| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ASMIH | Astragalus miser Dougl. var. hylophilus (Rydb.) Barneby | woody milkvetch | Fabaceae
|
| ASMIM4 | Astragalus miser Dougl. var. miser | timber milkvetch | Fabaceae
|
| ASMIO | Astragalus miser Dougl. var. oblongifolius (Rydb.) Cronq. | timber milkvetch | Fabaceae
|
| ASMIP2 | Astragalus miser Dougl. var. praeteritus Barneby | Yellowstone milkvetch | Fabaceae
|
| ASMIS | Astragalus miser Dougl. var. serotinus (Gray ex Cooper) Barneby | timber milkvetch | Fabaceae
|
| ASMIT | Astragalus miser Dougl. var. tenuifolius (Nutt.) Barneby | timber milkvetch | Fabaceae
|
| ASMI9 | Astragalus miser Dougl. | timber milkvetch | Fabaceae
|
| ASMIA2 | Astragalus missouriensis Nutt. var. accumbens (Sheldon) Isely | Astragalus accumbens | Fabaceae
|
| ASMIA | Astragalus missouriensis Nutt. var. amphibolus Barneby | Missouri milkvetch | Fabaceae
|
| ASMIH2 | Astragalus missouriensis Nutt. var. humistratus Isely | Missouri milkvetch | Fabaceae
|
| ASMIM | Astragalus missouriensis Nutt. var. mimetes Barneby | horn loco milkvetch | Fabaceae
|
| ASMIM5 | Astragalus missouriensis Nutt. var. missouriensis | Missouri milkvetch | Fabaceae
|
| ASMI10 | Astragalus missouriensis Nutt. | Missouri milkvetch | Fabaceae
|
| ASMO4 | Astragalus moencoppensis M.E. Jones | Moenkopi milkvetch | Fabaceae
|
| ASMOH | Astragalus mohavensis S. Wats. var. hemigyrus (Clokey) Barneby | Mojave milkvetch | Fabaceae
|
| ASMOM4 | Astragalus mohavensis S. Wats. var. mohavensis | Mojave milkvetch | Fabaceae
|
| ASMO5 | Astragalus mohavensis S. Wats. | Mojave milkvetch | Fabaceae
|
| ASMO6 | Astragalus mokiacensis Gray | Mokiak milkvetch | Fabaceae
|
| ASMOB | Astragalus mollissimus Torr. var. bigelovii (Gray) Barneby | woolly locoweed | Fabaceae
|
| ASMOC | Astragalus mollissimus Torr. var. coryi Tidestrom | woolly locoweed | Fabaceae
|
| ASMOE | Astragalus mollissimus Torr. var. earlei (Greene ex Rydb.) Tidestrom | woolly locoweed | Fabaceae
|
| ASMOM | Astragalus mollissimus Torr. var. marcidus (Greene ex Rydb.) Barneby | woolly locoweed | Fabaceae
|
| ASMOM2 | Astragalus mollissimus Torr. var. matthewsii (S. Wats.) Barneby | woolly locoweed | Fabaceae
|
| ASMOM3 | Astragalus mollissimus Torr. var. mogollonicus (Greene) Barneby | woolly locoweed | Fabaceae
|
| ASMOM5 | Astragalus mollissimus Torr. var. mollissimus | woolly locoweed | Fabaceae
|
| ASMOT | Astragalus mollissimus Torr. var. thompsoniae (S. Wats.) Barneby | woolly locoweed | Fabaceae
|
| ASMO7 | Astragalus mollissimus Torr. | woolly locoweed | Fabaceae
|
| ASMO8 | Astragalus molybdenus Barneby | Leadville milkvetch | Fabaceae
|
| ASMOR | Astragalus monoensis Barneby var. ravenii (Barneby) Isely | Astragalus ravenii | Fabaceae
|
| ASMO9 | Astragalus monoensis Barneby | Mono milkvetch | Fabaceae
|
| ASMO11 | Astragalus montii Welsh | Astragalus limnocharis var. montii | Fabaceae
|
| ASMOC2 | Astragalus monumentalis Barneby var. cottamii (Welsh) Isely | Cottam's milkvetch | Fabaceae
|
