummondii var. texanum (E.S.Burgess) G.L.Nesom
    » Variety Aster drummondii var. texanus (E.S.Burgess) A.G.Jones accepted as Symphyotrichum drummondii var. texanum (E.S.Burgess) G.L.Nesom
    » Subspecies Aster drummondii subsp. parviceps (Shinners) G.L.Nesom (uncertain > unassessed)
    » Variety Aster drummondii var. rhodactis Benke (uncertain > unassessed)
  » Species Aster dubius (Thunb.) Onno ex Kitam. accepted as Erigeron thunbergii A.Gray (unaccepted)
  » Species Aster dubius (Thunb.) Onno accepted as Erigeron thunbergii A.Gray (unaccepted)
  » Species Aster dubius (Thunb.) Hultén accepted as Erigeron thunbergii A.Gray (unaccepted)
    » Forma Aster dubius f. dubius (Thunb.) Hultén accepted as Aster dubius (Thunb.) Hultén
    » Variety Aster dubius var. dubius (Thunb.) Hultén accepted as Aster dubius (Thunb.) Hultén
    » Forma Aster dubius f. albus (Nakai) T.Shimizu (uncertain > unassessed)
    » Variety Aster dubius var. glabratus (A.Gray) T.Shimizu (uncertain > unassessed)
  » Species Aster dumosus L. accepted as Symphyotrichum dumosum (L.) G.L.Nesom (unaccepted)
    » Variety Aster dumosus var. coridifolius (Michx.) Torr. & A.Gray accepted as Symphyotrichum dumosum var. dumosum (L.) G.L.Nesom
    » Variety Aster dumosus var. dodgei Fernald accepted as Symphyotrichum dumosum var. strictior (Torr. & A.Gray) G.L.Nesom
    » Variety Aster dumosus var. dumosus accepted as Aster dumosus L.
    » Variety Aster dumosus var. foliosus Alph.Wood accepted as Symphyotrichum dumosum (L.) G.L.Nesom
    » Variety Aster dumosus var. gracilentus Torr. & A.Gray accepted as Symphyotrichum dumosum var. dumosum (L.) G.L.Nesom
    » Variety Aster dumosus var. gracilipes Wiegand accepted as Symphyotrichum dumosum var. gracilipes (Wiegand) G.L.Nesom
    » Variety Aster dumosus var. pergracilis Wiegand accepted as Symphyotrichum dumosum var. pergracile (Wiegand) G.L.Nesom
    » Variety Aster dumosus var. strictior Torr. & A.Gray accepted as Symphyotrichum dumosum var. strictior (Torr. & A.Gray) G.L.Nesom
    » Variety Aster dumosus var. subracemosus Torr. & A.Gray accepted as Symphyotrichum dumosum (L.) G.L.Nesom
    » Variety Aster dumosus var. versus Torr. & A.Gray accepted as Symphyotrichum dumosum (L.) G.L.Nesom
    » Variety Aster dumosus var. violaceus Pursh accepted as Symphyotrichum dumosum (L.) G.L.Nesom
    » Variety Aster dumosus var. subulifolius Torr. & A.Gray (uncertain > unassessed)
    » Variety Aster dumosus var. verus Torr. & A.Gray (uncertain > unassessed)
  » Species Aster durandii Nutt. ex Durand accepted as Symphyotrichum defoliatum (Parish) G.L.Nesom (unaccepted)
  » Species Aster durandii Kuntze accepted as Ericameria teretifolia (Durand & Hilg.) Jeps. (unaccepted)
  » Species Aster durus Lunell accepted as Symphyotrichum lanceolatum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster dysentericus (L.) Scop. accepted as Pulicaria dysenterica (L.) Bernh. (unaccepted)
  » Species Aster eatonii (A.Gray) Howell accepted as Symphyotrichum eatonii (A.Gray) G.L.Nesom (unaccepted)
  » Species Aster echinatus (Thunb.) Less. accepted as Felicia echinata (Thunb.) Nees (unaccepted)
  » Species Aster ecklonis Less. accepted as Felicia aethiopica subsp. ecklonis (Less.) Grau (unaccepted)
  » Species Aster edwardii Kuntze accepted as Ericameria nauseosa var. juncea (Greene) G.L.Nesom & G.I.Baird (unaccepted)
  » Species Aster elaeagnifolius A.Cunn. ex DC. accepted as Olearia furfuracea (A.Rich.) Hook.f. (unaccepted)
  » Species Aster elaeophilus A.Cunn. ex DC. accepted as Olearia heterophila (unaccepted)
  » Species Aster elaeophilus (DC.) F.Muell. accepted as Olearia heterophila (unaccepted)
  » Species Aster elatus (Greene) Cronquist accepted as Oreostemma elatum (Greene) Greene (unaccepted)
  » Species Aster elatus Bertero ex Steud. accepted as Eurybia divaricata (L.) G.L.Nesom (unaccepted)
  » Species Aster elegans Hook.f. & Thomson ex C.B.Clarke accepted as Aster neoelegans Grierson (unaccepted)
  » Species Aster elegans Nees accepted as Aster amellus L. (unaccepted)
  » Species Aster elegans Willd. accepted as Eurybia spectabilis (Sol. ex Aiton) G.L.Nesom (unaccepted)
  » Species Aster elegans (Nutt.) Torr. & A.Gray accepted as Eucephalus elegans Nutt. (unaccepted)
  » Species Aster elegantulus A.E.Porsild accepted as Symphyotrichum falcatum var. falcatum (Lindl.) G.L.Nesom (unaccepted)
  » Species Aster eliasii A.Nelson accepted as Eurybia radulina (A.Gray) G.L.Nesom (unaccepted)
  » Species Aster elliottii Torr. & A.Gray accepted as Symphyotrichum elliottii (Torr. & A.Gray) G.L.Nesom (unaccepted)
  » Species Aster ellipticus A.Cunn. ex DC. accepted as Olearia elliptica DC. (unaccepted)
  » Species Aster elmeri Piper accepted as Aster okanoganus Piper (unaccepted)
  » Species Aster elmeri Greene accepted as Erigeron elmeri (Greene) Greene (unaccepted)
  » Species Aster elodes Torr. & A.Gray accepted as Symphyotrichum novi-belgii var. elodes (Torr. & A.Gray) G.L.Nesom (unaccepted)
  » Species Aster elongatus Thunb. accepted as Felicia elongata (Thunb.) O.Hoffm. ex O.Hoffm. (unaccepted)
  » Species Aster elongatus (Nutt.) Kuntze accepted as Solidago elongata Nutt. (unaccepted)
  » Species Aster elongifolius A.Cunn. accepted as Olearia furfuracea (A.Rich.) Hook.f. (unaccepted)
  » Species Aster eminens Willd. accepted as Symphyotrichum novi-belgii (L.) G.L.Nesom (unaccepted)
  » Species Aster engelmannii (D.C.Eaton) A.Gray accepted as Eucephalus engelmannii (D.C.Eaton) Greene (unaccepted)
  » Species Aster ensifolius Scop. accepted as Inula ensifolia L. (unaccepted)
  » Species Aster eradiatus (A.Gray) Frye & Rigg accepted as Dieteria canescens var. shastensis (A.Gray) D.R.Morgan & R.L.Hartm. (unaccepted)
  » Species Aster erectus (J.Rémy) Kuntze accepted as Noticastrum erectum J.Rémy (unaccepted)
  » Species Aster erectus (Remy) Reiche accepted as Noticastrum erectum J.Rémy (unaccepted)
  » Species Aster eremophila Bunge accepted as Aster limonifolius (Less.) B.Fedtsch. (unaccepted)
  » Species Aster eremophilus Bunge accepted as Aster limonifolius (Less.) B.Fedtsch. (unaccepted)
  » Species Aster ericifolius Rothr. accepted as Chaetopappa ericoides (Torr.) G.L.Nesom (unaccepted)
    » Variety Aster ericifolius var. ericifolius accepted as Aster ericifolius Rothr.
    » Variety Aster ericifolius var. tenuis A.Gray (uncertain > unassessed)
  » Species Aster ericifolius Forssk. accepted as Macowania ericifolia (Forssk.) B.L.Burtt & Grau (unaccepted)
  » Species Aster ericina Kuntze accepted as Ericameria ericoides (Less.) Nutt. ex Jeps. (unaccepted)
  » Species Aster ericoides L. accepted as Symphyotrichum ericoides (L.) G.L.Nesom (unaccepted)
    » Forma Aster ericoides f. caeruleus (Benke) S.F.Blake accepted as Symphyotrichum ericoides (L.) G.L.Nesom
    » Forma Aster ericoides f. ericoides accepted as Aster ericoides L.
