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The Botanical System of the Plants
Das Botanisches System der Pflanzen
Friedrich A. Lohmueller

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Overview Plants
Divisions

Species: ~ >300

• Aster abatus S.F.Blake (1925)
• Aster acadiensis Shinners (1944)= Symphyotrichum lateriflorum var. tenuipes (Wiegand) G.L.Nesom
• Aster acris L. = Aster sedifolius subsp. sedifolius
• Aster acris var. trinervis Pers.= Aster sedifolius subsp. trinervis (Pers.) Thell.
• Aster acaulis Wedd. (1857)
• Aster acerosus Kuntze (1891)
• Aster acradenius (Greene) Kuntze (1857)
• Aster acradenius (Greene) Kuntze (1891)
• Aster aculeatus Labill. (1806)
• Aster acuminatus Michx. (1803)= Oclemena acuminata (Michx.) Greene
• Aster acutidens Smyth (1899)
• Aster adelberti Kuntze (1899)
• Aster acutidens Smyth (1891)
• Aster adenolasius F.Muell. (1865)
• Aster adenolepis S.F.Blake (1940)
• Aster adenophorus (F.Muell.) F.Muell. (1865)
• Aster adnatus Nutt. (1834) = Symphyotrichum adnatum (Nutt.) G.L.Nesom
• Aster adscendens Reiche (1902)
• Aster ageratoides Turcz.
• Aster ageratoides subsp. yakushimensis Kitam. = Aster yakushimensis (Kitam.) Soejima & Yahara
• Aster ageratoides subsp. yoshinaganus Kitam. = Aster yoshinaganus (Kitam.) Mot. Ito & Soejima
• Aster ageratoides var. ageratoides
  syn.: Aster luxurifolius Tamamsch.
          Aster pensauensis Tamamsch.
          Aster see-burejensis Tamamsch.
          Aster suputinicus Tamamsch.
          Aster sutschanensis Kom.
          Aster trinervius subsp. ageratoides (Turcz.) Grierson
• Aster ageratoides var. firmus (Diels) Hand.-Mazz.
  syn.: Aster trinervius var. firmus Diels
• Aster ageratoides var. gerlachii (Hance) C. C. Chang ex Y.Ling
  syn.: Aster gerlachii Hance
• Aster ageratoides var. heterophyllus Maxim.
• Aster ageratoides var. intermedius (Soejima) Mot. Ito & Soejima
  syn.: Aster leiophyllus var. intermedius Soejima
• Aster ageratoides var. lasiocladus (Hayata) Hand.-Mazz.
  syn.: Aster lasiocladus Hayata
• Aster ageratoides var. laticorymbus (Vaniot) Hand.-Mazz.
  syn.: Aster laticorymbus Vaniot
• Aster ageratoides var. leiophyllus (Franch. & Sav.) Y.Ling
  syn.: Aster leiophyllus Franch. & Sav.
• Aster ageratoides var. micranthus Y.Ling
• Aster ageratoides var. ovalifolius Kitam.
• Aster ageratoides var. sawadanus Kitam.
• Aster ageratoides var. tenuifolius Kitam.
• Aster ageratoides var. yezoensis Kitam. & H. Hara = Aster microcephalus var. yezoensis (Kitam. & H. Hara) Soejima & Mot. Ito
• Aster alamani Kuntze (1891)
• Aster aitchisonii Boiss.
• Aster alatipes Hemsl.
• Aster albanicus (Degen) Degen (1926)
• Aster albescens (DC.) Hand.-Mazz.
• Aster albescens var. albescens
  syn.: Amphirhapis albescens DC.
        Microglossa albescens (DC.) Benth. ex C.B.Clarke
• Aster albescens var. discolor Y.Ling
• Aster albescens var. glandulosus Hand.-Mazz.
• Aster albescens var. gracilior Hand.-Mazz.
• Aster albescens var. levissimus Hand.-Mazz.
• Aster albescens var. limprichtii (Diels) Hand.-Mazz.
  syn.: Aster limprichtii Diels
• Aster albescens var. megaphyllus Y.Ling
• Aster albescens var. niveus Hand.-Mazz.
• Aster albescens var. pilosus Hand.-Mazz.
• Aster albescens var. rugosus Y.Ling
• Aster albescens var. salignus Hand.-Mazz.
• Aster albus (Nutt.) Eaton & Wright (1840)
• Aster alpigenus (Torr. & A.Gray) A.Gray = Oreostemma alpigenum var. alpigenum
• Aster alpigenus var. alpigenus = Oreostemma alpigenum var. alpigenum
• Aster alpigenus var. andersonii (A.Gray) M. Peck (1941)= Oreostemma alpigenum var. andresonii (A.Gray) G.L.Nesom
• Aster alpigenus var. haydenii (Porter) Cronquist = Oreostemma alpigenum var. haydenii (Porter) G.L.Nesom
• Aster alpinus L.
• Aster alpinus subsp. vierhapperi Onno = Aster alpinus var. vierhapperi (Onno) Cronquist
• Aster alpinus var. alpinus
  syn.: Aster alpinus var. dolomiticus (Beck) Onno
          Aster garibaldii Brügger
          Aster korshinskyi Tamamsch.
• Aster alpinus var. diversisquamus Y.Ling
• Aster alpinus var. dolomiticus (Beck) Onno = Aster alpinus var. alpinus
• Aster alpinus var. fallax (Tamamsch.) Y.Ling
  syn.: Aster fallax Tamamsch.
• Aster alpinus var. serpentimontanus (Tamamsch.) Y.Ling
  syn.: Aster serpentimontanus Tamamsch.
• Aster alpinus var. vierhapperi (Onno) Cronquist
  syn.: Aster alpinus subsp. vierhapperi Onno
• Aster altaicus Willd.= Heteropappus altaicus (Willd.) Novopokr.
• Aster amelloides Besser = Aster amellus L.
• Aster amellus L. (1753)
  syn.: Aster amelloides Besser
• Aster amellus subsp. amellus
  syn.: Aster bessarabicus Bernh. ex Rchb.
• Aster amellus subsp. ibericus (Steven) V.E.Avet.
  syn.: Aster ibericus Steven
• Aster amnicola E.S.Burgess (1906)
• Aster ananthocladus Hilliard & B.L.Burtt
• Aster andersonii (A.Gray) A.Gray = Oreostemma alpigenum var. andresonii (A.Gray) G.L.Nesom
• Aster andicola Hauman (1918)
  syn.: Aster bellidiastrum Nees ex Walp.
• Aster andinus Kuntze (1891)
  
• Aster andohahelensis Humbert
• Aster angustissimus Tausch = Aster sedifolius subsp. angustissimus (Tausch) Merxm.
• Aster annuus L. = Erigeron annuus (L.) Pers.
• Aster anomalus Engelm. = Symphyotrichum anomalum (Engelm.) G.L.Nesom
• Aster anticostensis Fernald = Symphyotrichum anticostense (Fernald) G.L.Nesom
• Aster aragonensis Asso
• Aster arenosus (A. Heller) S. F. Blake
  syn.: Leucelene arenosa A. Heller
• Aster argophyllus Labill. = Olearia argophylla (Labill.) F.Muell. ex Benth.
• Aster argyropholis Hand.-Mazz.
