| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ASHO6 | Aster horridus (Woot. & Standl.) Blake | Eurybia horrida | Asteraceae
|
| ASHU5 | Aster humilis Willd. | Doellingeria infirma | Asteraceae
|
| ASHY6 | Aster hydrophilus Greene ex Woot. & Standl. | Almutaster pauciflorus | Asteraceae
|
| ASIA | Aster ianthinus Burgess | Eurybia macrophylla | Asteraceae
|
| ASIN15 | Aster inconspicuus Less. | Symphyotrichum expansum | Asteraceae
|
| ASIN2 | Aster infirmus Michx. | Doellingeria infirma | Asteraceae
|
| ASIN23 | Aster inornatus Greene | Machaeranthera canescens ssp. canescens var. shastensis | Asteraceae
|
| ASIN3 | Aster integrifolius Nutt. | Eurybia integrifolia | Asteraceae
|
| ASIN18 | Aster interior Wieg. | Symphyotrichum lanceolatum ssp. lanceolatum var. interior | Asteraceae
|
| ASIN4 | Aster intricatus (Gray) Blake | Machaeranthera carnosa var. intricata | Asteraceae
|
| ASIN17 | Aster invenustus Greene | Symphyotrichum chilense var. invenustum | Asteraceae
|
| ASJE | Aster jessicae Piper | Symphyotrichum jessicae | Asteraceae
|
| ASJOV | Aster johannensis Fern. var. villicaulis (Gray) Fern. | Symphyotrichum novi-belgii var. villicaule | Asteraceae
|
| ASJO2 | Aster johannensis Fern. | Symphyotrichum novi-belgii var. villicaule | Asteraceae
|
| ASJO3 | Aster jonesiae Lamboy | Eurybia jonesiae | Asteraceae
|
| ASJU6 | Aster junceus Ait. | Symphyotrichum novi-belgii var. novi-belgii | Asteraceae
|
| ASJU5 | Aster junceus auct. non Ait. | Symphyotrichum boreale | Asteraceae
|
| ASJU | Aster junciformis Rydb. | Symphyotrichum boreale | Asteraceae
|
| ASJU3 | Aster juniperinus Burgess | Symphyotrichum pilosum var. pilosum | Asteraceae
|
| ASKE4 | Aster kentuckiensis Britt. | Symphyotrichum priceae | Asteraceae
|
| ASKIB | Aster kingii D.C. Eat. var. barnebyana (Welsh & Goodrich) Welsh | Tonestus kingii var. barnebyana | Asteraceae
|
| ASKI | Aster kingii D.C. Eat. | Tonestus kingii var. kingii | Asteraceae
|
| ASKU | Aster kumleinii Fries ex Gray | Symphyotrichum oblongifolium | Asteraceae
|
| ASLA11 | Aster laetevirens Greene | Symphyotrichum lanceolatum ssp. hesperium var. hesperium | Asteraceae
|
| ASLAC | Aster laevis L. var. concinnus (Willd.) House | Symphyotrichum laeve var. concinnum | Asteraceae
|
| ASLAF2 | Aster laevis L. var. falcatus Farw. | Symphyotrichum laeve var. laeve | Asteraceae
|
| ASLAG | Aster laevis L. var. geyeri Gray | Symphyotrichum laeve var. geyeri | Asteraceae
|
| ASLAG3 | Aster laevis L. var. guadalupensis A.G. Jones | Symphyotrichum laeve var. geyeri | Asteraceae
|
| ASLAP2 | Aster laevis L. var. purpuratus (Nees) A.G. Jones | Symphyotrichum laeve var. purpuratum | Asteraceae
|
| ASLA5 | Aster laevis L. | Symphyotrichum laeve var. laeve | Asteraceae
|
| ASLA12 | Aster lamarckianus Nees | Symphyotrichum lanceolatum ssp. lanceolatum var. lanceolatum | Asteraceae
|
| ASLAH2 | Aster lanceolatus Willd. ssp. hesperius (Gray) Semple & Chmielewski | Symphyotrichum lanceolatum ssp. hesperium var. hesperium | Asteraceae
|
| ASLAI3 | Aster lanceolatus Willd. ssp. interior (Wieg.) A.G. Jones | Symphyotrichum lanceolatum ssp. lanceolatum var. interior | Asteraceae
|
| ASLAS3 | Aster lanceolatus Willd. ssp. simplex (Willd.) A.G. Jones | Symphyotrichum lanceolatum ssp. lanceolatum var. lanceolatum | Asteraceae
|
| ASLAH5 | Aster lanceolatus Willd. var. hirsuticaulis Semple & Chmielewski | Symphyotrichum lanceolatum ssp. lanceolatum var. hirsuticaule | Asteraceae