    » Forma Aster ericoides f. exiguus (Fernald) Fernald accepted as Symphyotrichum ericoides (L.) G.L.Nesom
    » Forma Aster ericoides f. gramsii Benke accepted as Symphyotrichum ericoides (L.) G.L.Nesom
    » Forma Aster ericoides f. polycephalus (Rydb.) F.C.Gates accepted as Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom
    » Forma Aster ericoides f. prostratus (Kuntze) Fernald accepted as Symphyotrichum ericoides var. ericoides (L.) G.L.Nesom
    » Forma Aster ericoides f. villosus (Torr. & A.Gray) Voss accepted as Symphyotrichum pilosum (Willd.) G.L.Nesom
    » Subspecies Aster ericoides subsp. ericoides accepted as Aster ericoides L.
    » Subspecies Aster ericoides subsp. pansus (S.F.Blake) A.G.Jones accepted as Symphyotrichum ericoides (L.) G.L.Nesom
    » Variety Aster ericoides var. batesii (Rydb.) F.C.Gates accepted as Symphyotrichum ×batesii (Rydb.) G.L.Nesom
    » Variety Aster ericoides var. commutatus (Torr. & A.Gray) B.Boivin accepted as Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom
    » Variety Aster ericoides var. depauperatus (Fernald) Porter accepted as Symphyotrichum depauperatum (Fernald) G.L.Nesom
    » Variety Aster ericoides var. ericoides accepted as Aster ericoides L.
    » Variety Aster ericoides var. multiflorus (Aiton) Pers. accepted as Symphyotrichum ericoides (L.) G.L.Nesom
    » Variety Aster ericoides var. pansus (S.F.Blake) B.Boivin accepted as Symphyotrichum ericoides (L.) G.L.Nesom
    » Variety Aster ericoides var. parviceps E.S.Burgess accepted as Symphyotrichum parviceps (E.S.Burgess) G.L.Nesom
    » Variety Aster ericoides var. pilosus (Willd.) Porter accepted as Symphyotrichum pilosum (Willd.) G.L.Nesom
    » Variety Aster ericoides var. platyphyllus Torr. & A.Gray accepted as Symphyotrichum pilosum (Willd.) G.L.Nesom
    » Variety Aster ericoides var. pringlei A.Gray accepted as Symphyotrichum pilosum (Willd.) G.L.Nesom
    » Variety Aster ericoides var. prostratus (Kuntze) S.F.Blake accepted as Symphyotrichum ericoides var. ericoides (L.) G.L.Nesom
    » Variety Aster ericoides var. pseudodumosus Thell. accepted as Aster pseudodumosus (Thell.) Bergmans
    » Variety Aster ericoides var. pusillus A.Gray accepted as Symphyotrichum depauperatum (Fernald) G.L.Nesom
    » Variety Aster ericoides var. randi Britton accepted as Symphyotrichum ericoides (L.) G.L.Nesom
    » Variety Aster ericoides var. reevesii A.Gray accepted as Symphyotrichum ericoides (L.) G.L.Nesom
    » Variety Aster ericoides var. stricticaulis (Torr. & A.Gray) F.C.Gates accepted as Symphyotrichum ericoides (L.) G.L.Nesom
    » Variety Aster ericoides var. strictus Porter accepted as Symphyotrichum porteri (A.Gray) G.L.Nesom
    » Variety Aster ericoides var. villosus (Michx.) Torr. & A.Gray accepted as Symphyotrichum pilosum (Willd.) G.L.Nesom
    » Variety Aster ericoides var. parviceps Burgess (uncertain > unassessed)
    » Variety Aster ericoides var. randii Britton (uncertain > unassessed)
    » Variety Aster ericoides var. stricticaulis (Torr. & A.Gray) G.L.Nesom (uncertain > unassessed)
  » Species Aster erigeroides Hook. & Arn. accepted as Erigeron fernandezius (Colla) Harling (unaccepted)
  » Species Aster erigeroides (DC.) Harv. accepted as Felicia erigeroides DC. (unaccepted)
  » Species Aster erigeron E.H.L.Krause accepted as Erigeron acer L. (unaccepted)
  » Species Aster eriophorus (J.Rémy) Kuntze accepted as Noticastrum eriophorum J.Rémy (unaccepted)
  » Species Aster eriophorus (J.Rémy) Reiche accepted as Noticastrum eriophorum J.Rémy (unaccepted)
  » Species Aster erubescens Sieber ex Benth. accepted as Olearia myrsinoides (Labill.) F.Muell. ex Benth. (unaccepted)
  » Species Aster eryngiifolius Torr. & A.Gray accepted as Eurybia eryngiifolia (Torr. & A.Gray) G.L.Nesom (unaccepted)
  » Species Aster espenbergensis Nees accepted as Eurybia sibirica (L.) G.L.Nesom (unaccepted)
  » Species Aster esquirolii H.Lév. accepted as Picris hieracioides subsp. japonica (Thunb.) Krylov (unaccepted)
  » Species Aster eulae Shinners accepted as Symphyotrichum eulae (Shinners) G.L.Nesom (unaccepted)
  » Species Aster euthamia Kuntze accepted as Euthamia caroliniana (L.) Greene ex Porter & Britton (unaccepted)
  » Species Aster exasperatus Link accepted as Olearia ramulosa (Labill.) Benth. (unaccepted)
  » Species Aster excavatus E.S.Burgess accepted as Eurybia divaricata (L.) G.L.Nesom (unaccepted)
  » Species Aster excorticatus (Buchanan) Kuntze accepted as Olearia excorticata Buchanan (unaccepted)
  » Species Aster exiguus (Fernald) Rydb. accepted as Symphyotrichum ericoides var. ericoides (L.) G.L.Nesom (unaccepted)
  » Species Aster exilifolius F.Muell. accepted as Olearia brachyphylla (F.Muell. ex Sond.) N.A.Wakef. (unaccepted)
  » Species Aster exilis Elliott accepted as Symphyotrichum subulatum var. ligulatum (Shinners) S.D.Sundb. (unaccepted)
  » Species Aster expansus Nees accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster exscapus Richardson accepted as Townsendia exscapa (Richardson) Porter (unaccepted)
  » Species Aster exsul Lindl. accepted as Olearia rudis (Benth.) F.Muell. ex Benth. (unaccepted)
  » Species Aster exul Lindl. accepted as Olearia rudis (Benth.) F.Muell. ex Benth. (unaccepted)
  » Species Aster eylesii (S.Moore) Milne-Redh. accepted as Felicia welwitschii (Hiern) Grau (unaccepted)
  » Species Aster falcatus Lindl. accepted as Symphyotrichum falcatum (Lindl. ex Lindl.) G.L.Nesom (unaccepted)
  » Species Aster falcatus Lindl. ex DC. accepted as Symphyotrichum falcatum (Lindl. ex Lindl.) G.L.Nesom (unaccepted)
  » Species Aster falcatus D.C.Eaton accepted as Symphyotrichum ascendens (Lindl.) G.L.Nesom (unaccepted)
  » Species Aster falcidens E.S.Burgess accepted as Symphyotrichum laeve var. laeve (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster fallax Tamamsch. accepted as Aster alpinus L. (unaccepted)
  » Species Aster fascicularis E.Mey. ex DC. accepted as Felicia muricata (Thunb.) Nees (unaccepted)
  » Species Aster fastigiatus Ledeb. accepted as Galatella hauptii (Ledeb.) Lindl. ex Lindl. (unaccepted)
  » Species Aster fauriei H.Lév. & Vaniot accepted as Aster tataricus L.f. (unaccepted)
  » Species Aster fauriei Tamamsch. accepted as Aster tataricus L.f. (unaccepted)
  » Species Aster faxonii Porter accepted as Symphyotrichum pilosum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster feddei H.Lév. & Vaniot accepted as Aster spathulifolius Maxim. (unaccepted)
  » Species Aster fendleri A.Gray accepted as Symphyotrichum fendleri (A.Gray) G.L.Nesom (unaccepted)
  » Species Aster ferdinandi Kuntze accepted as Olearia muricata (Steetz) Benth. (unaccepted)
  » Species Aster ferrugineus accepted as Olearia tomentosa (Wendl.) DC. (unaccepted)
  » Species Aster ferrugineus Edgew. accepted as Aster albescens (DC.) Wall. ex Hand.-Mazz. (unaccepted)
  » Species Aster ficoideus (DC.) Harv. accepted as Poecilolepis ficoidea (DC.) Grau (unaccepted)
  » Species Aster fiebrigii Hieron. accepted as Noticastrum marginatum (Kunth) Cuatrec. (unaccepted > junior subjective synonym, Nom. in sched.)