• Aster argyropholis var. argyropholis
• Aster argyropholis var. niveus Y.Ling
• Aster argyropholis var. paradoxus Y.Ling
• Aster asa-grayi Makino
• Aster ascendens Lindl. (1834)= Symphyotrichum ascendens (Lindl.) G.L.Nesom
• Aster ascendens var. parryi D.C.Eaton = Symphyotrichum foliaceum var. parryi (D.C.Eaton) G.L.Nesom
• Aster asteroides MacMill. (1892)
  syn.: Heterochaeta asteroides DC.
• Aster auriculatus Franch.
• Aster avitus Alexander (1939)= Eurybia avita (Alexander) G.L.Nesom
• Aster azureus Lindl. = Symphyotrichum oolentangiense (Riddell) G.L.Nesom
• Aster baccharoides (Benth.) Steetz
  syn.: Diplopappus baccharoides Benth.
• Aster bahamensis Britton = Symphyotrichum subulatum var. elongatum (Bosserdet ex A. G. Jones & Lowry) S. D. Sundb.
• Aster bakerianus Burtt Davy ex C. A. Sm.
• Aster baldwinii Torr. & A.Gray = Symphyotrichum undulatum (L.) G.L.Nesom
• Aster barbatus (DC.) Harv.
  syn.: Agathaea barbata DC.
• Aster barbellatus Grierson (1964)
• Aster baronii Humbert (1932)
• Aster batangensis Bureau & Franch.
• Aster batangensis var. batangensis
• Aster batangensis var. staticifolius (Franch.) Y.Ling
  syn.: Aster staticifolius Franch.
• Aster bellidiastrum (L.) Scop. = Bellidiastrum michelii Cass.
• Aster bellidiastrum Nees ex Walp. = Aster andicola Hauman
• Aster bellidioides Buch.-Ham. ex D.Don = Erigeron bellidioides (Buch.-Ham. ex D.Don) Benth. ex C.B.Clarke
• Aster bellus S. F. Blake = Chaetopappa ericoides (Torr.) G.L.Nesom
• Aster bernardinus H. M. Hall = Symphyotrichum defoliatum (Parish) G.L.Nesom
• Aster bessarabicus Bernh. ex Rchb. = Aster amellus subsp. amellus
• Aster bietii Franch.
• Aster bigelovii A.Gray = Machaeranthera bigelovii (A.Gray) Greene
• Aster bipinnatisectus Ludlow ex Grierson
• Aster xblakei (Porter) House = Oclemena xblakei (Porter) G.L.Nesom
• Aster blandus Pursh = Symphyotrichum puniceum var. puniceum
• Aster blepharophyllus A.Gray
• Aster boltoniae Greene = Psilactis asteroides A.Gray
• Aster borealis (Torr. & A.Gray) Prov. = Symphyotrichum boreale (Torr. & A.Gray) Á. Löve & D. Löve
• Aster bowiei Harv.
• Aster bracei Britton = Symphyotrichum bracei (Britton) G.L.Nesom
• Aster brachyactis S. F. Blake = Symphyotrichum ciliatum (Ledeb.) G.L.Nesom
• Aster brachytrichus Franch. (1896)
• Aster brachytrichus var. angustisquamus Y.Ling
• Aster brachytrichus var. brachytrichus
• Aster brachytrichus var. latifolius Y.Ling
• Aster brachytrichus var. tenuiligulatus Y.Ling
• Aster bracteolatus Nutt. = Symphyotrichum bracteolatum (Nutt.) G.L.Nesom
• Aster brevilingulatus (Sch.Bip. ex Hemsl.) McVaugh = Psilactis brevilingulata Sch.Bip. ex Hemsl.
• Aster brevis Hand.-Mazz.
• Aster breweri (A.Gray) J.C.Semple (1988) = Eucephalus breweri (A.Gray) G.L.Nesom
• Aster brickellioides Greene = Eucephalus brickellioides (Greene) G.L.Nesom
• Aster brickellioides var. glabratus Greene = Eucephalus glabratus (Greene) Greene
• Aster bullatus Klatt = Symphyotrichum bullatum (Klatt) G.L.Nesom
• Aster bulleyanus Jeffrey
• Aster burgessii Britton = Symphyotrichum burgessii (Britton) G.L.Nesom
• Aster burkei Howell (1900)
• Aster cabrerae Ariza = Symphyotrichum graminifolium (Spreng.) G.L.Nesom
• Aster calderi B. Boivin = Symphyotrichum puniceum var. calderi (B. Boivin) G.L.Nesom
• Aster calvatus (Baker) Herter (1930)= Noticastrum calvatum (Baker) Cuatrec.
• Aster campestris Nutt. (1840)= Symphyotrichum campestre (Nutt.) G.L.Nesom
• Aster canescens Pursh (1814)= Machaeranthera canescens (Pursh) A.Gray
• Aster canus Waldst. & Kit. = Aster sedifolius subsp. canus (Waldst. & Kit.) Merxm.
• Aster carnerosanus S. Watson = Symphyotrichum carnerosanum (S. Watson) G.L.Nesom
• Aster carolinianus Walter = Ampelaster carolinianus (Walter) G.L.Nesom
• Aster caucasicus Willd.
• Aster chapmanii Torr. & A.Gray = Eurybia chapmanii (Torr. & A.Gray) G.L.Nesom
• Aster chilensis Nees = Symphyotrichum chilense (Nees) G.L.Nesom
• Aster chilensis subsp. ascendens (Lindl.) Cronquist = Symphyotrichum ascendens (Lindl.) G.L.Nesom
• Aster chilensis subsp. chilensis = Symphyotrichum chilense (Nees) G.L.Nesom
• Aster chilensis subsp. hallii (A.Gray) Cronquist = Symphyotrichum hallii (A.Gray) G.L.Nesom
• Aster chimanimaniensis W. Lippert
• Aster chinensis L. = Callistephus chinensis (L.) Nees
• Aster chlorolepis E. S. Burgess = Eurybia chlorolepis (E. S. Burgess) G.L.Nesom
• Aster ciliolatus Lindl. = Symphyotrichum ciliolatum (Lindl.) Á. Löve & D. Löve
• Aster claytonii E. S. Burgess = Eurybia divaricata (L.) G.L.Nesom
• Aster coerulescens DC. = Symphyotrichum praealtum var. praealtum
• Aster colchicus Albov
• Aster commixtus auct. = Eurybia mirabilis (Torr. & A.Gray) G.L.Nesom
• Aster commixtus (Nees) Kuntze = Eurybia spectabilis (Aiton) G.L.Nesom
• Aster commutatus (Torr. & A.Gray) A.Gray = Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom
• Aster comptonii W. Lippert
• Aster concinnus Willd. = Symphyotrichum laeve var. concinnum (Willd.) G.L.Nesom
• Aster concolor L. = Symphyotrichum concolor (L.) G.L.Nesom
• Aster confertifolius Hilliard & B. L. Burtt
• Aster conspicuus Lindl. = Eurybia conspicua (Lindl.) G.L.Nesom
• Aster conyzae Griess. = Inula conyzae (Griess.) Meikle
• Aster cordifolius L. = Symphyotrichum cordifolium (L.) G.L.Nesom
• Aster coriaceus G. Forst. = Celmisia coriacea (G. Forst.) Hook. f.
• Aster crassulus Rydb. = Symphyotrichum falcatum var. falcatum
• Aster crenifolius (Fernald) Cronquist = Symphyotrichum crenifolium (Fernald) G.L.Nesom
• Aster creticus (Gand.) Rech. f.
  syn.: Galatella cretica Gand.