| ASMOM6 | Astragalus monumentalis Barneby var. monumentalis | Monument Valley milkvetch | Fabaceae
|
| ASMO10 | Astragalus monumentalis Barneby | Monument Valley milkvetch | Fabaceae
|
| ASMO14 | Astragalus mortonii Nutt. | Astragalus canadensis var. mortonii | Fabaceae
|
| ASMU | Astragalus mulfordiae M.E. Jones | Mulford's milkvetch | Fabaceae
|
| ASMU2 | Astragalus musimonum Barneby | Astragalus amphioxys var. musimonum | Fabaceae
|
| ASMU3 | Astragalus musiniensis M.E. Jones | Ferron's milkvetch | Fabaceae
|
| ASNA | Astragalus naturitensis Payson | Naturita milkvetch | Fabaceae
|
| ASNE2 | Astragalus neglectus (Torr. & Gray) Sheldon | Cooper's milkvetch | Fabaceae
|
| ASNE3 | Astragalus nelsonianus Barneby | Nelson's milkvetch | Fabaceae
|
| ASNE4 | Astragalus neomexicanus Woot. & Standl. | New Mexico milkvetch | Fabaceae
|
| ASNE5 | Astragalus nevinii Gray | San Clemente Island milkvetch | Fabaceae
|
| ASNEA | Astragalus newberryi Gray var. aquarii Isely | Newberry's milkvetch | Fabaceae
|
| ASNEB | Astragalus newberryi Gray var. blyae (Rose ex Rydb.) Barneby | Newberry's milkvetch | Fabaceae
|
| ASNEC | Astragalus newberryi Gray var. castoreus M.E. Jones | Newberry's milkvetch | Fabaceae
|
| ASNEE | Astragalus newberryi Gray var. escalantinus Barneby | Escalante milkvetch | Fabaceae
|
| ASNEN | Astragalus newberryi Gray var. newberryi | Newberry's milkvetch | Fabaceae
|
| ASNEW | Astragalus newberryi Gray var. wardianus Barneby | Astragalus loanus | Fabaceae
|
| ASNE6 | Astragalus newberryi Gray | Newberry's milkvetch | Fabaceae
|
| ASNI2 | Astragalus nidularius Barneby | birdnest milkvetch | Fabaceae
|
| ASNI4 | Astragalus nigricalycis (M.E. Jones) Abrams | Astragalus lentiginosus var. nigricalycis | Fabaceae
|
| ASNO3 | Astragalus nothoxys Gray | sheep milkvetch | Fabaceae
|
| ASNU2 | Astragalus nudisiliquus A. Nels. | cobblestone milkvetch | Fabaceae
|
| ASNU3 | Astragalus nutans M.E. Jones | Providence Mountain milkvetch | Fabaceae
|
| ASNU7 | Astragalus nutriosensis Sanderson | Apache milkvetch | Fabaceae
|
| ASNUA | Astragalus nuttallianus DC. var. austrinus (Small) Barneby | smallflowered milkvetch | Fabaceae
|
| ASNUC | Astragalus nuttallianus DC. var. cedrosensis M.E. Jones | turkeypeas | Fabaceae
|
| ASNUI | Astragalus nuttallianus DC. var. imperfectus (Rydb.) Barneby | turkeypeas | Fabaceae
|
| ASNUM | Astragalus nuttallianus DC. var. macilentus (Small) Barneby | turkeypeas | Fabaceae
|
| ASNUM2 | Astragalus nuttallianus DC. var. micranthiformis Barneby | turkeypeas | Fabaceae
|
| ASNUN | Astragalus nuttallianus DC. var. nuttallianus | smallflowered milkvetch | Fabaceae
|
| ASNUP | Astragalus nuttallianus DC. var. pleianthus (Shinners) Barneby | Astragalus pleianthus | Fabaceae
|
| ASNUT | Astragalus nuttallianus DC. var. trichocarpus Torr. & Gray | turkeypeas | Fabaceae
|
| ASNUZ | Astragalus nuttallianus DC. var. zapatanus Barneby | turkeypeas | Fabaceae
|
| ASNU4 | Astragalus nuttallianus DC. | smallflowered milkvetch | Fabaceae
|