  » Species Aster filaginifolius Hook. & Arn. accepted as Corethrogyne filaginifolia (Hook. & Arn.) Nutt. (unaccepted)
  » Species Aster filifolius Willd. ex Nees accepted as Felicia muricata (Thunb.) Nees (unaccepted)
  » Species Aster filifolius Vent. accepted as Felicia filifolia subsp. filifolia (Vent.) Burtt Davy (unaccepted)
  » Species Aster filiformis Steud. accepted as Felicia muricata (Thunb.) Nees (unaccepted)
  » Species Aster filiformis Eckl. ex DC. accepted as Zyrphelis taxifolia (L.) Nees (unaccepted)
  » Species Aster finkii Rydb. accepted as Symphyotrichum ×finkii (Rydb.) G.L.Nesom (unaccepted)
  » Species Aster firmus Nees accepted as Symphyotrichum firmum (Nees) G.L.Nesom (unaccepted)
  » Species Aster fischeri Kuntze accepted as Eurybia divaricata (L.) G.L.Nesom (unaccepted)
  » Species Aster fistulosus (Mill.) Kuntze accepted as Solidago fistulosa Mill. (unaccepted)
  » Species Aster flabellum Vaniot accepted as Aster fastigiatus Fisch. (unaccepted)
  » Species Aster flavovirens (Chapm.) Kuntze accepted as Solidago stricta subsp. stricta (unaccepted)
  » Species Aster flexicaulis Raf. accepted as Aster subulatus Michx. (unaccepted)
  » Species Aster flexilis E.S.Burgess accepted as Eurybia divaricata (L.) G.L.Nesom (unaccepted)
  » Species Aster flexuosus (Royle ex DC.) Kuntze accepted as Aster thomsonii C.B.Clarke (unaccepted)
  » Species Aster flexuosus Nutt. accepted as Symphyotrichum tenuifolium (L.) G.L.Nesom (unaccepted)
  » Species Aster flexuosus Fisch. accepted as Aster fischerianus DC. (unaccepted)
  » Species Aster floribundus Willd. accepted as Symphyotrichum novi-belgii (L.) G.L.Nesom (unaccepted)
  » Species Aster florulentus F.Muell. accepted as Olearia floribunda (Hook.f.) Benth. (unaccepted)
  » Species Aster fluvialis Osterh. accepted as Symphyotrichum lanceolatum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster foliaceus Lindl. ex DC. accepted as Symphyotrichum foliaceum (Lindl. ex DC.) G.L.Nesom (unaccepted)
    » Subspecies Aster foliaceus subsp. apricus (A.Gray) Piper accepted as Symphyotrichum foliaceum var. apricum (A.Gray) G.L.Nesom
    » Subspecies Aster foliaceus subsp. foliaceus accepted as Aster foliaceus Lindl. ex DC.
    » Subspecies Aster foliaceus subsp. frondeus (A.Gray) Piper accepted as Symphyotrichum foliaceum var. parryi (D.C.Eaton) G.L.Nesom
    » Variety Aster foliaceus var. apricus A.Gray accepted as Symphyotrichum foliaceum var. apricum (A.Gray) G.L.Nesom
    » Variety Aster foliaceus var. arcuans Fernald accepted as Symphyotrichum novi-belgii var. novi-belgii (L.)
    » Variety Aster foliaceus var. burkei A.Gray accepted as Symphyotrichum foliaceum var. canbyi (A.Gray) G.L.Nesom
    » Variety Aster foliaceus var. canbyi A.Gray accepted as Symphyotrichum foliaceum var. canbyi (A.Gray) G.L.Nesom
    » Variety Aster foliaceus var. crenifolius Fernald accepted as Symphyotrichum novi-belgii var. crenifolium (Fernald) Labrecque & Brouillet
    » Variety Aster foliaceus var. cusickii (A.Gray) Cronquist accepted as Symphyotrichum cusickii (A.Gray) G.L.Nesom
    » Variety Aster foliaceus var. diabolicus (Piper) Onno accepted as Symphyotrichum foliaceum var. parryi (D.C.Eaton) G.L.Nesom
    » Variety Aster foliaceus var. eatonii A.Gray accepted as Symphyotrichum eatonii (A.Gray) G.L.Nesom
    » Variety Aster foliaceus var. foliaceus accepted as Aster foliaceus Lindl. ex DC.
    » Variety Aster foliaceus var. frondeus A.Gray accepted as Symphyotrichum foliaceum var. parryi (D.C.Eaton) G.L.Nesom
    » Variety Aster foliaceus var. hesperius (A.Gray) Jeps. accepted as Symphyotrichum lanceolatum (Willd.) G.L.Nesom
    » Variety Aster foliaceus var. lyallii (A.Gray) Cronquist accepted as Symphyotrichum hendersonii (Fernald) G.L.Nesom
    » Variety Aster foliaceus var. parryi A.Gray accepted as Symphyotrichum foliaceum var. parryi (D.C.Eaton) G.L.Nesom
    » Variety Aster foliaceus var. sublinearis D.C.Eaton & Grisc. accepted as Symphyotrichum foliaceum var. foliaceum (Lindl. ex DC.) G.L.Nesom
    » Variety Aster foliaceus var. sublinearis Griscom & R.J.Eaton accepted as Symphyotrichum novi-belgii var. novi-belgii (L.)
    » Variety Aster foliaceus var. subpetiolatus Fernald accepted as Symphyotrichum foliaceum var. parryi (D.C.Eaton) G.L.Nesom
    » Variety Aster foliaceus var. typicus Onno accepted as Symphyotrichum foliaceum (Lindl. ex DC.) G.L.Nesom
    » Variety Aster foliaceus var. coridifolius (Michx.) Nutt. (uncertain > unassessed)
    » Variety Aster foliaceus var. subgeminatus Fernald (uncertain > unassessed)
  » Species Aster foliolosus Elliott accepted as Symphyotrichum dumosum (L.) G.L.Nesom (unaccepted)
  » Species Aster foliolosus Dryand. ex Aiton accepted as Symphyotrichum lateriflorum (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster foliosus (DC.) Kuntze accepted as Haplopappus foliosus DC. (unaccepted)
  » Species Aster foliosus Pers. accepted as Symphyotrichum dumosum (L.) G.L.Nesom (unaccepted)
  » Species Aster fontinalis Alexander accepted as Symphyotrichum fontinale (Alexander) G.L.Nesom (unaccepted)
  » Species Aster formosus Kuntze accepted as Lorandersonia pulchella (A.Gray) Urbatsch, R.P.Roberts & Neubig (unaccepted)
  » Species Aster forrestii Stapf accepted as Aster souliei Franch. (unaccepted)
  » Species Aster forsteri (Hook.f.) F.Muell. accepted as Olearia paniculata Druce (unaccepted)
  » Species Aster forsteri (Hook.f.) Kuntze accepted as Olearia paniculata Druce (unaccepted)
  » Species Aster forwoodii S.Watson accepted as Eurybia conspicua (Lindl.) G.L.Nesom (unaccepted)
  » Species Aster fragilis Willd. accepted as Symphyotrichum racemosum (Elliott) G.L.Nesom (unaccepted)
  » Species Aster franchetianus H.Lév. accepted as Kalimeris integrifolia Turcz. ex DC. (unaccepted)
  » Species Aster franklinianus Rydb. accepted as Symphyotrichum boreale (Torr. & A.Gray) Á.Löve & D.Löve (unaccepted)
  » Species Aster fremontii (Torr. & A.Gray) A.Gray accepted as Symphyotrichum spathulatum var. spathulatum (Lindl.) G.L.Nesom (unaccepted)
  » Species Aster frondeus (A.Gray) Greene accepted as Symphyotrichum foliaceum var. parryi (D.C.Eaton) G.L.Nesom (unaccepted)
  » Species Aster frondosus (Nutt.) Torr. & A.Gray accepted as Symphyotrichum frondosum (Nutt.) G.L.Nesom (unaccepted)
  » Species Aster frutescens S.Watson accepted as Xylorhiza frutescens (S.Watson) Greene (unaccepted)
  » Species Aster frutetorum Wimm. ex Nyman accepted as Symphyotrichum ×salignum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster fruticosus L. accepted as Felicia fruticosa (L.) G.Nicholson (unaccepted)
  » Species Aster fruticulosus L. accepted as Felicia fruticosa (L.) G.Nicholson (unaccepted)
  » Species Aster fruticulosus Willd. accepted as Felicia fruticosa subsp. fruticosa (L.) G.Nicholson (unaccepted)
  » Species Aster fugax Brot. accepted as Galatella aragonensis (Asso) Nees (unaccepted)