• Aster crocatus Bertol. = Lycoseris crocata (Bertol.) S. F. Blake
• Aster curtisii Torr. & A.Gray = Symphyotrichum retroflexum (Lindl.) G.L.Nesom
• Aster curtus Cronquist
• Aster cusickii A.Gray = Symphyotrichum cusickii (A.Gray) G.L.Nesom
• Aster cusickii var. lyallii A.Gray = Symphyotrichum hendersonii (Fernald) G.L.Nesom
• Aster defoliatus Parish = Symphyotrichum defoliatum (Parish) G.L.Nesom
• Aster depauperatus Fernald = Symphyotrichum depauperatum (Fernald) G.L.Nesom
• Aster dimorphophyllus Franch. & Sav. = Doellingeria dimorphophylla (Franch. & Sav.) G.L.Nesom
• Aster diplostephioides (DC.) C.B.Clarke
  syn.: Heterochaeta diplostephioides DC.
• Aster diplostephioides var. falconeri C.B.Clarke = Aster falconeri subsp. falconeri
• Aster divaricatus L. (1753)= Eurybia divaricata (L.) G.L.Nesom
• Aster dolichophyllus Y.Ling
• Aster dolichopodus Y.Ling
• Aster dracunculoides Lam. = Aster sedifolius subsp. dracunculoides (Lam.) Merxm.
• Aster drummondii Lindl. = Symphyotrichum drummondii (Lindl.) G.L.Nesom
• Aster dumosus L. = Symphyotrichum dumosum (L.) G.L.Nesom
• Aster eatonii (A.Gray) Howell = Symphyotrichum bracteolatum (Nutt.) G.L.Nesom
• Aster elatus (Greene) Cronquist = Oreostemma elatum (Greene) Greene
• Aster elegans var. engelmannii D. C. Eaton = Eucephalus engelmannii (D.C.Eaton) Greene
• Aster elliottii Torr. & A.Gray = Symphyotrichum elliottii (Torr. & A.Gray) G.L.Nesom
• Aster engelmannii (D. C. Eaton) A.Gray = Eucephalus engelmannii (D. C. Eaton) Greene
• Aster engelmannii var. glaucescens A.Gray = Eucephalus glaucescens (A.Gray) Greene
• Aster engelmannii var. ledophyllus A.Gray = Eucephalus ledophyllus (A.Gray) Greene
• Aster engelmannii var. paucicapitatus B. L. Rob. = Eucephalus paucicapitatus (B. L. Rob.) Greene
• Aster ericoides L. = Symphyotrichum ericoides (L.) G.L.Nesom
• Aster ericoides var. commutatus (Torr. & A.Gray) B. Boivin = Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom
• Aster ericoides var. parviceps E.S.Burgess = Symphyotrichum parviceps (E.S.Burgess) G.L.Nesom
• Aster ericoides var. platyphllus Torr. & A.Gray = Symphyotrichum pilosum var. pilosum
• Aster ericoides var. pringlei A.Gray = Symphyotrichum pilosum var. pringlei (A.Gray) G.L.Nesom
• Aster erigeroides (DC.) Harv. = Felicia erigeroides DC.
• Aster erubescens Sieber ex Spreng.= Olearia erubescens (Sieber ex Spreng.) Dippel
• Aster erucifolius (Thell.) W. Lippert
  syn.: Felicia erucifolia Thell.
• Aster eryngiifolius Torr. & A.Gray = Eurybia eryngiifolia (Torr. & A.Gray) G.L.Nesom
• Aster eulae Shinners = Symphyotrichum eulae (Shinners) G.L.Nesom
• Aster exilis Elliott = Symphyotrichum subulatum (Michx.) G.L.Nesom
• Aster exscapus Richardson = Townsendia exscapa (Richardson) Porter
• Aster falcatus Lindl. = Symphyotrichum falcatum var. falcatum
• Aster falcatus var. commutatus (Torr. & A.Gray) A. G. Jones = Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom
• Aster falcifolius Hand.-Mazz.
• Aster falconeri (C.B.Clarke) Hutch.
• Aster falconeri subsp. falconeri
  syn.: Aster diplostephioides var. falconeri C.B.Clarke
• Aster falconeri subsp. nepalensis Grierson
• Aster fallax Tamamsch. = Aster alpinus var. fallax (Tamamsch.) Y.Ling
• Aster fanjingshanicus Y. L. Chen & D. J. Liu
• Aster farreri W. W. Sm. & Jeffrey
• Aster fauriei H. Lév. & Vaniot = Aster spathulifolius Maxim.
• Aster faxonii Porter = Symphyotrichum pilosum var. pringlei (A.Gray) G.L.Nesom
• Aster fendleri A.Gray = Symphyotrichum fendleri (A.Gray) G.L.Nesom
• Aster filifolius Vent. = Felicia filifolia (Vent.) Burtt Davy
• Aster filipes J. Q. Fu
• Aster firmus Nees = Symphyotrichum firmum (Nees) G.L.Nesom
• Aster flaccidus Bunge
• Aster flaccidus subsp. flaccidus
• Aster flaccidus subsp. glandulosus (Keissl.) Onno
  syn.: Aster flaccidus var. glandulosus Keissl.
• Aster flaccidus subsp. tsarungensis Grierson = Aster tsarungensis (Grierson) Y.Ling
• Aster flaccidus var. flaccidus
  syn.: Aster heterochaeta Benth. ex C.B.Clarke
          Aster tibeticus Hook. f.
        Erigeron heterochaeta (Benth. ex C.B.Clarke) Botsch.
• Aster flaccidus var. glandulosus Keissl. = Aster flaccidus subsp. glandulosus (Keissl.) Onno
• Aster flaccidus var. griseo-barbatus Grierson
• Aster flexilis E. S. Burgess = Eurybia divaricata (L.) G.L.Nesom
• Aster foliaceus Lindl. = Symphyotrichum foliaceum var. foliaceum
• Aster foliaceus var. apricus A.Gray = Symphyotrichum foliaceum var. apricum (A.Gray) G.L.Nesom
• Aster foliaceus var. canbyi A.Gray = Symphyotrichum foliaceum var. canbyi (A.Gray) G.L.Nesom
• Aster foliaceus var. crenifolius Fernald = Symphyotrichum crenifolium (Fernald) G.L.Nesom
• Aster foliaceus var. cusickii (A.Gray) Cronquist = Symphyotrichum cusickii (A.Gray) G.L.Nesom
• Aster foliaceus var. eatonii A.Gray = Symphyotrichum bracteolatum (Nutt.) G.L.Nesom
• Aster foliaceus var. foliaceus = Symphyotrichum foliaceum var. foliaceum
• Aster foliaceus var. lyallii (A.Gray) Cronquist = Symphyotrichum hendersonii (Fernald) G.L.Nesom
• Aster foliaceus var. parryi (D.C.Eaton) A.Gray = Symphyotrichum foliaceum var. parryi (D.C.Eaton) G.L.Nesom
• Aster foliaceus var. subgeminatus Fernald = Symphyotrichum subgeminatum (Fernald) G.L.Nesom
• Aster fontinalis Alexander = Symphyotrichum fontinale (Alexander) G.L.Nesom
• Aster formosanus Hayata
• Aster fragilis auct. = Symphyotrichum racemosum (Elliott) G.L.Nesom
• Aster xfrikartii Silva Tar. & C.K.Schneid.= Aster amellus x A. thomsonii
• Aster frondosus (Nutt.) Torr. & A.Gray = Symphyotrichum frondosum (Nutt.) G.L.Nesom
• Aster frutescens S. Watson (1836)
• Aster fruticosus L. = Felicia fruticosa (L.) G.Nicholson
• Aster fulgidulus Grierson
• Aster furcatus E.S.Burgess (1898) = Eurybia furcata (E.S.Burgess) G.L.Nesom
• Aster furfuraceus A.Rich. = Olearia furfuracea (A.Rich.) Hook.f.
