| Astragalus allochrous A. Gray, 1878 |
| Astragalus allochrous var. playanus M.E. Jones, 1998 |
| Astragalus alpinus L., 1753 |
| Astragalus alpinus var. giganteus Pall., 1753 |
| Astragalus amphioxys A. Gray, 1878 |
| Astragalus anemophilus Greene, 1886 |
| Astragalus angelinus M.E. Jones, 1923 |
| Astragalus antoninus S. Watson, 1882 |
| Astragalus apertus E. Sheld., 1894 |
| Astragalus aridus A. Gray, 1864 |
| Astragalus arizonicus A. Gray, 1868 |
| Astragalus arthu-schottii A. Gray, 1864 |
| Astragalus austrinus (Small) E.D. Schulz, 1922 |
| Astragalus bajaensis E. Sheld., 1894 |
| Astragalus brauntonii Parish 1903 |
| Astragalus brauntonii var. lativexillum A.E. Estrada, Rebman, C. González & Villarreal, 2022 |
| Astragalus brazoensis Buckley, 1862 |
| Astragalus candidissimus Ledeb., 1831 |
| Astragalus carminis Barneby, 1953 |
| Astragalus cenorrhynchus Barneby, 1982 |