  » Species Aster fulvidus (Archer) Kuntze accepted as Olearia fulvida Archer ex Kuntze (unaccepted)
  » Species Aster furcatus E.S.Burgess accepted as Eurybia furcata (E.S.Burgess) G.L.Nesom (unaccepted)
  » Species Aster furfuraceus A.Rich. accepted as Olearia furfuracea (A.Rich.) Hook.f. (unaccepted)
  » Species Aster furfuraceus A.Rich. & Lesson accepted as Olearia furfuracea (A.Rich.) Hook.f. (unaccepted)
  » Species Aster fusanensis H.Lév. & Vaniot accepted as Aster hispidus Thunb. (unaccepted)
  » Species Aster ganlun Kitam. accepted as Aster souliei Franch. (unaccepted)
  » Species Aster garibaldii Brügger accepted as Aster alpinus L. (unaccepted)
  » Species Aster gaspensis Vict. accepted as Symphyotrichum anticostense (Fernald) G.L.Nesom (unaccepted)
  » Species Aster gattingeri Alexander accepted as Eurybia paludosa (Sol. ex Aiton) G.L.Nesom (unaccepted)
  » Species Aster gattingeri Kuntze accepted as Solidago gattingeri (unaccepted)
  » Species Aster gayanus DC. accepted as Erigeron gilliesii (Hook. & Arn.) Cabrera (unaccepted)
  » Species Aster gebleri Besser ex DC. accepted as Kalimeris altaica (Willd.) Nees ex Fisch.Mey. & Avé-Lall. (unaccepted)
  » Species Aster gentryi Standl. accepted as Psilactis gentryi (Standl.) D.R.Morgan (unaccepted)
  » Species Aster georgianus Alexander accepted as Symphyotrichum georgianum (Alexander) G.L.Nesom (unaccepted)
  » Species Aster germanicus (L.) Cav. accepted as Inula germanica L. (unaccepted)
  » Species Aster geyeri (A.Gray) Howell accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster giganteus Hort. ex Vilm. accepted as Vernonia noveboracensis (L.) Michx. (unaccepted)
  » Species Aster giganteus (Hook.) Rydb. accepted as Eurybia sibirica (L.) G.L.Nesom (unaccepted)
  » Species Aster gilliesii Hook. & Arn. accepted as Erigeron gilliesii (Hook. & Arn.) Cabrera (unaccepted)
  » Species Aster glabellus Nees accepted as Symphyotrichum ericoides (L.) G.L.Nesom (unaccepted)
  » Species Aster glaber E.Mey. ex Nees accepted as Symphyotrichum lateriflorum (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster glabratus (Phil.) Kuntze accepted as Haplopappus glutinosus Cass. (unaccepted)
  » Species Aster glabratus (DC.) Korsh. accepted as Galatella tatarica (Less.) Novopokr. (unaccepted)
  » Species Aster glabratus (Greene) S.F.Blake ex M.Peck accepted as Eucephalus glabratus (Greene) Greene (unaccepted)
  » Species Aster glabratus (Lindl. ex DC.) B.Fedtsch. accepted as Galatella tatarica (Less.) Novopokr. (unaccepted)
  » Species Aster glabratus (Hoppe & Hornsch.) E.H.L.Krause accepted as Erigeron glabratus Hoppe & Hornsch. ex Bluff & Fingerh. (unaccepted)
  » Species Aster glabrifolius (DC.) Reiche accepted as Symphyotrichum glabrifolium (DC.) G.L.Nesom (unaccepted)
  » Species Aster glabriuscula (Nutt.) Torr. & A.Gray accepted as Xylorhiza glabriuscula Nutt. (unaccepted)
  » Species Aster glacialis Nutt. accepted as Erigeron glacialis (Nutt.) A.Nelson (unaccepted)
  » Species Aster glandulosus (Keissl.) Hand.-Mazz. accepted as Aster flaccidus Bunge (unaccepted)
  » Species Aster glaucescens (A.Gray) S.F.Blake accepted as Eucephalus glaucescens (A.Gray) Greene (unaccepted)
  » Species Aster glaucescens Wender. ex Nees accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster glaucodes S.F.Blake accepted as Herrickia glauca (Nutt.) Brouillet (unaccepted)
  » Species Aster glaucophyllus (Piper) Frye & Rigg accepted as Eucephalus glaucescens (A.Gray) Greene (unaccepted)
  » Species Aster glaucus (Nutt.) Torr. & A.Gray accepted as Herrickia glauca (Nutt.) Brouillet (unaccepted)
  » Species Aster glaucus Nees accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster glaucus (Ker Gawl.) Pépin accepted as Erigeron glaucus Ker Gawl. (unaccepted)
  » Species Aster glomeratus (Michx.) Kuntze accepted as Solidago glomerata Michx. (unaccepted)
  » Species Aster glomeratus (Bernh. ex Nees) accepted as Eurybia schreberi (Nees) Nees (unaccepted)
  » Species Aster glossophyllus Piper accepted as Dieteria canescens var. canescens (Pursh) Nutt. (unaccepted)
  » Species Aster glutescens (Sond.) F.Muell. accepted as Olearia passerinoides subsp. glutescens (F.Muell. ex Sond.) D.A.Cooke (unaccepted)
  » Species Aster glutinosus (Less.) Kuntze accepted as Haplopappus glutinosus Cass. (unaccepted)
  » Species Aster glutinosus Roxb. accepted as Commidendrum rugosum (Aiton) DC. (unaccepted)
  » Species Aster glutinosus Cav. accepted as Grindelia glutinosa (Cav.) Mart. (unaccepted)
  » Species Aster gmelinii Ledeb. accepted as Senecio gmelinii (unaccepted)
  » Species Aster gnaphalioides (Baker) Hassl. accepted as Noticastrum gnaphalioides (Baker) Cuatrec. (unaccepted)
  » Species Aster gooddingii Onno accepted as Xylorhiza tortifolia var. tortifolia (Torr. & A.Gray) Greene (unaccepted)
  » Species Aster gormanii (Piper) S.F.Blake accepted as Eucephalus gormanii Piper (unaccepted)
  » Species Aster gouldii C.E.C.Fisch. accepted as Heteropappus gouldii (C.E.C.Fisch.) Grierson (unaccepted)
  » Species Aster gracilentus Banks ex DC. accepted as Chrysopsis villosa (Pursh) Nutt. ex DC. (unaccepted)
  » Species Aster gracilentus Torr. & A.Gray accepted as Symphyotrichum laeve var. purpuratum (Nees) G.L.Nesom (unaccepted)
  » Species Aster gracilescens E.S.Burgess accepted as Symphyotrichum undulatum (L.) G.L.Nesom (unaccepted)
  » Species Aster gracilicaulis Y.Ling accepted as Aster gracilicaulis Y.Ling ex J.Q.Fu (unaccepted)
  » Species Aster gracilipes (Wiegand) Alexander ex Small accepted as Symphyotrichum dumosum var. gracilipes (Wiegand) G.L.Nesom (unaccepted)
  » Species Aster gracilipes (Wiegand) Alexander accepted as Symphyotrichum dumosum var. gracilipes (Wiegand) G.L.Nesom (unaccepted)
  » Species Aster gracilis Nutt. accepted as Eurybia compacta G.L.Nesom (unaccepted)
  » Species Aster gracillimus (Torr. & A.Gray) Kuntze accepted as Solidago stricta subsp. gracillima (Torr. & A.Gray) Semple (unaccepted)
  » Species Aster graminifolius (L.) Kuntze accepted as Euthamia graminifolia (L.) Nutt. (unaccepted)
  » Species Aster graminifolius Pursh accepted as Nidorella foetida (L.) DC. (unaccepted)
  » Species Aster grandiflorus L. accepted as Symphyotrichum grandiflorum (L.) G.L.Nesom (unaccepted)
  » Species Aster grauii W.Lippert accepted as Aster bakerianus Burtt Davy ex C.A.Sm. (unaccepted)
  » Species Aster graveolens Nutt. accepted as Symphyotrichum oblongifolium (Nutt.) G.L.Nesom (unaccepted)
  » Species Aster graveolens (Nutt.) Kuntze accepted as Ericameria nauseosa var. graveolens (Nutt.) Reveal & Schuyler (unaccepted)
    » Variety Aster graveolens var. graveolens (Nutt.) Kuntze accepted as Aster graveolens (Nutt.) Kuntze
    » Variety Aster graveolens var. oliganthus Kuntze (uncertain > unassessed)
  » Species Aster gravesii E.S.Burgess accepted as Symphyotrichum ×gravesii G.L.Nesom (unaccepted)