• Aster fuscescens Bureau & Franch.
• Aster fuscescens var. fuscescens
• Aster fuscescens var. oblongifolius Grierson
• Aster fuscescens var. scaberoides C.C.Chang
• Aster garibaldii Brügger = Aster alpinus var. alpinus
• Aster gentryi Standl. = Psilactis gentryi (Standl.) D.R.Morgan
• Aster georgianus Alexander = Symphyotrichum georgianum (Alexander) G.L.Nesom
• Aster gerlachii Hance = Aster ageratoides var. gerlachii (Hance) C.C.Chang ex Y.Ling
• Aster giraldii Diels
• Aster glabrifolius (DC.) Reiche = Symphyotrichum glabrifolium (DC.) G.L.Nesom
• Aster glaucescens (A.Gray) S. F. Blake = Eucephalus glaucescens (A.Gray) Greene
• Aster glaucodes S. F. Blake = Eurybia glauca (Nutt.) G.L.Nesom
• Aster glaucodes subsp. pulcher S. F. Blake = Eurybia pulchra (S. F. Blake) G.L.Nesom
• Aster glaucus var. wasatchensis M.E.Jones = Eurybia wasatchensis (M.E.Jones) G.L.Nesom
• Aster glehnii F. Schmidt
• Aster gormanii (Piper) S. F. Blake = Eucephalus gormanii Piper
• Aster gracilicaulis Y.Ling
• Aster gracilis Nutt. (1818)= Eurybia compacta G.L.Nesom
• Aster grandiflorus L. = Symphyotrichum grandiflorum (L.) G.L.Nesom
• Aster greatae Parish = Symphyotrichum greatae (Parish) G.L.Nesom
• Aster grisebachii Britton
• Aster gymnocephalus (DC.) A.Gray
  syn.: Haplostachys gymnocephalus DC.
• Aster gypsophilus B. L. Turner = Symphyotrichum gypsophilum (B. L. Turner) G.L.Nesom
• Aster hallii A.Gray = Symphyotrichum hallii (A.Gray) G.L.Nesom
• Aster handelii Onno
• Aster harveyanus Kuntze
• Aster hayatae H. Lév. & Vaniot
• Aster haydenii Porter = Oreostemma alpigenum var. haydenii (Porter) G.L.Nesom
• Aster heliopsis Grierson
• Aster hemisphericus Alexander = Eurybia hemispherica (Alexander) G.L.Nesom
• Aster hendersonii Fernald = Symphyotrichum hendersonii (Fernald) G.L.Nesom
• Aster hersileoides C. K. Schneid.
• Aster hesperius A.Gray = Symphyotrichum lanceolatum subsp. hesperium (A.Gray) G.L.Nesom
• Aster heterochaeta Benth. ex C.B.Clarke = Aster flaccidus var. flaccidus
• Aster heterolepis Hand.-Mazz.
• Aster himalaicus C.B.Clarke
• Aster hintonii G.L.Nesom = Symphyotrichum hintonii (G.L.Nesom) G.L.Nesom
• Aster hirsuticaulis Lindl. = Symphyotrichum lateriflorum var. hirsuticaule (Lindl.) G.L.Nesom
• Aster hispidus Thunb. = Heteropappus hispidus (Thunb.) Less. Aster hololachnus Y.Ling
• Aster holophyllus Hemsl. = Kalimeris integrifolia Turcz. ex DC.
• Aster holosericeus G. Forst. = Celmisia holosericea (G. Forst.) Hook. f.
• Aster homochlamydeus Hand.-Mazz.
• Aster horridus (Wooton & Standl.) S. F. Blake = Eurybia horrida (Wooton & Standl.) G.L.Nesom
• Aster huegelii F. Muell. = Olearia ciliata (Benth.) F. Muell.
• Aster hunanensis Hand.-Mazz.
• Aster hybridus var. luteus hort. = xSolidaster luteus (Everett) M. L. Green ex Dress
• Aster hypoleucus Hand.-Mazz.
• Aster ibericus Steven = Aster amellus subsp. ibericus (Steven) V. E. Avet.
• Aster iinumae Kitam. ex H. Hara
• Aster incisus var. yomena Kitam. = Aster yomena (Kitam.) Honda
• Aster indamellus Grierson
• Aster infirmus Michx. = Doellingeria infirma (Michx.) Greene
• Aster integrifolius Nutt. = Eurybia integrifolia (Nutt.) G.L.Nesom
• Aster interior Wiegand = Symphyotrichum lanceolatum var. interior (Wiegand) G.L.Nesom
• Aster intricatus (A.Gray) S. F. Blake
  syn.: Bigelowia intricata A.Gray
• Aster ionoglossus Y.Ling
• Aster itsunboshi Kitam.
• Aster jeffreyanus Diels
• Aster jessicae Piper = Symphyotrichum jessicae (Piper) G.L.Nesom
• Aster jonesiae Lamboy = Eurybia jonesiae (Lamboy) G.L.Nesom
• Aster juchaihu Z. Y. Zhu & B. Q. Min
• Aster junciformis Rydb. = Symphyotrichum boreale (Torr. & A.Gray) Á. Löve & D. Löve
• Aster kantoensis Kitam.
• Aster komonoensis Makino = Doellingeria komonoensis (Makino) G.L.Nesom
• Aster koraiensis Nakai
• Aster korshinskyi Tamamsch. = Aster alpinus var. alpinus
• Aster labrangensis Hand.-Mazz. = Aster yunnanensis var. labrangensis (Hand.-Mazz.) Y.Ling
• Aster laevigatus (Sond.) Kuntze
  syn.: Diplopappus laevigatus Sond.
• Aster laevis L. = Symphyotrichum laeve var. laeve
• Aster laevis var. geyeri A.Gray = Symphyotrichum laeve var. geyeri (A.Gray) G.L.Nesom
• Aster laevis var. laevis = Symphyotrichum laeve var. laeve
• Aster laka C.B.Clarke
• Aster lanceolatus Willd. = Symphyotrichum lanceolatum var. lanceolatum
• Aster langaoensis J. Q. Fu
• Aster lanuginosus (Small) Y.Ling
  syn.: Wardaster lanaginosus Small
• Aster lasiocladus Hayata = Aster ageratoides var. lasiocladus (Hayata) Hand.-Mazz.
• Aster lateriflorus (L.) Britton = Symphyotrichum lateriflorum var. lateriflorum
• Aster lateriflorus var. flagellaris Shinners = Symphyotrichum lateriflorum var. flagellare (Shinners) G.L.Nesom
• Aster lateriflorus var. hirsuticaulis (Lindl.) Porter = Symphyotrichum lateriflorum var. hirsuticaule (Lindl.) G.L.Nesom
• Aster lateriflorus var. indutus Shinners = Symphyotrichum lateriflorum var. flagellare (Shinners) G.L.Nesom
• Aster lateriflorus var. tenuipes Wiegand = Symphyotrichum lateriflorum var. tenuipes (Wiegand) G.L.Nesom
• Aster latibracteatus Franch.
