| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ASEL5 | Aster elegantulus Porsild | Symphyotrichum falcatum var. falcatum | Asteraceae
|
| ASEL8 | Aster eliasii A. Nels. | Eurybia radulina | Asteraceae
|
| ASEL4 | Aster elliottii Torr. & Gray | Symphyotrichum elliotii | Asteraceae
|
| ASEL9 | Aster elodes Torr. & Gray | Symphyotrichum novi-belgii var. elodes | Asteraceae
|
| ASEM3 | Aster eminens Willd. | Symphyotrichum novi-belgii var. novi-belgii | Asteraceae
|
| ASENG2 | Aster engelmannii (D.C. Eat.) Gray var. glaucescens Gray | Eucephalus glaucescens | Asteraceae
|
| ASENL | Aster engelmannii (D.C. Eat.) Gray var. ledophyllus Gray | Eucephalus ledophyllus var. ledophyllus | Asteraceae
|
| ASENP | Aster engelmannii (D.C. Eat.) Gray var. paucicapitatus B.L. Robins. | Eucephalus paucicapitatus | Asteraceae
|
| ASEN2 | Aster engelmannii (D.C. Eat.) Gray | Eucephalus engelmannii | Asteraceae
|
| ASERP7 | Aster ericoides L. ssp. pansus (Blake) A.G. Jones | Symphyotrichum ericoides var. pansum | Asteraceae
|
| ASERC | Aster ericoides L. var. commutatus (Torr. & Gray) Boivin p.p. | Symphyotrichum falcatum var. commutatum | Asteraceae
|
| ASERC | Aster ericoides L. var. commutatus (Torr. & Gray) Boivin p.p. | Symphyotrichum falcatum var. falcatum | Asteraceae
|
| ASERP2 | Aster ericoides L. var. pansus (Blake) Boivin | Symphyotrichum ericoides var. pansum | Asteraceae
|
| ASERP5 | Aster ericoides L. var. parviceps Burgess | Symphyotrichum parviceps | Asteraceae
|
| ASERP4 | Aster ericoides L. var. platyphyllus Torr. & Gray | Symphyotrichum pilosum var. pilosum | Asteraceae
|
| ASERP6 | Aster ericoides L. var. pringlei Gray | Symphyotrichum pilosum var. pringlei | Asteraceae
|
| ASERP | Aster ericoides L. var. prostratus (Kuntze) Blake | Symphyotrichum ericoides var. prostratum | Asteraceae
|
| ASERP3 | Aster ericoides L. var. pusillus Gray | Symphyotrichum depauperatum | Asteraceae
|
| ASERS | Aster ericoides L. var. stricticaulis (Torr. & Gray) F.C. Gates | Symphyotrichum ericoides var. stricticaule | Asteraceae
|
| ASERS3 | Aster ericoides L. var. strictus Porter | Symphyotrichum porteri | Asteraceae
|
| ASERV | Aster ericoides L. var. villosus (Michx.) Torr. & Gray | Symphyotrichum pilosum var. pilosum | Asteraceae
|
| ASER3 | Aster ericoides L. | Symphyotrichum ericoides var. ericoides | Asteraceae
|
| ASER5 | Aster eryngiifolius Torr. & Gray | Eurybia eryngiifolia | Asteraceae
|
| ASEU | Aster eulae Shinners | Symphyotrichum eulae | Asteraceae
|
| ASEX4 | Aster excavatus Burgess | Eurybia divaricata | Asteraceae
|
| ASEX6 | Aster exiguus Rydb. | Symphyotrichum ericoides var. prostratum | Asteraceae
|
| ASEXA | Aster exilis Ell. var. australis Gray | Symphyotrichum squamatum | Asteraceae
|
| ASEX5 | Aster ?exilis Ell., nomen dubium | Symphyotrichum divaricatum | Asteraceae
|
| ASEX7 | Aster exscapus Richards. | Townsendia exscapa | Asteraceae
|
| ASFAC3 | Aster falcatus Lindl. ssp. commutatus (Torr. & Gray) A.G. Jones | Symphyotrichum falcatum var. commutatum | Asteraceae
|
| ASFAC | Aster falcatus Lindl. var. commutatus (Torr. & Gray) A.G. Jones | Symphyotrichum falcatum var. commutatum | Asteraceae
|
| ASFAC2 | Aster falcatus Lindl. var. crassulus (Rydb.) Cronq. | Symphyotrichum falcatum var. crassulum | Asteraceae