  » Species Aster gravis F.Muell. accepted as Olearia gravis (F.Muell.) F.Muell. ex Benth. (unaccepted)
  » Species Aster grayi Suksd. accepted as Symphyotrichum subspicatum (Nees) G.L.Nesom (unaccepted)
  » Species Aster greatae Parish accepted as Symphyotrichum greatae (Parish) G.L.Nesom (unaccepted)
  » Species Aster greenei (A.Gray) Kuntze accepted as Ericameria greenei (A.Gray) G.L.Nesom (unaccepted)
  » Species Aster grimmii (Regel & Schmalh.) B.Fedtsch. accepted as Linosyris grimmii Regel & Schmalh. (unaccepted)
  » Species Aster grindelioides (DC.) Kuntze accepted as Haplopappus grindelioides (Less.) DC. (unaccepted)
  » Species Aster grisebachii Britton accepted as Neja marginata (Griseb.) G.L.Nesom (unaccepted)
  » Species Aster griseus Kuntze accepted as Haplopappus canescens Reiche (unaccepted)
  » Species Aster griseus Greene accepted as Symphyotrichum ascendens (Lindl.) G.L.Nesom (unaccepted)
  » Species Aster grossedentatus Dinter accepted as Felicia brevifolia (DC.) Grau (unaccepted)
  » Species Aster guiradonis (A.Gray) Kuntze accepted as Solidago guiradonis A.Gray (unaccepted)
  » Species Aster gummiferus Hook.f. accepted as Commidendrum spurium (G.Forst.) DC. (unaccepted)
  » Species Aster gymnocephalus (Rupr.) B.Fedtsch. accepted as Brachyactis gymnocephala Rupr. (unaccepted)
  » Species Aster gymnocephalus (DC.) A.Gray accepted as Xanthisma blephariphyllum (A.Gray) D.R.Morgan & R.L.Hartm. (unaccepted)
  » Species Aster gypsophilus B.L.Turner accepted as Symphyotrichum gypsophilum (B.L.Turner) G.L.Nesom (unaccepted)
  » Species Aster haastii (Hook.f.) Kuntze accepted as Olearia haastii Hook.f. (unaccepted)
  » Species Aster hallii A.Gray accepted as Symphyotrichum hallii (A.Gray) G.L.Nesom (unaccepted)
  » Species Aster haplopappus (J.Rémy) Kuntze accepted as Noticastrum sericeum (Less.) Less. ex Phil. (unaccepted)
  » Species Aster haplopappus (J.Rémy) Reiche accepted as Noticastrum sericeum (Less.) Less. ex Phil. (unaccepted)
  » Species Aster harbourii Kuntze accepted as Ericameria parryi var. parryi (A.Gray) G.L.Nesom & Baird (unaccepted)
  » Species Aster hartwegii (A.Gray) Kuntze accepted as Isocoma hartwegii (A.Gray) Greene (unaccepted)
  » Species Aster hashimotoi Kitam. accepted as Doellingeria sekimotoi (Makino) G.L.Nesom (unaccepted)
  » Species Aster hauptii Ledeb. accepted as Galatella hauptii (Ledeb.) Lindl. ex Lindl. (unaccepted)
  » Species Aster hauptii Turcz. ex DC. accepted as Galatella dahurica DC. (unaccepted)
  » Species Aster haydenii Porter accepted as Oreostemma alpigenum var. haydenii (Porter) G.L.Nesom (unaccepted)
  » Species Aster hebecladus DC. accepted as Symphyotrichum ericoides var. ericoides (L.) G.L.Nesom (unaccepted)
  » Species Aster hectori (Hook.f.) Kuntze accepted as Olearia hectorii Hook.f. (unaccepted)
  » Species Aster hedinii Ostenf. accepted as Aster asteroides (DC.) Kuntze (unaccepted)
  » Species Aster helenium (L.) Scop. accepted as Inula helenium L. (unaccepted)
  » Species Aster heleophilus F.Muell. accepted as Olearia heleophila F.Muell. (unaccepted)
  » Species Aster hemisphericus Alexander accepted as Eurybia paludosa (Sol. ex Aiton) G.L.Nesom (unaccepted)
  » Species Aster hemsleyi Kuntze accepted as Solidago paniculata DC. (unaccepted)
  » Species Aster hendersonii Fernald accepted as Symphyotrichum hendersonii (Fernald) G.L.Nesom (unaccepted)
  » Species Aster herveyi A.Gray accepted as Eurybia ×herveyi (A.Gray) G.L.Nesom (unaccepted)
  » Species Aster hesperius A.Gray accepted as Symphyotrichum lanceolatum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster heterochaeta Benth. ex C.B.Clarke accepted as Aster flaccidus Bunge (unaccepted)
  » Species Aster heterochaeta Benth. & Clarke accepted as Erigeron heterochaeta (Benth. ex Benth.) Botsch. (unaccepted)
  » Species Aster heteromallus Wender. accepted as Symphyotrichum undulatum (L.) G.L.Nesom (unaccepted)
  » Species Aster heterophyllus Willd. accepted as Symphyotrichum cordifolium (L.) G.L.Nesom (unaccepted)
  » Species Aster heterophyllus Thunb. accepted as Athrixia heterophylla subsp. heterophylla (Thunb.) Less. (unaccepted)
  » Species Aster heterophyllus (A.Gray) Kuntze accepted as Isocoma pluriflora (Torr. & A.Gray) Greene (unaccepted)
    » Variety Aster heterophyllus var. heterophyllus (A.Gray) Kuntze accepted as Aster heterophyllus (A.Gray) Kuntze
    » Variety Aster heterophyllus var. glabriusculus DC. (uncertain > unassessed)
    » Variety Aster heterophyllus var. scaber DC. (uncertain > unassessed)
  » Species Aster heterotrichus Hara accepted as Erigeron thunbergii subsp. glabratus var. heterotrichus (Hara) Hara (unaccepted)
  » Species Aster heynei F.Muell. accepted as Olearia xerophila (F.Muell.) F.Muell. ex Benth. (unaccepted)
  » Species Aster hiemalis Nees accepted as Symphyotrichum novi-belgii var. novi-belgii (L.) (unaccepted)
  » Species Aster hintonii G.L.Nesom accepted as Symphyotrichum hintonii (G.L.Nesom) G.L.Nesom (unaccepted)
  » Species Aster hirsuticaulis Lindl. ex DC. accepted as Symphyotrichum lateriflorum var. lateriflorum (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster hirsutus Host accepted as Aster alpinus L. (unaccepted)
  » Species Aster hirsutus (Vent.) Harv. accepted as Felicia cymbalariae subsp. cymbalariae (Aiton) Bolus & Wolley-Dod ex Adamson & T.M.Salter (unaccepted)
  » Species Aster hirtellus (Phil.) Kuntze accepted as Haplopappus hirtellus Phil. (unaccepted)
  » Species Aster hirtellus Lindl. accepted as Symphyotrichum urophyllum (Lindl. ex Lindl.) G.L.Nesom (unaccepted)
  » Species Aster hirtellus Lindl. ex DC. accepted as Symphyotrichum urophyllum (Lindl. ex Lindl.) G.L.Nesom (unaccepted)
  » Species Aster hirtifolius S.F.Blake accepted as Chaetopappa ericoides (Torr.) G.L.Nesom (unaccepted)
  » Species Aster hirtus Thunb. accepted as Felicia hirta (Thunb.) Grau (unaccepted)
  » Species Aster hirtus Scop. accepted as Inula hirta L. (unaccepted)
  » Species Aster hirtus (DC.) Harv. accepted as Felicia aculeata Grau (unaccepted)
  » Species Aster hirtus K.Koch accepted as Aster amellus subsp. ibericus V.E.Avet. (unaccepted)
  » Species Aster hispanicus Coincy accepted as Aster alpinus L. (unaccepted)
  » Species Aster hispidulus (DC.) Kuntze accepted as Erigeron fasciculatus Colla (unaccepted)
  » Species Aster hispidus (Thunb.) Baker accepted as Aster bakerianus Burtt Davy ex C.A.Sm. (unaccepted)
  » Species Aster hispidus Thunb. accepted as Kalimeris hispida (Thunb.) Nees (unaccepted)
  » Species Aster hispidus Lam. accepted as Symphyotrichum puniceum (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster hispidus (Muhl. ex Willd.) Kuntze accepted as Solidago nemoralis Aiton (unaccepted)
  » Species Aster hispidus Murray accepted as Kalimeris hispida (Thunb.) Nees (unaccepted)
  » Species Aster holophyllus Hemsl. accepted as Kalimeris integrifolia Turcz. ex DC. (unaccepted)