• Aster laticorymbus Vaniot = Aster ageratoides var. laticorymbus (Vaniot) Hand.-Mazz.
• Aster laurentianus Fernald = Symphyotrichum laurentianum (Fernald) G.L.Nesom
• Aster lautureanus (Debeaux) Franch. = Boltonia lautureana Debeaux
• Aster lavanduliifolius Hand.-Mazz.
• Aster laxiflorus var. borealis Torr. & A.Gray = Symphyotrichum boreale (Torr. & A.Gray) Á. Löve & D. Löve
• Aster ledophyllus (A.Gray) A.Gray = Eucephalus ledophyllus (A.Gray) Greene
• Aster leiodes S. F. Blake = Machaeranthera canescens (Pursh) A.Gray
• Aster leiophyllus Franch. & Sav. = Aster ageratoides var. leiophyllus (Franch. & Sav.) Y.Ling
• Aster leiophyllus var. intermedius Soejima = Aster ageratoides var. intermedius (Soejima) Mot. Ito & Soejima
• Aster lemmonii A.Gray = Symphyotrichum potosinum (A.Gray) G.L.Nesom
• Aster lentus Greene = Symphyotrichum lentum (Greene) G.L.Nesom
• Aster leonis Britton (1920)= Symphyotrichum leone (Britton) G.L.Nesom
• Aster likiangensis Franch.
• Aster limosus Hemsl.
• Aster limprichtii Diels = Aster albescens var. limprichtii (Diels) Hand.-Mazz.
• Aster linariifolius L. = Ionactis linariifolia (L.) Greene
• Aster lindleyanus Torr. & A.Gray = Symphyotrichum ciliolatum (Lindl.) Á. Löve & D. Löve
• Aster lingulatus Franch.
• Aster linosyris (L.) Bernh.
  syn.: Chrysocoma linosyris L.
• Aster lipskyi Kom.
• Aster liratus Sims = Olearia lirata (Sims) Hutch.
• Aster longifolius Lam. (1783) = Symphyotrichum longifolium (Lam.) G.L.Nesom
• Aster longipetiolatus C. C. Chang = Doellingeria longipetiolata (C. C. Chang) G.L.Nesom
• Aster lowrieanus Porter = Symphyotrichum lowrieanum (Porter) G.L.Nesom
• Aster lucayanus Britton = Symphyotrichum lucayanum (Britton) G.L.Nesom
• Aster lucidulus (A.Gray) Wiegand (1924) = Symphyotrichum firmum (Nees) G.L.Nesom
• Aster luxurifolius Tamamsch. = Aster ageratoides var. ageratoides
• Aster luzonensis Elmer
• Aster lydenburgensis W. Lippert
• Aster maackii Regel
• Aster macrophyllus L. = Eurybia macrophylla (L.) Cass. ex Nees
• Aster madagascariensis Humbert
• Aster magnus Y. N. Lee & C. Kim
• Aster mandrarensis Humbert
• Aster mangshanensis Y.Ling
• Aster marchandii H. Lév. = Doellingeria marchandii (H. Lév.) Y.Ling
• Aster martii Baker = Symphyotrichum martii (Baker) G.L.Nesom
• Aster megalanthus Y.Ling
• Aster menelii H. Lév.
• Aster meritus A. Nelson = Eurybia merita (A. Nelson) G.L.Nesom
• Aster microcephalus (Miq.) Franch. & Sav.
• Aster microcephalus var. microcephalus
  syn.: Aster ovatus var. microcephalus (Miq.) Mot. Ito & Soejima
          Calimeris microcephalus Miq.
• Aster microcephalus var. ovatus (Franch. & Sav.) Soejima & Mot. Ito
  syn.: Aster ovatus (Franch. & Sav.) Mot. Ito & Soejima
• Aster ovatus var. ovatus
• Aster trinervius var. ovatus Franch. & Sav.
• Aster microcephalus var. ripensis Makino
  syn.: Aster ovatus var. ripensis (Makino) Mot. Ito & Soejima
• Aster microcephalus var. yezoensis (Kitam. & H. Hara) Soejima & Mot. Ito
  syn.: Aster ageratoides var. yezoensis Kitam. & H. Hara
• Aster ovatus var. yezoensis (Kitam. & H. Hara) Mot. Ito & Soejima
• Aster milanjiensis S. Moore
• Aster minor Kuntze = Solidago parryi (A.Gray) Greene
• Aster miquelianus H. Hara = Doellingeria japonica (Miq.) G.L.Nesom
• Aster mirabilis Torr. & A.Gray = Eurybia mirabilis (Torr. & A.Gray) G.L.Nesom
• Aster miyagii Koidz.
• Aster modestus Lindl. = Canadanthus modestus (Lindl.) G.L.Nesom
• Aster mohrii E. S. Burgess = Symphyotrichum undulatum (L.) G.L.Nesom
• Aster mollis Rydb. = Symphyotrichum molle (Rydb.) G.L.Nesom
• Aster molliusculus (Lindl.) C.B.Clarke
• Aster molliusculus var. minor Grierson
• Aster molliusculus var. molliusculus
  syn.: Diplopappus molliusculus Lindl.
• Aster mongolicus Franch. = Kalimeris mongolica (Franch.) Kitam.
• Aster moranensis Kunth (1820) = Symphyotrichum moranense (Kunth) G.L.Nesom
• Aster morrisonensis Hayata
• Aster motuoensis Y. L. Chen
• Aster moupinsensis (Franch.) Hand.-Mazz.
  syn.: Erigeron moupinensis Franch.
• Aster multiflorus Aiton (1789) = Symphyotrichum ericoides (L.) G.L.Nesom
• Aster multiflorus var. commutatus Torr. & A.Gray = Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom
• Aster multiflorus var. pansus S. F. Blake = Symphyotrichum ericoides (L.) G.L.Nesom
• Aster myrsinoides Labill. = Olearia myrsinoides (Labill.) F. Muell. ex Benth.
• Aster nebraskensis Britton = Symphyotrichum praealtum var. praealtum
• Aster nemoralis Aiton = Oclemena nemoralis (Aiton) Greene
• Aster nemoralis var. blakei Porter = Oclemena xblakei (Porter) G.L.Nesom
• Aster neoelegans Grierson
• Aster neomexicanus Wooton & Standl. = Symphyotrichum subulatum var. ligulatum (Shinners) S. D. Sundb.
• Aster nigromontanus Dunn
• Aster nitidus C. C. Chang
• Aster novae-angliae L. = Symphyotrichum novae-angliae (L.) G.L.Nesom
• Aster novi-belgii L. = Symphyotrichum novi-belgii (L.) G.L.Nesom
• Aster nubimontis W. Lippert
• Aster oblongifolius Nutt. = Symphyotrichum oblongifolium (Nutt.) G.L.Nesom
• Aster occidentalis (Nutt.) Torr. & A.Gray = Symphyotrichum spathulatum var. spathulatum
• Aster occidentalis var. intermedius A.Gray = Symphyotrichum spathulatum var. intermedium (A.Gray) G.L.Nesom
• Aster oleifolius (Lam.) Wagenitz
  syn.: Conyza oleifolia Lam.
