| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ASGI3 | Astragalus gilensis Greene | Gila milkvetch | Fabaceae
|
| ASGI4 | Astragalus gilmanii Tidestrom | Gilman's milkvetch | Fabaceae
|
| ASGIG | Astragalus gilviflorus Sheldon var. gilviflorus | plains milkvetch | Fabaceae
|
| ASGIP | Astragalus gilviflorus Sheldon var. purpureus Dorn | plains milkvetch | Fabaceae
|
| ASGI5 | Astragalus gilviflorus Sheldon | plains milkvetch | Fabaceae
|
| ASGLM | Astragalus glabriusculus (Hook.) Gray var. major Gray | Astragalus australis | Fabaceae
|
| ASGL7 | Astragalus glareosus Dougl. ex Hook. | Astragalus purshii var. glareosus | Fabaceae
|
| ASGL4 | Astragalus glycyphyllos L. | licorice milkvetch | Fabaceae
|
| ASGO4 | Astragalus goniatus Nutt. | Astragalus agrestis | Fabaceae
|
| ASGR3 | Astragalus gracilis Nutt. | slender milkvetch | Fabaceae
|
| ASGR4 | Astragalus grayi Parry ex S. Wats. | Gray's milkvetch | Fabaceae
|
| ASGR10 | Astragalus greenei Gray | Astragalus flexuosus var. greenei | Fabaceae
|
| ASGU | Astragalus gummifer Labill. | gum tragacanth milkvetch | Fabaceae
|
| ASGY | Astragalus gypsodes Barneby | gypsum milkvetch | Fabaceae
|
| ASHA9 | Astragalus halei Rydb. | Astragalus canadensis var. canadensis | Fabaceae
|
| ASHAF | Astragalus hallii Gray var. fallax (M.E. Jones) Barneby | Hall's milkvetch | Fabaceae
|
| ASHAH | Astragalus hallii Gray var. hallii | Hall's milkvetch | Fabaceae
|
| ASHA2 | Astragalus hallii Gray | Hall's milkvetch | Fabaceae
|
| ASHA3 | Astragalus hamiltonii C.L. Porter | Hamilton's milkvetch | Fabaceae
|
| ASHA13 | Astragalus hamosus L. | | Fabaceae
|
| ASHA10 | Astragalus harringtonii (Rydb.) Coville & Standl. ex Hult�n | Astragalus robbinsii var. harringtonii | Fabaceae
|
| ASHA4 | Astragalus harrisonii Barneby | Harrison's milkvetch | Fabaceae
|
| ASHA5 | Astragalus hartwegii Benth. | Hartweg's milkvetch | Fabaceae
|
| ASHA11 | Astragalus harwoodii (Munz & McBurney ex Munz) Abrams | Astragalus insularis var. harwoodii | Fabaceae
|
| ASHA8 | Astragalus haydenianus Gray | Astragalus bisulcatus var. haydenianus | Fabaceae
|
| ASHAM | Astragalus haylenianus Gray var. major M.E. Jones | Astragalus bisulcatus var. major | Fabaceae
|
| ASHE6 | Astragalus henrimontanensis Welsh | Astragalus argophyllus var. stocksii | Fabaceae
|
| ASHO5 | Astragalus holmgreniorum Barneby | Paradox milkvetch | Fabaceae
|
| ASHO | Astragalus hoodianus T.J. Howell | Hood River milkvetch | Fabaceae
|
| ASHO2 | Astragalus hornii Gray | Horn's milkvetch | Fabaceae
|
| ASHOA | Astragalus howellii Gray var. aberrans (M.E. Jones) C.L. Hitchc. | Astragalus misellus var. misellus | Fabaceae
|
| ASHOP | Astragalus howellii Gray var. pauper (Barneby) Isely | Astragalus misellus var. pauper | Fabaceae
|
| ASHO3 | Astragalus howellii Gray | Howell's milkvetch | Fabaceae
|
| ASHU | Astragalus humillimus Gray | Mancos milkvetch | Fabaceae
|
| ASHUC | Astragalus humistratus Gray var. crispulus Barneby | groundcover milkvetch | Fabaceae
|
| ASHUH | Astragalus humistratus Gray var. hosackiae (Greene) M.E. Jones | groundcover milkvetch | Fabaceae
|