|
| ASFA2 | Aster falcatus Lindl. | Symphyotrichum falcatum var. falcatum | Asteraceae
|
| ASFA5 | Aster falcidens Burgess | Symphyotrichum laeve var. laeve | Asteraceae
|
| ASFA4 | Aster faxonii Porter | Symphyotrichum pilosum var. pringlei | Asteraceae
|
| ASFE | Aster fendleri Gray | Symphyotrichum fendleri | Asteraceae
|
| ASFIM | Aster finkii Rydb. var. moratus Shinners | Symphyotrichum cordifolium | Asteraceae
|
| ASFI3 | Aster finkii Rydb. | Symphyotrichum finkii | Asteraceae
|
| ASFI5 | Aster firmus Nees | Symphyotrichum puniceum var. puniceum | Asteraceae
|
| ASFL3 | Aster flexilis Burgess | Eurybia divaricata | Asteraceae
|
| ASFOA | Aster foliaceus Lindl. ex DC. var. apricus Gray | Symphyotrichum foliaceum var. apricum | Asteraceae
|
| ASFOA2 | Aster foliaceus Lindl. ex DC. var. arcuans Fern. | Symphyotrichum novi-belgii var. crenifolium | Asteraceae
|
| ASFOB | Aster foliaceus Lindl. ex DC. var. burkei Gray | Symphyotrichum foliaceum var. canbyi | Asteraceae
|
| ASFOC | Aster foliaceus Lindl. ex DC. var. canbyi Gray | Symphyotrichum foliaceum var. canbyi | Asteraceae
|
| ASFOC2 | Aster foliaceus Lindl. ex DC. var. cusickii (Gray) Cronq. | Symphyotrichum cusickii | Asteraceae
|
| ASFOE | Aster foliaceus Lindl. ex DC. var. eatonii Gray | Symphyotrichum eatonii | Asteraceae
|
| ASFOF2 | Aster foliaceus Lindl. ex DC. var. frondeus Gray | Symphyotrichum foliaceum var. parryi | Asteraceae
|
| ASFOL | Aster foliaceus Lindl. ex DC. var. lyallii (Gray) Cronq. | Symphyotrichum hendersonii | Asteraceae
|
| ASFOP | Aster foliaceus Lindl. ex DC. var. parryi (D.C. Eat.) Gray | Symphyotrichum foliaceum var. parryi | Asteraceae
|
| ASFOS2 | Aster foliaceus Lindl. ex DC. var. subgeminatus Fern. | Symphyotrichum ciliolatum | Asteraceae
|
| ASFOS | Aster foliaceus Lindl. ex DC. var. sublinearis D.C. Eat. & Grisc. | Symphyotrichum foliaceum var. foliaceum | Asteraceae
|
| ASFOS3 | Aster foliaceus Lindl. ex DC. var. subpetiolatus Fern. | Symphyotrichum foliaceum var. parryi | Asteraceae
|
| ASFO | Aster foliaceus Lindl. ex DC. | Symphyotrichum foliaceum var. foliaceum | Asteraceae
|
| ASFO7 | Aster foliaceus auct. non Lindl. ex DC. | Symphyotrichum novi-belgii var. crenifolium | Asteraceae
|
| ASFO4 | Aster fontinalis Alexander | Symphyotrichum fontinale | Asteraceae
|
| ASFO8 | Aster forwoodii S. Wats. | Symphyotrichum puniceum var. puniceum | Asteraceae
|
| ASFRB | Aster fragilis Willd. var. ?brachypholis (Small) A.G. Jones | Symphyotrichum racemosum | Asteraceae
|
| ASFRS | Aster fragilis Willd. var. ?subdumosus (Wieg.) A.G. Jones | Symphyotrichum racemosum | Asteraceae
|
| ASFR2 | Aster ?fragilis auct. non Willd. | Symphyotrichum racemosum | Asteraceae
|
| ASFR6 | Aster franklinianus Rydb. | Symphyotrichum boreale | Asteraceae
|
| ASFRP | Aster fremontii (Torr. & Gray) Gray var. parishii Gray | Symphyotrichum spathulatum var. spathulatum | Asteraceae
|
| ASFR7 | Aster fremontii (Torr. & Gray) Gray | Symphyotrichum spathulatum var. spathulatum | Asteraceae
|
| ASFR8 | Aster frondeus (Gray) Greene | Symphyotrichum foliaceum var. parryi | Asteraceae
|
| ASFR | Aster frondosus (Nutt.) Torr. & Gray | Symphyotrichum frondosum | Asteraceae
|
| ASFU | Aster furcatus Burgess | Eurybia furcata | Asteraceae