• Aster ontarionis Wiegand = Symphyotrichum ontarione (Wiegand) G.L.Nesom
• Aster oolentangiensis Riddell = Symphyotrichum oolentangiense (Riddell) G.L.Nesom
• Aster oregonensis (Nutt.) Cronquist = Sericocarpus oregonensis Nutt.
• Aster oreophilus Franch.
• Aster ovalifolius Kitam.
• Aster ovatus (Franch. & Sav.) Mot. Ito & Soejima = Aster microcephalus var. ovatus (Franch. & Sav.) Soejima & Mot. Ito
• Aster ovatus var. microcephalus (Miq.) Mot. Ito & Soejima = Aster microcephalus var. microcephalus
• Aster ovatus var. ovatus = Aster microcephalus var. ovatus (Franch. & Sav.) Soejima & Mot. Ito
• Aster ovatus var. ripensis (Makino) Mot. Ito & Soejima = Aster microcephalus var. ripensis Makino
• Aster ovatus var. yezoensis (Kitam. & H. Hara) Mot. Ito & Soejima= Aster microcephalus var. yezoensis (Kitam. & H. Hara) Soejima & Mot. Ito
• Aster palmeri A.Gray = Neonesomia palmeri (A.Gray) Urbatsch & R. P. Roberts
• Aster paludosus Aiton = Eurybia paludosa (Aiton) G.L.Nesom
• Aster paludosus subsp. hemisphericus (Alexander) Cronquist = Eurybia hemispherica (Alexander) G.L.Nesom
• Aster paludosus subsp. paludosus = Eurybia paludosa (Aiton) G.L.Nesom
• Aster panduratus Nees ex Walp.
• Aster paniculatus Lam. = Symphyotrichum lanceolatum var. lanceolatum
• Aster pannonicus Jacq. = Aster tripolium subsp. pannonicus (Jacq.) Soó
• Aster pansus (S. F. Blake) Cronquist = Symphyotrichum ericoides (L.) G.L.Nesom
• Aster parryi A.Gray = Xylorhiza glabriuscula Nutt.
• Aster parviceps (E. S. Burgess) Mack. & Bush = Symphyotrichum parviceps (E. S. Burgess) G.L.Nesom
• Aster patagonicus Cabrera = Symphyotrichum patagonicum (Cabrera) G.L.Nesom
• Aster patens Aiton (1789)= Symphyotrichum patens var. patens
• Aster patens var. georgianus (Alexander) Cronquist = Symphyotrichum georgianum (Alexander) G.L.Nesom
• Aster patens var. gracilis Hook. = Symphyotrichum patens var. gracile (Hook.) G.L.Nesom
• Aster patens var. patens = Symphyotrichum patens var. patens
• Aster patens var. patentissimus (Lindl.) Torr. & A.Gray = Symphyotrichum patens var. patentissimum (Lindl.) G.L.Nesom
• Aster patens var. phlogifolius (Muhl. ex Willd.) Nees = Symphyotrichum phlogifolium (Muhl. ex Willd.) G.L.Nesom
• Aster patentissimus Lindl. = Symphyotrichum patens var. patentissimum (Lindl.) G.L.Nesom
• Aster paternus Cronquist = Sericocarpus asteroides (L.) Britton et al.
• Aster patulus Lam.
• Aster paucicapitatus (B. L. Rob.) B. L. Rob. = Eucephalus paucicapitatus (B. L. Rob.) Greene
• Aster paucidentatus F. Muell. = Olearia paucidentata (F. Muell.) F. Muell.
• Aster pauciflorus Nutt. = Almutaster pauciflorus (Nutt.) Á. Löve & D. Löve
• Aster peduncularis Wall. ex Nees
• Aster peglerae Bolus
• Aster peirsonii Sharsm. = Oreostemma peirsonii (Sharsm.) G.L.Nesom
• Aster pensauensis Tamamsch. = Aster ageratoides var. ageratoides
• Aster peregrinus Pursh = Erigeron peregrinus (Pursh) Greene
• Aster perelegans A. Nelson & J. F. Macbr. = Eucephalus elegans Nutt.
• Aster perfoliatus Oliv.
• Aster peteroanus Phil. = Symphyotrichum peteroanum (Phil.) G.L.Nesom
• Aster philippinensis S. Moore
• Aster phlogifolius Muhl. ex Willd. = Symphyotrichum phlogifolium (Muhl. ex Willd.) G.L.Nesom
• Aster phlogopappus Labill. = Olearia phlogopappa var. phlogopappa
• Aster phyllolepis Torr. & A.Gray = Symphyotrichum pratense (Raf.) G.L.Nesom
• Aster pilosus Willd. = Symphyotrichum pilosum var. pilosum
• Aster pilosus var. demotus S. F. Blake = Symphyotrichum pilosum var. pringlei (A.Gray) G.L.Nesom
• Aster pilosus var. pilosus = Symphyotrichum pilosum var. pilosum
• Aster pilosus var. platyphyllus (Torr. & A.Gray) S. F. Blake = Symphyotrichum pilosum var. pilosum
• Aster pilosus var. priceae (Britton) Cronquist = Symphyotrichum priceae (Britton) G.L.Nesom
• Aster pilosus var. pringlei (A.Gray) S. F. Blake = Symphyotrichum pilosum var. pringlei (A.Gray) G.L.Nesom
• Aster platylepis Y. L. Chen
  syn.: Doronicum latisquamatum C. E. C. Fisch.
• Aster pleiocephalus (Harv.) Hutch.
  syn.: Diplopappus asper var. pleiocephalus Harv.
• Aster poliothamnus Diels
• Aster polius C. K. Schneid.
• Aster porteri A.Gray = Symphyotrichum porteri (A.Gray) G.L.Nesom
• Aster potosinus A.Gray = Symphyotrichum potosinum (A.Gray) G.L.Nesom
• Aster praealtus Poir. = Symphyotrichum praealtum var. praealtum
• Aster praealtus var. angustior Wiegand = Symphyotrichum praealtum var. angustior (Wiegand) G.L.Nesom
• Aster praealtus var. coerulescens (DC.) A.G.Jones = Symphyotrichum praealtum var. praealtum
• Aster praealtus var. nebraskensis (Britton) Wiegand = Symphyotrichum praealtum var. praealtum
• Aster praealtus var. praealtus = Symphyotrichum praealtum var. praealtum
• Aster prainii (J. R. Drumm.) Y. L. Chen
  syn.: Chlamydites prainii J. R. Drumm.
• Aster pratensis Raf. = Symphyotrichum pratense (Raf.) G.L.Nesom
• Aster prenanthoides Muhl. ex Willd. = Symphyotrichum prenanthoides (Muhl. ex Willd.) G.L.Nesom
• Aster priceae Britton = Symphyotrichum priceae (Britton) G.L.Nesom
• Aster pringlei (A.Gray) Britton = Symphyotrichum pilosum var. pringlei (A.Gray) G.L.Nesom
• Aster prorerus Hemsl.