|
| ASLAI4 | Aster lanceolatus Willd. var. interior (Wieg.) A.G. Jones | Symphyotrichum lanceolatum ssp. lanceolatum var. interior | Asteraceae
|
| ASLAI5 | Aster lanceolatus Willd. var. interior (Wieg.) Semple & Chmielewski | Symphyotrichum lanceolatum ssp. lanceolatum var. interior | Asteraceae
|
| ASLAL5 | Aster lanceolatus Willd. var. latifolius Semple & Chmielewski | Symphyotrichum lanceolatum ssp. lanceolatum var. latifolium | Asteraceae
|
| ASLAS4 | Aster lanceolatus Willd. var. simplex (Willd.) A.G. Jones | Symphyotrichum lanceolatum ssp. lanceolatum var. lanceolatum | Asteraceae
|
| ASLA80 | Aster lanceolatus Willd. | Symphyotrichum lanceolatum ssp. lanceolatum var. lanceolatum | Asteraceae
|
| ASLAA | Aster lateriflorus (L.) Britt. var. angustifolius Wieg. | Symphyotrichum lateriflorum var. angustifolium | Asteraceae
|
| ASLAF | Aster lateriflorus (L.) Britt. var. flagellaris Shinners | Symphyotrichum lateriflorum var. flagellare | Asteraceae
|
| ASLAH3 | Aster lateriflorus (L.) Britt. var. hirsuticaulis (Lindl. ex DC.) Porter | Symphyotrichum lateriflorum var. hirsuticaule | Asteraceae
|
| ASLAH | Aster lateriflorus (L.) Britt. var. horizontalis (Desf.) Farw. | Symphyotrichum lateriflorum var. horizontale | Asteraceae
|
| ASLAI | Aster lateriflorus (L.) Britt. var. indutus Shinners | Symphyotrichum lateriflorum var. flagellare | Asteraceae
|
| ASLAP | Aster lateriflorus (L.) Britt. var. pendulus (Ait.) Burgess | Symphyotrichum lateriflorum var. horizontale | Asteraceae
|
| ASLAS | Aster lateriflorus (L.) Britt. var. spatelliformis (Burgess) A.G. Jones | Symphyotrichum lateriflorum var. spatelliforme | Asteraceae
|
| ASLAT2 | Aster lateriflorus (L.) Britt. var. tenuipes Wieg. | Symphyotrichum lateriflorum var. tenuipes | Asteraceae
|
| ASLAT | Aster lateriflorus (L.) Britt. var. thyrsoides (Gray) Sheldon | Symphyotrichum ontarione | Asteraceae
|
| ASLA6 | Aster lateriflorus (L.) Britt. | Symphyotrichum lateriflorum var. lateriflorum | Asteraceae
|
| ASLAS2 | Aster latissimifolius (P. Mill.) Kuntze var. serotinus Kuntze | Solidago gigantea | Asteraceae
|
| ASLAB2 | Aster laxifolius Nees var. borealis Torr. & Gray | Symphyotrichum boreale | Asteraceae
|
| ASLA17 | Aster laxus Willd. | Symphyotrichum lanceolatum ssp. lanceolatum var. lanceolatum | Asteraceae
|
| ASLEC3 | Aster ledophyllus (Gray) Gray var. covillei (Greene) Cronq. | Eucephalus ledophyllus var. covillei | Asteraceae
|
| ASLE3 | Aster ledophyllus (Gray) Gray | Eucephalus ledophyllus var. ledophyllus | Asteraceae
|
| ASLE21 | Aster leiodes Blake | Machaeranthera canescens ssp. canescens var. canescens | Asteraceae
|
| ASLE14 | Aster lemmonii Gray | Symphyotrichum potosinum | Asteraceae
|
| ASLE17 | Aster lentus Greene | Symphyotrichum lentum | Asteraceae
|
| ASLE19 | Aster leucanthemifolius Greene | Machaeranthera canescens ssp. canescens var. leucanthemifolia | Asteraceae
|
| ASLE18 | Aster leucelene Blake | Chaetopappa ericoides | Asteraceae
|
| ASLIV | Aster linariifolius L. var. victorinii Fern. | Ionactis linariifolius | Asteraceae
|
| ASLI2 | Aster linariifolius L. | Ionactis linariifolius | Asteraceae
|
| ASLI9 | Aster lindleyanus Torr. & Gray | Symphyotrichum ciliolatum | Asteraceae
|
| ASLI8 | Aster linearis (Greene) Cory | Machaeranthera canescens ssp. glabra var. glabra | Asteraceae