  » Species Aster holosericeus G.Forst. accepted as Celmisia holosericea (G.Forst.) Hook.f. (unaccepted)
  » Species Aster homochlamydeus Hand.-Mazz. accepted as Aster ageratoides var. grossedentatus (Franch. ex Diels) Kitam. (unaccepted)
  » Species Aster homolepis F.Muell. accepted as Olearia homolepis (F.Muell.) Benth. (unaccepted)
  » Species Aster hookeri F.Muell. ex Benth. accepted as Olearia ramulosa (Labill.) Benth. (unaccepted)
  » Species Aster hookerianus (Torr. & A.Gray) Kuntze accepted as Haplopappus hookerianus (Torr. & A.Gray) A.Gray (unaccepted)
  » Species Aster hoorebekia (DC.) Kuntze accepted as Grindelia chiloensis (Cornel.) Cabrera (unaccepted)
  » Species Aster horizontalis Desf. accepted as Symphyotrichum lateriflorum var. horizontale (Desf.) G.L.Nesom (unaccepted)
  » Species Aster horridifolius H.Lév. & Vaniot accepted as Aster maackii Regel (unaccepted)
  » Species Aster horridus (Wooton & Standl.) S.F.Blake accepted as Herrickia horrida Wooton & Standl. (unaccepted)
  » Species Aster houghtonii (Torr. & A.Gray) Kuntze accepted as Solidago houghtonii Torr. & A.Gray ex Torr. & A.Gray (unaccepted)
  » Species Aster howardii (Parry ex A.Gray) Kuntze accepted as Ericameria parryi var. howardii (Parry ex A.Gray) G.L.Nesom & G.I.Baird (unaccepted)
  » Species Aster howellii Kuntze accepted as Columbiadoria hallii (A.Gray) G.L.Nesom (unaccepted)
  » Species Aster huegelii F.Muell. accepted as Olearia ciliata (Benth.) F.Muell. ex Benth. (unaccepted)
    » Variety Aster huegelii var. huegelii F.Muell. accepted as Aster huegelii F.Muell.
    » Variety Aster huegelii var. squamifolia F.Muell. (uncertain > unassessed)
    » Variety Aster huegelii var. squamifolius F.Muell. (uncertain > unassessed)
  » Species Aster humilis Willd. accepted as Doellingeria infirma (Michx.) Greene (unaccepted)
  » Species Aster humilis Banks & Sol. ex Hook.f. accepted as Vittadinia australis A.Rich. (unaccepted)
  » Species Aster hungaricus Poir. accepted as Symphyotrichum ×salignum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster hydrabadensis Wall. accepted as Pulicaria wightiana (DC.) C.B.Clarke (unaccepted)
  » Species Aster hydrophilus Greene ex Wooton & Standl. accepted as Almutaster pauciflorus (Nutt.) Á.Löve & D.Löve (unaccepted)
  » Species Aster hygrophilus A.Cunn. ex DC. accepted as Olearia hygrophila (DC.) Benth. (unaccepted)
  » Species Aster hyssopifolius Cav. accepted as Galatella sedifolia (L.) Greuter (unaccepted)
  » Species Aster hyssopifolius L. accepted as Galatella sedifolia (L.) Greuter (unaccepted)
  » Species Aster hyssopifolius P.J.Bergius accepted as Felicia hyssopifolia subsp. hyssopifolia (P.J.Bergius) Nees (unaccepted)
  » Species Aster ibericus Steven ex M.Bieb. accepted as Aster amellus subsp. ibericus V.E.Avet. (unaccepted)
  » Species Aster ignoratus Kunth & C.D.Bouché accepted as Aster albescens (DC.) Wall. ex Hand.-Mazz. (unaccepted)
  » Species Aster iinumae Kitam. accepted as Aster iinumae Kitam. ex Hara (unaccepted)
  » Species Aster ilicifolius A.Cunn. ex DC. accepted as Olearia myrsinoides (Labill.) F.Muell. ex Benth. (unaccepted)
  » Species Aster ilicifolius (Hook.f.) F.Muell. accepted as Olearia ilicifolia Hook.f. (unaccepted)
  » Species Aster ilicifolius (J.Rémy) Kuntze accepted as Haplopappus mucronatus (Hook. & Arn.) Hook. & Arn. ex B.D.Jacks. (unaccepted)
  » Species Aster illinitus (Phil.) Kuntze accepted as Haplopappus velutinus J.Rémy (unaccepted)
  » Species Aster illitus (F.Muell.) F.Muell. accepted as Olearia elliptica DC. (unaccepted)
  » Species Aster illyricus (Murb.) K.Malý accepted as Galatella sedifolia subsp. illyrica (Murb.) Greuter (unaccepted)
  » Species Aster imbricatus Walp. accepted as Erigeron arenarioides (D.C.Eaton ex A.Gray) A.Gray ex Rydb. (unaccepted)
  » Species Aster imbricatus (DC.) Harv. accepted as Polyarrhena imbricata (DC.) Grau (unaccepted)
  » Species Aster imbricatus L. accepted as Polyarrhena reflexa subsp. reflexa (L.) Cass. (unaccepted)
  » Species Aster incanopilosus (Lindl.) E.Sheld. accepted as Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom (unaccepted)
  » Species Aster incanus (Lindl.) A.Gray accepted as Corethrogyne filaginifolia (Hook. & Arn.) Nutt. (unaccepted)
  » Species Aster incisus Fisch. accepted as Kalimeris incisa (Fisch.) DC. (unaccepted)
  » Species Aster inconspicuus Less. accepted as Symphyotrichum subulatum var. parviflorum (Nees) S.D.Sundb. (unaccepted)
  » Species Aster infirmus Michx. accepted as Doellingeria infirma (Michx.) Greene (unaccepted)
  » Species Aster inornatus Greene accepted as Dieteria canescens var. shastensis (A.Gray) D.R.Morgan & R.L.Hartm. (unaccepted)
  » Species Aster insignis (Hook.f.) F.Muell. accepted as Pachystegia insignis (Hook.f.) Cheeseman (unaccepted)
  » Species Aster insularis Makino accepted as Aster hispidus var. insularis (Makino) Mot.Ito (unaccepted)
  » Species Aster integrifolius (Turcz. ex DC.) Franch. accepted as Kalimeris integrifolia Turcz. ex DC. (unaccepted)
  » Species Aster integrifolius Nutt. accepted as Eurybia integrifolia (Nutt.) G.L.Nesom (unaccepted)
  » Species Aster interior Wiegand accepted as Symphyotrichum lanceolatum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster intermedius Turcz. ex DC. accepted as Aster flaccidus Bunge (unaccepted)
  » Species Aster intricatus (A.Gray) S.F.Blake accepted as Bigelowia intricata A.Gray (unaccepted)
  » Species Aster intybaceus Kunth & C.D.Bouché accepted as Eurybia sibirica (L.) G.L.Nesom (unaccepted)
  » Species Aster inulifolius Boiss. & Balansa accepted as Kemulariella caucasica (Willd.) Tamansch. (unaccepted)
  » Species Aster inuloides D.Don accepted as Erigeron multiradiatus (Lindl. ex DC.) Benth. & Hook.f. (unaccepted)
  » Species Aster invenustus Greene accepted as Symphyotrichum chilense (Nees) G.L.Nesom (unaccepted)
  » Species Aster iodochrous (F.Muell.) F.Muell. accepted as Olearia iodochroa (F.Muell.) F.Muell. ex Benth. (unaccepted)
  » Species Aster ircutianus DC. accepted as Eurybia sibirica (L.) G.L.Nesom (unaccepted)
  » Species Aster jacksonii Kuntze accepted as Solidago rigida subsp. glabrata (Braun) S.B.Heard & Semple (unaccepted)
  » Species Aster jalapensis Fernald accepted as Symphyotrichum bullatum (Klatt) G.L.Nesom (unaccepted)
  » Species Aster jamaicensis (L.) Less. accepted as Erigeron jamaicensis L. (unaccepted)
  » Species Aster japonicus (Miq.) Franch. & Sav. accepted as Aster miquelianus Hara (unaccepted)
  » Species Aster javanicus Garcin ex Burm.f. accepted as Kalimeris indica (L.) Sch.Bip. (unaccepted)
  » Species Aster jessicae Piper accepted as Symphyotrichum jessicae (Piper) G.L.Nesom (unaccepted)
  » Species Aster jessicae Suksd. accepted as Symphyotrichum jessicae (Piper) G.L.Nesom (unaccepted)
  » Species Aster johannensis Fernald accepted as Symphyotrichum novi-belgii var. novi-belgii (L.) (unaccepted)