• Aster pseudobakerianus W. Lippert
• Aster ptarmicoides Torr. & A.Gray = Solidago ptarmicoides (Torr. & A.Gray) B.Boivin
• Aster pubentior Cronquist
• Aster punctatus Waldst. & Kit.
  syn.: Galatella punctata (Waldst. & Kit.) Nees
• Aster puniceus L. (1753) Symphyotrichum puniceum var. puniceum
• Aster puniceus var. calderi (B. Boivin) Lepage = Symphyotrichum puniceum var. calderi (B. Boivin) G.L.Nesom
• Aster puniceus var. demissus Lindl. = Symphyotrichum puniceum var. puniceum
• Aster puniceus var. elliottii (Torr. & A.Gray) A.G.Jones = Symphyotrichum elliottii (Torr. & A.Gray) G.L.Nesom
• Aster puniceus var. firmus (Nees) Torr. & A.Gray = Symphyotrichum firmum (Nees) G.L.Nesom
• Aster puniceus var. lucidulus A.Gray = Symphyotrichum firmum (Nees) G.L.Nesom
• Aster puniceus var. puniceus = Symphyotrichum puniceum var. puniceum
• Aster puniceus var. scabricaulis (Shinners) A.G.Jones = Symphyotrichum puniceum var. scabricaule (Shinners) G.L.Nesom
• Aster pycnophyllus W. W. Sm.
• Aster pygmaeus Lindl. = Eurybia pygmaea (Lindl.) G.L.Nesom
• Aster pyrenaeus Desf. ex DC.
• Aster quitensis Willd. ex Spreng.
• Aster racemosus Elliott = Symphyotrichum racemosum (Elliott) G.L.Nesom
• Aster radula Aiton = Eurybia radula (Aiton) G.L.Nesom
• Aster radulinus A.Gray = Eurybia radulinus (A.Gray) G.L.Nesom
• Aster ramulosus Labill. = Olearia ramulosa (Labill.) Benth.
• Aster regnellii Baker = Symphyotrichum regnellii (Baker) G.L.Nesom
• Aster reticulatus Pursh = Oclemena reticulata (Pursh) G.L.Nesom
• Aster retroflexus Lindl. = Symphyotrichum retroflexum (Lindl.) G.L.Nesom
• Aster retusus Ludlow
• Aster richardsonii Spreng. (1826)= Eurybia sibirica (L.) G.L.Nesom
• Aster riparius Kunth
• Aster rockianus Hand.-Mazz.
• Aster rotundifolius Thunb. = Felicia amelloides (L.) Voss
• Aster rugosus Kuntze (1891)
• Aster rugulosus Maxim. = Doellingeria rugulosa (Maxim.) G.L.Nesom
• Aster saboureaui Humbert
• Aster sagittifolius Wedem. ex Willd. = Symphyotrichum sagittifolium (Wedem. ex Willd.) G.L.Nesom
• Aster xsalignus Willd. = Symphyotrichum xsalignum (Willd.) G.L.Nesom
• = A. lanceolatus x A. novi-belgii
• Aster salwinensis Onno
• Aster sampsonii (Hance) Hemsl.
• Aster sampsonii var. isochaetus C. C. Chang
• Aster sampsonii var. sampsonii
  syn.: Heteropappus sampsonii Hance
• Aster satsumensis Soejima
• Aster savatieri Makino
• Aster saxicastellii J.J.N.Campb. & Medley = Eurybia saxicastellii (J.J.N.Campb. & Medley) G.L.Nesom
• Aster scaber Thunb. = Doellingeria scabra (Thunb.) Nees
• Aster scabricaulis Shinners = Symphyotrichum puniceum var. scabricaule (Shinners) G.L.Nesom
• Aster schaffneri Sch.Bip. ex S. D. Sundb. & A.G.Jones
• = Symphyotrichum schaffneri (Sch.Bip. ex S. D. Sundb. & A.G.Jones) G.L.Nesom
• Aster schreberi Nees
• = Eurybia schreberi (Nees) Nees
• Aster scopulorum A.Gray
• = Ionactis alpina (Nutt.) Greene
• Aster sedifolius L.
• Aster sedifolius subsp. angustissimus (Tausch) Merxm.
  syn.: Aster angustissimus Tausch
• Aster sedifolius subsp. canus (Waldst. & Kit.) Merxm.
  syn.: Aster canus Waldst. & Kit.
• Aster sedifolius subsp. dracunculoides (Lam.) Merxm.
  syn.: Aster dracunculoides Lam.
• Aster sedifolius subsp. illyricus (Murb.) Merxm.
  syn.: Galatella rigida subsp. illyrica Murb.
• Aster sedifolius subsp. sedifolius
  syn.: Aster acris L.
• Aster sedifolius subsp. trinervis (Pers.) Thell.
  syn.: Aster acris var. trinervis Pers.
• Aster see-burejensis Tamamsch. = Aster ageratoides var. ageratoides
• Aster semiamplexicaulis Makino ex Koidz.
• Aster senecioides Franch.
• Aster senecioides var. latisquamus Y.Ling
• Aster senecioides var. senecioides
• Aster sericeus Vent.= Symphyotrichum sericeum (Vent.) G.L.Nesom
• Aster sericeus var. microphyllus DC.= Symphyotrichum pratense (Raf.) G.L.Nesom
• Aster sericocarpoides (Small) K. Schum. = Doellingeria sericocarpoides Small
• Aster serpentimontanus Tamamsch. = Aster alpinus var. serpentimontanus (Tamamsch.) Y.Ling
• Aster shastensis (A.Gray) A.Gray
  syn.: Machaeranthera shastensis A.Gray
• Aster shortii Lindl. = Symphyotrichum shortii (Lindl.) G.L.Nesom
• Aster sibiricus L. (1753) = Eurybia sibirica (L.) G.L.Nesom
• Aster sibiricus var. subintegerrima Trautv. = Eurybia sibirica (L.) G.L.Nesom
• Aster sikkimensis Hook.
• Aster sikuensis W. W. Sm. & Farrer
• Aster simmondsii Small = Symphyotrichum simmondsii (Small) G.L.Nesom
• Aster simplex Willd. (1809) = Symphyotrichum lanceolatum var. lanceolatum
• Aster simplex var. interior (Wiegand) Cronquist = Symphyotrichum lanceolatum var. interior (Wiegand) G.L.Nesom
• Aster simplex var. ramosissimus (Torr. & A.Gray) Cronquist = Symphyotrichum lanceolatum var. lanceolatum
• Aster simplex var. simplex = Symphyotrichum lanceolatum var. lanceolatum
• Aster sinianus Hand.-Mazz.
• Aster smithianus Hand.-Mazz.
• Aster sodiroi Hieron.
• Aster sohayakiensis Koidz. = Doellingeria sohayakiensis (Koidz.) G.L.Nesom
• Aster solidagineus Michx. = Sericocarpus linifolius (L.) Britton et al.
• Aster souliei Franch.
• Aster spathulatus Lindl. = Symphyotrichum spathulatum var. spathulatum
• Aster spathulatus var. intermedius (A.Gray) Cronquist = Symphyotrichum spathulatum var. intermedium (A.Gray) G.L.Nesom
• Aster spathulatus var. spathulatus = Symphyotrichum spathulatum var. spathulatum
• Aster spathulifolius Maxim.
  syn.: Aster fauriei H. Lév. & Vaniot
• Aster spectabilis Aiton = Eurybia spectabilis (Aiton) G.L.Nesom
• Aster sphaerotus Y.Ling
• Aster spinosus Benth. = Chloracantha spinosa (Benth.) G.L.Nesom
• Aster spinulosus Chapm. = Eurybia spinulosa (Chapm.) G.L.Nesom
• Aster squamatus (Spreng.) Hieron. (1900)= Symphyotrichum subulatum var. squamatum (Spreng.) S.D.Sundb.