| ASHUH3 | Astragalus humistratus Gray var. humistratus | groundcover milkvetch | Fabaceae
|
| ASHUH2 | Astragalus humistratus Gray var. humivagans (Rydb.) Barneby | groundcover milkvetch | Fabaceae
|
| ASHUS | Astragalus humistratus Gray var. sonorae (Gray) M.E. Jones | groundcover milkvetch | Fabaceae
|
| ASHUT | Astragalus humistratus Gray var. tenerrimus M.E. Jones | groundcover milkvetch | Fabaceae
|
| ASHU2 | Astragalus humistratus Gray | groundcover milkvetch | Fabaceae
|
| ASHY2 | Astragalus hyalinus M.E. Jones | summer milkvetch | Fabaceae
|
| ASHY7 | Astragalus hypoglottis Hook. | Astragalus agrestis | Fabaceae
|
| ASHY3 | Astragalus hypoxylus S. Wats. | Huachuca Mountain milkvetch | Fabaceae
|
| ASID | Astragalus idriensis (M.E. Jones) Abrams | Astragalus lentiginosus var. idriensis | Fabaceae
|
| ASIM | Astragalus impensis (Rydb.) Woot. & Standl. | Astragalus kentrophyta var. elatus | Fabaceae
|
| ASIN25 | Astragalus incurvus (Rydb.) Abrams | Astragalus purshii var. purshii | Fabaceae
|
| ASIN24 | Astragalus ineptus Gray | Astragalus lentiginosus var. ineptus | Fabaceae
|
| ASIN5 | Astragalus inflexus Dougl. ex Hook. | bent milkvetch | Fabaceae
|
| ASINH | Astragalus insularis Kellogg var. harwoodii Munz & McBurney ex Munz | Harwood's milkvetch | Fabaceae
|
| ASIN6 | Astragalus insularis Kellogg | Cedros milkvetch | Fabaceae
|
| ASIN7 | Astragalus inversus M.E. Jones | Susanville milkvetch | Fabaceae
|
| ASIN8 | Astragalus inyoensis Sheldon | Inyo milkvetch | Fabaceae
|
| ASIOD | Astragalus iodanthus S. Wats. var. diaphanoides Barneby | snake milkvetch | Fabaceae
|
| ASIOI | Astragalus iodanthus S. Wats. var. iodanthus | Humboldt River milkvetch | Fabaceae
|
| ASIOP | Astragalus iodanthus S. Wats. var. pseudiodanthus (Barneby) Isely | Astragalus pseudiodanthus | Fabaceae
|
| ASIOV | Astragalus iodanthus S. Wats. var. vipereus Barneby | Astragalus iodanthus var. diaphanoides | Fabaceae
|
| ASIO | Astragalus iodanthus S. Wats. | Humboldt River milkvetch | Fabaceae
|
| ASIO2 | Astragalus iodopetalus (Rydb.) Barneby | violet milkvetch | Fabaceae
|
| ASIS | Astragalus iselyi Welsh | Isely's milkvetch | Fabaceae
|
| ASJA | Astragalus jaegerianus Munz | Lane Mountain milkvetch | Fabaceae
|
| ASJEA | Astragalus jejunus S. Wats. var. articulatus Dorn | starveling milkvetch | Fabaceae
|
| ASJEJ | Astragalus jejunus S. Wats. var. jejunus | starveling milkvetch | Fabaceae
|
| ASJE2 | Astragalus jejunus S. Wats. | starveling milkvetch | Fabaceae
|
| ASJE3 | Astragalus jessiae M.E. Peck | Astragalus kentrophyta var. jessiae | Fabaceae
|
| ASJE4 | Astragalus jesupii (Egglest. & Sheldon) Britt. | Astragalus robbinsii var. jesupii | Fabaceae
|
| ASJO | Astragalus johannis-howellii Barneby | Long Valley milkvetch | Fabaceae
|
| ASJO4 | Astragalus jonesii Abrams | Astragalus purshii var. lectulus | Fabaceae
|
| ASJU4 | Astragalus junciformis A. Nels. | Astragalus convallarius var. convallarius | Fabaceae
|
| ASKA2 | Astragalus kaibensis M.E. Jones | Astragalus episcopus var. episcopus | Fabaceae
|
| ASKEC2 | Astragalus kentrophyta Gray ssp. coloradoensis (M.E. Jones) W.A. Weber | Astragalus kentrophyta var. coloradoensis | Fabaceae