  » Species Aster jonesiae Lamboy accepted as Eurybia jonesiae (Lamboy) G.L.Nesom (unaccepted)
  » Species Aster junceus Aiton accepted as Symphyotrichum novi-belgii var. novi-belgii (L.) (unaccepted)
  » Species Aster junciformis Rydb. accepted as Symphyotrichum boreale (Torr. & A.Gray) Á.Löve & D.Löve (unaccepted)
  » Species Aster juniperinus E.S.Burgess accepted as Symphyotrichum pilosum var. pilosum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster jussiei (Coss.) E.S.Burgess accepted as Eurybia macrophylla (L.) Cass. (unaccepted)
  » Species Aster kaempferi A.Gray accepted as Aster ovatus (Franch. & Sav.) Mot.Ito & Soejima (unaccepted)
  » Species Aster kawaguchii Kitam. accepted as Aster yunnanensis var. angustior Hand.-Mazz. (unaccepted)
  » Species Aster kentuckiensis Britton accepted as Symphyotrichum priceae (Britton) G.L.Nesom (unaccepted)
  » Species Aster kernotii F.Muell. accepted as Olearia kernotii (F.Muell.) Mattf. (unaccepted)
  » Species Aster kingii D.C.Eaton accepted as Herrickia kingii (D.C.Eaton) Brouillet, Urbatsch & R.P.Roberts (unaccepted)
  » Species Aster kirghisorum (Fisch. ex M.Bieb.) Korsh. accepted as Galatella divaricata (Fisch. ex M.Bieb.) Novopokr. (unaccepted)
  » Species Aster koidzumianus (Kitam.) Nemoto accepted as Aster hispidus var. koidzumianus (Kitam.) Mot.Ito (unaccepted)
  » Species Aster koidzumianus Makino accepted as Aster maackii Regel (unaccepted)
  » Species Aster komarovii H.Lév. & Vaniot accepted as Doellingeria scabra (Thunb.) Nees (unaccepted)
  » Species Aster kootenayi A.Nelson & J.F.Macbr. accepted as Symphyotrichum hendersonii (Fernald) G.L.Nesom (unaccepted)
  » Species Aster koraiensis Nakai accepted as Miyamayomena koraiensis (Nakai) Kitam. (unaccepted)
  » Species Aster korsakoviensis H.Lév. & Vaniot accepted as Aster glehnii F.Schmidt (unaccepted)
  » Species Aster korshinskyi Tamamsch. accepted as Aster alpinus L. (unaccepted)
  » Species Aster kraussii (Sch.Bip. ex Sch.Bip.) Harv. accepted as Felicia aethiopica subsp. aethiopica (Burm.f.) Bolus & Wolley-Dod ex Adamson & T.M.Salt (unaccepted)
  » Species Aster kumleinii Fr. ex A.Gray accepted as Symphyotrichum oblongifolium (Nutt.) G.L.Nesom (unaccepted)
  » Species Aster labrangensis Hand.-Mazz. accepted as Aster yunnanensis var. labrangensis (Hand.-Mazz.) Y.Ling (unaccepted)
  » Species Aster lacerus Lindl. ex DC. accepted as Eurybia sibirica (L.) G.L.Nesom (unaccepted)
  » Species Aster lacinians Borbás accepted as Callistephus chinensis (L.) Nees (unaccepted)
  » Species Aster lacunarum Aitch. & Hemsl. accepted as Chamaegeron oligocephalus Schrenk (unaccepted)
  » Species Aster lacunosus (Hook.f.) Kuntze accepted as Olearia lacunosa Hook.f. (unaccepted)
  » Species Aster laetevirens Greene accepted as Symphyotrichum lanceolatum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster laetus Fisch. ex Ledeb. accepted as Galatella sedifolia (L.) Greuter (unaccepted)
  » Species Aster laevigatus Willd. accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve (unaccepted)
  » Species Aster laevigatus Lam. accepted as Symphyotrichum novi-belgii (L.) G.L.Nesom (unaccepted)
  » Species Aster laevis L. accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve (unaccepted)
    » Forma Aster laevis f. laevis accepted as Aster laevis L.
    » Subspecies Aster laevis subsp. geyeri (A.Gray) Piper accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve
    » Subspecies Aster laevis subsp. laevis accepted as Aster laevis L.
    » Variety Aster laevis var. abbreviatus Lunell accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve
    » Variety Aster laevis var. amplifolius Porter accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve
    » Variety Aster laevis var. concinnus (Willd.) House accepted as Symphyotrichum laeve var. concinnum (Willd.) G.L.Nesom
    » Variety Aster laevis var. cyaneus (Hoffm.) A.Gray accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve
    » Variety Aster laevis var. falcatus Farw. accepted as Symphyotrichum laeve var. laeve (L.) Á.Löve & D.Löve
    » Variety Aster laevis var. geyeri A.Gray accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve
    » Variety Aster laevis var. guadalupensis A.G.Jones accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve
    » Variety Aster laevis var. laevigatus (Willd.) A.Gray accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve
    » Variety Aster laevis var. laevis accepted as Aster laevis L.
    » Variety Aster laevis var. laevis Cronquist accepted as Aster laevis L.
    » Variety Aster laevis var. latifolius Porter accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve
    » Variety Aster laevis var. panduratus Farw. accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve
    » Variety Aster laevis var. purpuratus (Nees) A.G.Jones accepted as Symphyotrichum laeve var. purpuratum (Nees) G.L.Nesom
    » Variety Aster laevis var. simplex Cockerell accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve
    » Variety Aster laevis var. sourisensis Lunell accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve
    » Variety Aster laevis var. strictiflora Osterh. accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve
    » Variety Aster laevis var. thyrsoideus Farw. accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve
    » Variety Aster laevis var. undulatifolius Lunell accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve
    » Forma Aster laevis f. beckwithiae House (uncertain > unassessed)
    » Forma Aster laevis f. falcatus (Farw.) F.Seym. (uncertain > unassessed)
    » Forma Aster laevis f. latifolius (Porter) Shinners (uncertain > unassessed)
    » Forma Aster laevis f. purpurascens Farw. (uncertain > unassessed)
    » Variety Aster laevis var. concinnus (Menezes) Christenson (uncertain > unassessed)
    » Variety Aster laevis var. cyaneus (Hoff) Torr. (uncertain > unassessed)
    » Variety Aster laevis var. potomacensis E.S.Burgess (uncertain > unassessed)
  » Species Aster lamarckianus Nees accepted as Symphyotrichum lanceolatum subsp. lanceolatum var. lanceolatum (Willd.) G.L.Nesom (unaccepted)
    » Variety Aster lamarckianus var. lamarckianus accepted as Aster lamarckianus Nees
    » Variety Aster lamarckianus var. bellidiflorus (Willd.) Small (uncertain > unassessed)
  » Species Aster lanatus (Hook.f.) Kuntze accepted as Haplopappus lanatus Hook.f. (unaccepted)
  » Species Aster lanceolatus Willd. accepted as Symphyotrichum lanceolatum (Willd.) G.L.Nesom (unaccepted)
    » Subspecies Aster lanceolatus subsp. hesperius (A.Gray) Semple & Chmiel. accepted as Symphyotrichum lanceolatum (Willd.) G.L.Nesom
    » Subspecies Aster lanceolatus subsp. interior (Wiegand) A.G.Jones accepted as Symphyotrichum lanceolatum var. interior (Wiegand) G.L.Nesom
    » Subspecies Aster lanceolatus subsp. lanceolatus accepted as Aster lanceolatus Willd.