| ASNUN2 | Astragalus nuttallii (Torr. & Gray) J.T. Howell var. nuttallii | Nuttall's milkvetch | Fabaceae
|
| ASNUV | Astragalus nuttallii (Torr. & Gray) J.T. Howell var. virgatus (Gray ex Brewer & S. Wats.) Barneby | Nuttall's milkvetch | Fabaceae
|
| ASNU5 | Astragalus nuttallii (Torr. & Gray) J.T. Howell | Nuttall's milkvetch | Fabaceae
|
| ASNU6 | Astragalus nutzotinensis Rouss. | Nutzotin milkvetch | Fabaceae
|
| ASNY2 | Astragalus nyensis Barneby | Nye milkvetch | Fabaceae
|
| ASOB3 | Astragalus obcordatus Ell. | Florida milkvetch | Fabaceae
|
| ASOB4 | Astragalus obscurus S. Wats. | arcane milkvetch | Fabaceae
|
| ASOC3 | Astragalus occidentalis (S. Wats.) M.E. Jones | Astragalus robbinsii var. occidentalis | Fabaceae
|
| ASON2 | Astragalus oniciformis Barneby | Picabo milkvetch | Fabaceae
|
| ASOO | Astragalus oocalycis M.E. Jones | Arboles milkvetch | Fabaceae
|
| ASOO2 | Astragalus oocarpus Gray | Descanso milkvetch | Fabaceae
|
| ASOOC | Astragalus oophorus S. Wats. var. caulescens (M.E. Jones) M.E. Jones | egg milkvetch | Fabaceae
|
| ASOOC2 | Astragalus oophorus S. Wats. var. clokeyanus Barneby | egg milkvetch | Fabaceae
|
| ASOOL3 | Astragalus oophorus S. Wats. var. lavinii Barneby | Lavin's milkvetch | Fabaceae
|
| ASOOL | Astragalus oophorus S. Wats. var. lonchocalyx Barneby | egg milkvetch | Fabaceae
|
| ASOOO2 | Astragalus oophorus S. Wats. var. oophorus | egg milkvetch | Fabaceae
|
| ASOO3 | Astragalus oophorus S. Wats. | egg milkvetch | Fabaceae
|
| ASOP | Astragalus ophiogenes Barneby | Astragalus purshii var. ophiogenes | Fabaceae
|
| ASOR2 | Astragalus oreganus Nutt. | Oregon milkvetch | Fabaceae
|
| ASOS | Astragalus osterhoutii M.E. Jones | Kremmling milkvetch | Fabaceae
|
| ASOW | Astragalus owyheensis A. Nels. & J.F. Macbr. | Astragalus atratus var. owyheensis | Fabaceae
|
| ASOX | Astragalus oxyphysus Gray | Mt. Diablo milkvetch | Fabaceae
|
| ASPA31 | Astragalus pachycarpus Torr. & Gray | Astragalus plattensis | Fabaceae
|
| ASPAJ | Astragalus pachypus Greene var. jaegeri Munz & McBurney ex Munz | Jaeger's milkvetch | Fabaceae
|
| ASPAP5 | Astragalus pachypus Greene var. pachypus | thickpod milkvetch | Fabaceae
|
| ASPA9 | Astragalus pachypus Greene | thickpod milkvetch | Fabaceae
|
| ASPA27 | Astragalus pachystachys Rydb. | Astragalus accidens var. hendersonii | Fabaceae
|
| ASPA10 | Astragalus palmeri Gray | Palmer's milkvetch | Fabaceae
|
| ASPA32 | Astragalus palousensis Piper | Astragalus arrectus | Fabaceae
|
| ASPA11 | Astragalus panamintensis Sheldon | Panamint milkvetch | Fabaceae
|
| ASPA29 | Astragalus panguicensis (M.E. Jones) M.E. Jones | Astragalus argophyllus var. panguicensis | Fabaceae
|
| ASPA12 | Astragalus pardalinus (Rydb.) Barneby | panther milkvetch | Fabaceae
|
| ASPAP6 | Astragalus parishii Gray ssp. perstrictus (Rydb.) Abrams | Astragalus douglasii var. perstrictus | Fabaceae
|
| ASPA28 | Astragalus parishii Gray | Astragalus douglasii var. parishii | Fabaceae
|
| ASPA13 | Astragalus parryi Gray | Parry's milkvetch | Fabaceae
|