|
| ASGA7 | Aster gaspensis Victorin | Symphyotrichum novi-belgii var. villicaule | Asteraceae
|
| ASGA3 | Aster gattingeri Alexander, non Kuntze | Eurybia hemispherica | Asteraceae
|
| ASGE2 | Aster georgianus Alexander | Symphyotrichum georgianum | Asteraceae
|
| ASGE3 | Aster geyeri (Gray) T.J. Howell | Symphyotrichum laeve var. geyeri | Asteraceae
|
| ASGLP2 | Aster glabriuscula (Nutt.) Torr. & Gray var. parryi (Gray) Onno | Xylorhiza glabriuscula var. glabriuscula | Asteraceae
|
| ASGL9 | Aster glabriuscula (Nutt.) Torr. & Gray | Xylorhiza glabriuscula var. glabriuscula | Asteraceae
|
| ASGL2 | Aster glaucescens (Gray) Blake | Eucephalus glaucescens | Asteraceae
|
| ASGLP | Aster glaucodes Blake ssp. pulcher Blake | Eurybia pulchra | Asteraceae
|
| ASGLF | Aster glaucodes Blake var. formosus (Greene) Kittell | Eurybia glauca | Asteraceae
|
| ASGLP3 | Aster glaucodes Blake var. pulcher (Blake) Kearney & Peebles ex Welsh | Eurybia pulchra | Asteraceae
|
| ASGL3 | Aster glaucodes Blake | Eurybia glauca | Asteraceae
|
| ASGLW | Aster glaucus Torr. & Gray var. wasatchensis M.E. Jones | Eurybia wasatchensis | Asteraceae
|
| ASGL10 | Aster glaucus Torr. & Gray, non Nees | Eurybia glauca | Asteraceae
|
| ASGL11 | Aster glomeratus (Bernh. ex Nees) Burgess | Eurybia schreberi | Asteraceae
|
| ASGL8 | Aster glossophyllus Piper | Machaeranthera canescens ssp. canescens var. canescens | Asteraceae
|
| ASGO3 | Aster goodingii Onno | Xylorhiza tortifolia var. tortifolia | Asteraceae
|
| ASGO | Aster gormanii (Piper) Blake | Eucephalus gormanii | Asteraceae
|
| ASGR12 | Aster gracilescens Burgess | Symphyotrichum undulatum | Asteraceae
|
| ASGR6 | Aster gracilipes (Wieg.) Alexander | Symphyotrichum dumosum var. gracilipes | Asteraceae
|
| ASGR7 | Aster gracilis Nutt. | Eurybia compacta | Asteraceae
|
| ASGR | Aster grandiflorus L. | Symphyotrichum grandiflorum | Asteraceae
|
| ASGR8 | Aster �gravesii Burgess (pro sp.) | Symphyotrichum gravesii | Asteraceae
|
| ASGR11 | Aster grayi Suksdorf | Symphyotrichum subspicatum var. grayi | Asteraceae
|
| ASGR2 | Aster greatae Parish | Symphyotrichum greatae | Asteraceae
|
| ASGY2 | Aster gymnocephalus auct. non (DC.) Gray | Machaeranthera blephariphylla | Asteraceae
|
| ASHA7 | Aster hallii Gray | Symphyotrichum hallii | Asteraceae
|
| ASHA12 | Aster haydenii Porter | Oreostemma alpigenum var. haydenii | Asteraceae
|
| ASHE7 | Aster hemisphericus Alexander | Eurybia hemispherica | Asteraceae
|
| ASHE10 | Aster hendersonii Fern. | Symphyotrichum hendersonii | Asteraceae
|
| ASHE8 | Aster �herveyi Gray (pro sp.) | Eurybia herveyi | Asteraceae
|
| ASHEL | Aster hesperius Gray var. laetevirens (Greene) Cronq. | Symphyotrichum lanceolatum ssp. hesperium var. hesperium | Asteraceae
|
| ASHEW | Aster hesperius Gray var. wootonii Greene | Symphyotrichum lanceolatum ssp. hesperium var. hesperium | Asteraceae
|
| ASHE | Aster hesperius Gray | Symphyotrichum lanceolatum ssp. hesperium var. hesperium | Asteraceae
|
| ASHI4 | Aster hirsuticaulis Lindl. ex DC. | Symphyotrichum lateriflorum var. hirsuticaule | Asteraceae
|
| ASHI5 | Aster hirtellus Lindl. | Symphyotrichum urophyllum | Asteraceae
|
| ASHI2 | Aster hirtifolius Blake | Chaetopappa ericoides | Asteraceae
|