    » Subspecies Aster lanceolatus subsp. simplex (Willd.) A.G.Jones accepted as Symphyotrichum lanceolatum subsp. lanceolatum var. lanceolatum (Willd.) G.L.Nesom
    » Variety Aster lanceolatus var. hirsuticaulis Semple & Chmiel. accepted as Symphyotrichum lanceolatum var. hirsuticaule (Semple & Chmiel.) G.L.Nesom
    » Variety Aster lanceolatus var. interior (Wiegand) A.G.Jones accepted as Symphyotrichum lanceolatum var. interior (Wiegand) G.L.Nesom
    » Variety Aster lanceolatus var. interior (Wiegand) Semple & Chmiel. accepted as Symphyotrichum lanceolatum var. interior (Wiegand) G.L.Nesom
    » Variety Aster lanceolatus var. lanceolatus accepted as Aster lanceolatus Willd.
    » Variety Aster lanceolatus var. latifolius Semple & Chmiel. accepted as Symphyotrichum lanceolatum var. latifolium (Semple & Chmiel.) G.L.Nesom
    » Variety Aster lanceolatus var. simplex (Willd.) A.G.Jones accepted as Symphyotrichum lanceolatum subsp. lanceolatum var. lanceolatum (Willd.) G.L.Nesom
  » Species Aster lancifolius (Torr. & A.Gray) Kuntze accepted as Solidago lancifolia (Torr. & A.Gray) Chapm. (unaccepted)
  » Species Aster lanuginosus H.L.Wendl. accepted as Felicia clavipilosa subsp. clavipilosa Grau (unaccepted)
  » Species Aster lanuginosus Kuntze accepted as Felicia hirsuta DC. (unaccepted)
  » Species Aster lanuginosus (J.Small) Y.Ling accepted as Wardaster lanuginosus J.Small (unaccepted)
  » Species Aster laricifolius (Hook.f.) F.Muell. accepted as Celmisia laricifolia Hook.f. (unaccepted)
  » Species Aster laricifolius (A.Gray) Kuntze accepted as Ericameria laricifolia (A.Gray) Shinners (unaccepted)
  » Species Aster lasiocarpus (DC.) Harv. accepted as Felicia lasiocarpa DC. (unaccepted)
  » Species Aster lastarrianus (J.Rémy) Kuntze accepted as Haplopappus baylahuen J.Rémy (unaccepted)
  » Species Aster lateralis hort.bonn. ex Nees accepted as Symphyotrichum novi-belgii var. novi-belgii (L.) (unaccepted)
  » Species Aster lateriflorus (L.) Britton accepted as Symphyotrichum lateriflorum (L.) Á.Löve & D.Löve (unaccepted)
    » Variety Aster lateriflorus var. angustifolius Wiegand accepted as Symphyotrichum lateriflorum var. angustifolium (Wiegand) G.L.Nesom
    » Variety Aster lateriflorus var. bifrons (Lindl. ex DC.) Fernald accepted as Symphyotrichum lateriflorum (L.) Á.Löve & D.Löve
    » Variety Aster lateriflorus var. flagellaris Shinners accepted as Symphyotrichum lateriflorum var. flagellare (Shinners) G.L.Nesom
    » Variety Aster lateriflorus var. glomerullus (Torr. & A.Gray) E.S.Burgess accepted as Symphyotrichum lateriflorum (L.) Á.Löve & D.Löve
    » Variety Aster lateriflorus var. grandis Porter accepted as Symphyotrichum lateriflorum (L.) Á.Löve & D.Löve
    » Variety Aster lateriflorus var. hirsuticaulis (Lindl. ex DC.) Porter accepted as Symphyotrichum lateriflorum var. lateriflorum (L.) Á.Löve & D.Löve
    » Variety Aster lateriflorus var. horizontalis (Desf.) Farw. accepted as Symphyotrichum lateriflorum var. horizontale (Desf.) G.L.Nesom
    » Variety Aster lateriflorus var. indutus Shinners accepted as Symphyotrichum lateriflorum var. flagellare (Shinners) G.L.Nesom
    » Variety Aster lateriflorus var. lateriflorus accepted as Aster lateriflorus (L.) Britton
    » Variety Aster lateriflorus var. pendulus (Aiton) E.S.Burgess accepted as Symphyotrichum lateriflorum var. horizontale (Desf.) G.L.Nesom
    » Variety Aster lateriflorus var. spatelliformis (E.S.Burgess) A.G.Jones accepted as Symphyotrichum lateriflorum var. spatelliforme G.L.Nesom
    » Variety Aster lateriflorus var. tenuipes Wiegand accepted as Symphyotrichum lateriflorum var. tenuipes (Wiegand) G.L.Nesom
    » Variety Aster lateriflorus var. thyrsoideus (A.Gray) E.Sheld. accepted as Symphyotrichum ontarionis (Wiegand) G.L.Nesom
    » Variety Aster lateriflorus var. spatelliformis (E.S.Burgess) G.L.Nesom (uncertain > unassessed)
    » Variety Aster lateriflorus var. subdumosus (uncertain > unassessed)
  » Species Aster laticorymbus Vaniot accepted as Aster ageratoides var. laticorymbus (Vaniot) Hand.-Mazz. (unaccepted)
  » Species Aster latifolius Desf. accepted as Eurybia macrophylla (L.) Cass. (unaccepted)
  » Species Aster latifolius Mill. accepted as Galatella sedifolia subsp. rigida (DC.) Greuter (unaccepted)
  » Species Aster latifolius Banks ex Steud. accepted as Oclemena acuminata (Michx.) Greene (unaccepted)
  » Species Aster latifolius (L.) Kuntze accepted as Solidago flexicaulis L. (unaccepted)
  » Species Aster latissimifolius (Mill.) Kuntze accepted as Solidago latissimifolia Mill. (unaccepted)
  » Species Aster laurentianus Fernald accepted as Symphyotrichum laurentianum (Fernald) G.L.Nesom (unaccepted)
  » Species Aster lautureanus (Debeaux) Franch. accepted as Kalimeris lautureana (Debeaux) Kitam. (unaccepted)
  » Species Aster lautus Lunell accepted as Symphyotrichum lanceolatum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster lavandulaceus Willd. accepted as Diplostephium ericoides (Lam.) Cabrera (unaccepted)
  » Species Aster lavandulaceus Willd. ex DC. accepted as Diplostephium ericoides (Lam.) Cabrera (unaccepted)
  » Species Aster laxiflorus Lindl. accepted as Symphyotrichum novi-belgii var. novi-belgii (L.) (unaccepted)
  » Species Aster laxifolius Nees accepted as Symphyotrichum novi-belgii var. novi-belgii (L.) (unaccepted)
  » Species Aster laxus Torr. & A.Gray accepted as Symphyotrichum novi-belgii (L.) G.L.Nesom (unaccepted)
  » Species Aster laxus Benth. accepted as Aster ageratoides var. firmus (Diels) Hand.-Mazz. (unaccepted)
  » Species Aster laxus Willd. accepted as Symphyotrichum lanceolatum subsp. lanceolatum var. lanceolatum (Willd.) G.L.Nesom (unaccepted)
  » Species Aster leavenworthii (Torr. & A.Gray) Kuntze accepted as Solidago leavenworthii Torr. & A.Gray (unaccepted)
  » Species Aster ledifolius A.Cunn. ex DC. accepted as Olearia ledifolia (DC.) Benth. (unaccepted)
  » Species Aster ledifolius Pursh accepted as Oclemena nemoralis (Aiton) Greene (unaccepted)
  » Species Aster ledophyllus (A.Gray) A.Gray accepted as Eucephalus ledophyllus (A.Gray) Greene (unaccepted)
  » Species Aster lehmannii F.Muell. accepted as Olearia lehmanniana (Steetz) Lander (unaccepted)
  » Species Aster leiocarpus (DC.) Harv. accepted as Zyrphelis montana (Schltr.) G.L.Nesom (unaccepted)
  » Species Aster leiodes S.F.Blake accepted as Dieteria canescens var. canescens (Pursh) Nutt. (unaccepted)
  » Species Aster leiophyllus Porter accepted as Symphyotrichum cordifolium (L.) G.L.Nesom (unaccepted)