|
| ASKED3 | Astragalus kentrophyta Gray ssp. danaus (Barneby) W.A. Weber | Astragalus kentrophyta var. danaus | Fabaceae
|
| ASKED4 | Astragalus kentrophyta Gray ssp. douglasii (Barneby) W.A. Weber | Astragalus kentrophyta var. douglasii | Fabaceae
|
| ASKEE2 | Astragalus kentrophyta Gray ssp. elatus (S. Wats.) W.A. Weber | Astragalus kentrophyta var. elatus | Fabaceae
|
| ASKEI2 | Astragalus kentrophyta Gray ssp. implexus (Canby ex Porter & Coult.) W.A. Weber | Astragalus kentrophyta var. tegetarius | Fabaceae
|
| ASKEJ2 | Astragalus kentrophyta Gray ssp. jessiae (M.E. Peck) W.A. Weber | Astragalus kentrophyta var. jessiae | Fabaceae
|
| ASKEN2 | Astragalus kentrophyta Gray ssp. neomexicanus (Barneby) W.A. Weber | Astragalus kentrophyta var. neomexicanus | Fabaceae
|
| ASKEU2 | Astragalus kentrophyta Gray ssp. ungulatus (M.E. Jones) W.A. Weber | Astragalus kentrophyta var. ungulatus | Fabaceae
|
| ASKEC | Astragalus kentrophyta Gray var. coloradoensis M.E. Jones | Colorado spiny milkvetch | Fabaceae
|
| ASKED | Astragalus kentrophyta Gray var. danaus (Barneby) Barneby | spiny milkvetch | Fabaceae
|
| ASKED2 | Astragalus kentrophyta Gray var. douglasii Barneby | Douglas' spiny milkvetch | Fabaceae
|
| ASKEE | Astragalus kentrophyta Gray var. elatus S. Wats. | tall spiny milkvetch | Fabaceae
|
| ASKEI | Astragalus kentrophyta Gray var. implexus (Canby ex Porter & Coult.) Barneby | Astragalus kentrophyta var. tegetarius | Fabaceae
|
| ASKEJ | Astragalus kentrophyta Gray var. jessiae (M.E. Peck) Barneby | spiny milkvetch | Fabaceae
|
| ASKEK | Astragalus kentrophyta Gray var. kentrophyta | spiny milkvetch | Fabaceae
|
| ASKEN | Astragalus kentrophyta Gray var. neomexicanus (Barneby) Barneby | New Mexico spiny milkvetch | Fabaceae
|
| ASKET | Astragalus kentrophyta Gray var. tegetarius (S. Wats.) Dorn | mat milkvetch | Fabaceae
|
| ASKEU | Astragalus kentrophyta Gray var. ungulatus M.E. Jones | spiny milkvetch | Fabaceae
|
| ASKE | Astragalus kentrophyta Gray | spiny milkvetch | Fabaceae
|
| ASKE5 | Astragalus kerrii Knight & Cully | Kerr's milkvetch | Fabaceae
|
| ASKN | Astragalus knightii Barneby | Knight's milkvetch | Fabaceae
|
| ASLA26 | Astragalus lackschewitzii Lavin & H. Marriott | Lackschewitz's milkvetch | Fabaceae
|
| ASLA14 | Astragalus lagopinus (Rydb.) M.E. Peck | Astragalus purshii var. lagopinus | Fabaceae
|
| ASLA7 | Astragalus lancearius Gray | Astragalus episcopus var. lancearius | Fabaceae
|
| ASLA13 | Astragalus laurentii (Rydb.) M.E. Peck | Astragalus collinus var. laurentii | Fabaceae
|
| ASLAR | Astragalus laxmannii Jacq. var. robustior (Hook.) Barneby & Welsh | prairie milkvetch | Fabaceae
|
| ASLAT3 | Astragalus laxmannii Jacq. var. tananaicus (Hult�n) Barneby & Welsh | standing milkvetch | Fabaceae
|
| ASLA27 | Astragalus laxmannii Jacq. | Laxmann's milkvetch | Fabaceae
|
| ASLA8 | Astragalus layneae Greene | widow's milkvetch | Fabaceae
|
| ASLE15 | Astragalus lectulus S. Wats. | Astragalus purshii var. lectulus | Fabaceae
|
| ASLE5 | Astragalus leibergii M.E. Jones | Leiberg's milkvetch | Fabaceae
|