| Astragalus diphacus S. Watson, 1882 |
| Astragalus diphacus var. peonis M.E. Jones, 1902 |
| Astragalus dispermus A. Gray, 1878 |
| Astragalus douglasii (Torr. & A. Gray) A. Gray, 1864 |
| Astragalus douglasii var. glaberrimus M.E. Jones, 1895 |
| Astragalus douglasii var. parishii (A. Gray) M.E. Jones, 1898 |
| Astragalus douglasii var. perstrictus (Rydb.) Munz & McBurney, 1932 |
| Astragalus douglasii var. piscinus (M.E. Jones) M.E. Jones, 1902 |
| Astragalus earlei Greene ex Rydb., 1929 |
| Astragalus elmeri Greene, 1895 |
| Astragalus emoryanus (Rydb.) Cory, 1936 |
| Astragalus emoryanus var. terlinguensis (Cory) Barneby, 1956 |
| Astragalus ervoides Hook. & Arn., 1840 |
| Astragalus ervoides var. ervoides Hook. & Arn., 1840 |
| Astragalus ervoides var. maysillesii Barneby, 1964 |
| Astragalus erythrostachys Ulbr., 1902 |
| Astragalus esperanzae M.E. Jones, 1923 |
| Astragalus fastidiosus Greene, 1886 |
| Astragalus fastidius (Kellogg) M.E. Jones, 1898 |
| Astragalus fendleri (A. Gray) A. Gray, 1853 |