• Aster squamatus var. graminifolius (Spreng.) Hieron. (1900) = Symphyotrichum graminifolium (Spreng.) G.L.Nesom
• Aster staticifolius Franch. = Aster batangensis var. staticifolius (Franch.) Y.Ling
• Aster steeleorum Shinners
• Aster stenomeres A.Gray = Ionactis stenomeres (A.Gray) Greene
• Aster stracheyi Hook. f.
• Aster stuartii F. Muell. = Olearia stuartii (F. Muell.) F. Muell.
• Aster subcoeruleus S. Moore = Aster tongolensis Franch.
• Aster subintegerrimus (Trautv.) Ostenf. & Resvoll = Eurybia sibirica (L.) G.L.Nesom
• Aster subspicatus Nees = Symphyotrichum subspicatum (Nees) G.L.Nesom
• Aster subulatus Michx. (1803)= Symphyotrichum subulatum var. subulatum
• Aster subulatus var. cubensis (DC.) Shinners = Symphyotrichum subulatum var. parviflorum (Nees) S.D.Sundb.
• Aster subulatus var. elongatus Bosserdet ex A. G. Jones & Lowry = Symphyotrichum subulatum var. elongatum (Bosserdet ex A. G. Jones & Lowry) S. D. Sundb.
• Aster subulatus var. ligulatus Shinners = Symphyotrichum subulatum var. ligulatum (Shinners) S.D.Sundb.
• Aster sugimotoi Kitam.
• Aster suputinicus Tamamsch. = Aster ageratoides var. ageratoides
• Aster surculosus Michx. (1803) = Eurybia surculosa (Michx.) G.L.Nesom
• Aster sutchuenensis Franch.
• Aster sutschanensis Kom. = Aster ageratoides var. ageratoides
• Aster tagasagomontanus Sasaki
• Aster taiwanensis Kitam.
• Aster taliangshanensis Y.Ling
• Aster tanacetifolius Kunth = Machaeranthera tanacetifolia (Kunth) Nees
• Aster tansaniensis W.Lippert
• Aster tarbagatensis (K.Koch) Merxm.
  syn.: Linosyris tarbagatensis K.Koch
• Aster tataricus L.f.
• Aster techinensis Y.Ling
• Aster tenuifolius L. = Symphyotrichum tenuifolium (L.) G.L.Nesom
• Aster tenuipes Makino
• Aster texanus E.S.Burgess = Symphyotrichum drummondii (Lindl.) G.L.Nesom
• Aster thomsonii C.B.Clarke
• Aster tibeticus Hook.f. = Aster flaccidus var. flaccidus
• Aster tientschuanensis Hand.-Mazz.
• Aster tolmatschevii Tamamsch.
• Aster tongolensis Franch.
  syn.: Aster subcoeruleus S. Moore
• Aster tortifolius Michx. = Sericocarpus tortifolius (Michx.) Nees
• Aster tradescantii L. = Symphyotrichum tradescantii (L.) G.L.Nesom
• Aster tricephalus C.B.Clarke
• Aster trichoneurus Y.Ling
• Aster trilineatus Sch.Bip. ex Klatt = Symphyotrichum trilineatum (Sch.Bip. ex Klatt) G.L.Nesom
• Aster trinervius Roxb. ex D. Don
• Aster trinervius subsp. ageratoides (Turcz.) Grierson = Aster ageratoides var. ageratoides
• Aster trinervius var. firmus Diels = Aster ageratoides var. firmus (Diels) Hand.-Mazz.
• Aster trinervius var. ovatus Franch. & Sav. = Aster microcephalus var. ovatus (Franch. & Sav.) Soejima & Mot. Ito
• Aster trinervius var. trinervius
• Aster trinervius var. viscidulus Makino = Aster viscidulus (Makino) Makino
• Aster trinervius var. wattii (C.B.Clarke) Grierson
  syn.: Aster wattii C.B.Clarke
• Aster tripolium L.
• Aster tripolium subsp. pannonicus (Jacq.) Soó
  syn.: Aster pannonicus Jacq.
• Aster tripolium subsp. tripolium
• Aster tsarungensis (Grierson) Y.Ling
  syn.: Aster flaccidus subsp. tsarungensis Grierson
• Aster turbinatus S. Moore
• Aster turbinatus var. chekiangensis Y.Ling
• Aster turbinatus var. turbinatus
• Aster turbinellus Lindl. (1835) = Symphyotrichum turbinellum (Lindl.) G.L.Nesom
• Aster uliginosus J. M. Wood & M. S. Evans = Felicia uliginosa (J. M. Wood & M. S. Evans) Grau
• Aster umbellatus Mill. (1768) = Doellingeria umbellata (Mill.) Nees
• Aster undulatus L. (1753)= Symphyotrichum undulatum (L.) G.L.Nesom
• Aster urophyllus Lindl. = Symphyotrichum urophyllum (Lindl.) G.L.Nesom
• Aster vahlii (Gaudich.) Hook. & Arn. = Symphyotrichum vahlii var. vahlii
• Aster vahlii var. tenuifolius (Phil.) Cabrera = Symphyotrichum vahlii var. tenuifolium (Phil.) G.L.Nesom
• Aster vahlii var. vahlii = Symphyotrichum vahlii var. vahlii
• Aster veitchianus Hutch. & J. R. Drumm. ex Y.Ling
• Aster velutinosus Y.Ling
• Aster xversicolor Willd. = Symphyotrichum xversicolor (Willd.) G.L.Nesom = A. laevis × A. novi-belgii
• Aster vestitus Franch.
• Aster vialis (M. E. Bradshaw) S. F. Blake = Eucephalus vialis M.E.Bradshaw
• Aster vimineus auct. = Symphyotrichum racemosum (Elliott) G.L.Nesom
• Aster vimineus Lam. = Symphyotrichum lateriflorum var. lateriflorum
• Aster viscidulus (Makino) Makino
  syn.: Aster trinervius var. viscidulus Makino
• Aster viscosus Labill. = Olearia viscosa (Labill.) Benth.
• Aster vvedenskyi Bondarenko
• Aster walteri Alexander = Symphyotrichum walteri (Alexander) G.L.Nesom
• Aster wasatchensis (M.E.Jones) S.F.Blake (1925)= Eurybia wasatchensis (M.E.Jones) G.L.Nesom
• Aster wattii C.B.Clarke = Aster trinervius var. wattii (C.B.Clarke) Grierson
• Aster welshii Cronquist = Symphyotrichum welshii (Cronquist) G.L.Nesom
• Aster willkommii Sch.Bip.
• Aster woroschilowii Zdor. & Schapoval
• Aster yakushimensis (Kitam.) Soejima & Yahara
  syn.: Aster ageratoides subsp. yakushimensis Kitam.
• Aster yomena (Kitam.) Honda
  syn.: Aster incisus var. yomena Kitam.
• Aster yoshinaganus (Kitam.) Mot.Ito & Soejima
  syn.: Aster ageratoides subsp. yoshinaganus Kitam.
• Aster yukonensis Cronquist = Symphyotrichum yukonense (Cronquist) G.L.Nesom
• Aster yunnanensis Franch.
• Aster yunnanensis var. angnstior Hand.-Mazz.
• Aster yunnanensis var. labrangensis (Hand.-Mazz.) Y.Ling
  syn.: Aster labrangensis Hand.-Mazz.
• Aster yunnanensis var. yunnanensis
• Aster zayuensis Y.L.Chen
• Aster zuluensis W.Lippert