| Astragalus humistratus var. humistratus A. Gray, 1853 |
| Astragalus humistratus var. sonorae (A. Gray) M.E. Jones, 1902 |
| Astragalus hypoleucus S. Schauer, 1847 |
| Astragalus hypoxylus S. Watson, 1883 |
| Astragalus idrietorum Barneby, 1964 |
| Astragalus insularis Kellogg, 1884 |
| Astragalus insularis var. harwoodii Munz & McBurney, 1932 |
| Astragalus insularis var. insularis Kellogg, 1884 |
| Astragalus insularis var. quentinus M.E. Jones, 1898 |
| Astragalus irolanus (M.E. Jones) Rydb., 1929 |
| Astragalus jaliscensis (Rydb.) Barneby, 1964 |
| Astragalus julianus M.E. Jones, 1895 |
| Astragalus lagunensis M.E. Jones, 1898 |
| Astragalus legionensis Barneby, 1964 |
| Astragalus lentiginosus Douglas ex Hook., 1831 |
| Astragalus lentiginosus var. australis Barneby, 1945 |
| Astragalus lentiginosus var. borreganus M.E. Jones, 1898 |
| Astragalus lentiginosus var. ineptus (A. Gray) M.E. Jones, 1923 |
| Astragalus lentiginosus var. lentiginosus Douglas ex Hook., 1831 |
| Astragalus leptocarpoides (M.E. Jones) Cory, 1936 |