|
| ASLI10 | Aster linguiformis Burgess | Symphyotrichum undulatum | Asteraceae
|
| ASLOV | Aster longifolius Lam. var. villicaulis Gray | Symphyotrichum novi-belgii var. villicaule | Asteraceae
|
| ASLO10 | Aster longifolius Lam. | Symphyotrichum novi-belgii var. novi-belgii | Asteraceae
|
| ASLO14 | Aster longifolius sensu Semple & Heard, non Lam. | Symphyotrichum robynsianum | Asteraceae
|
| ASLO8 | Aster �longulus Sheldon (pro sp.) | Symphyotrichum longulum | Asteraceae
|
| ASLO12 | Aster loriformis (Burgess) Burgess | Symphyotrichum undulatum | Asteraceae
|
| ASLOI | Aster lowrieanus Porter var. incisus (Britt.) Porter | Symphyotrichum cordifolium | Asteraceae
|
| ASLOL | Aster lowrieanus Porter var. lanceolatus Porter | Symphyotrichum cordifolium | Asteraceae
|
| ASLO9 | Aster lowrieanus Porter | Symphyotrichum lowrieanum | Asteraceae
|
| ASLU | Aster lucidulus (Gray) Wieg. | Symphyotrichum puniceum var. puniceum | Asteraceae
|
| ASLU3 | Aster lutescens (Lindl. ex DC.) Torr. & Gray | Oligoneuron lutescens | Asteraceae
|
| ASMA26 | Aster maccallae Rydb. | Symphyotrichum ciliolatum | Asteraceae
|
| ASMA14 | Aster macounii Rydb. | Symphyotrichum ascendens | Asteraceae
|
| ASMAA | Aster macrophyllus L. var. apricensis Burgess | Eurybia macrophylla | Asteraceae
|
| ASMAE | Aster macrophyllus L. var. excelsior Burgess | Eurybia macrophylla | Asteraceae
|
| ASMAI | Aster macrophyllus L. var. ianthinus (Burgess) Fern. | Eurybia macrophylla | Asteraceae
|
| ASMAP2 | Aster macrophyllus L. var. pinguifolius Burgess | Eurybia macrophylla | Asteraceae
|
| ASMAS | Aster macrophyllus L. var. sejunctus Burgess | Eurybia macrophylla | Asteraceae
|
| ASMAV | Aster macrophyllus L. var. velutinus Burgess | Eurybia macrophylla | Asteraceae
|
| ASMA2 | Aster macrophyllus L. | Eurybia macrophylla | Asteraceae
|
| ASMA15 | Aster major (Hook.) Porter | Canadanthus modestus | Asteraceae
|
| ASME5 | Aster mearnsii Rydb. | Symphyotrichum eatonii | Asteraceae
|
| ASME6 | Aster meritus A. Nels. | Eurybia merita | Asteraceae
|
| ASMI16 | Aster mirabilis Torr. & Gray | Eurybia mirabilis | Asteraceae
|
| ASMIT2 | Aster missouriensis Britt. var. thyrsoides (Gray) Wieg. | Symphyotrichum ontarione | Asteraceae
|
| ASMI14 | Aster missouriensis Britt., non Kuntze | Symphyotrichum ontarione | Asteraceae
|
| ASMO3 | Aster modestus Lindl. | Canadanthus modestus | Asteraceae
|
| ASMO15 | Aster mohavensis Coville, non Kuntze | Xylorhiza tortifolia var. tortifolia | Asteraceae
|
| ASMO12 | Aster mohrii Burgess | Symphyotrichum undulatum | Asteraceae
|
| ASMO13 | Aster mollis Rydb. | Symphyotrichum molle | Asteraceae
|
| ASMUC | Aster multiflorus Ait. var. commutatus Torr. & Gray | Symphyotrichum falcatum var. commutatum | Asteraceae
|
| ASMUE | Aster multiflorus Ait. var. exiguus Fern. | Symphyotrichum ericoides var. ericoides | Asteraceae
|
| ASMUP2 | Aster multiflorus Ait. var. pansus Blake | Symphyotrichum ericoides var. pansum | Asteraceae
|
| ASMUP | Aster multiflorus Ait. var. prostratus Kuntze | Symphyotrichum ericoides var. prostratum | Asteraceae
|
| ASMUS | Aster multiflorus Ait. var. stricticaulis Torr. & Gray | Symphyotrichum ericoides var. stricticaule | Asteraceae
|
| ASMU5 | Aster multiflorus Ait. | Symphyotrichum ericoides var. ericoides | Asteraceae
|
| ASMU6 | Aster multiformis Burgess | Eurybia macrophylla | Asteraceae
|