| Astragalus crotalariae A. Gray, 1864 |
| Astragalus crotalariae var. anemophilus (Greene) M.E. Jones, 1902 |
| Astragalus crotalariae var. magdalenae (Greene) M.E. Jones, 1902 |
| Astragalus crotalariae var. piscinus (M.E. Jones) Jeps., 1936 |
| Astragalus daleae Greene, 1888 |
| Astragalus datilensis (Rydb.) Tidestr., 1937 |
| Astragalus davisianus Greene ex Rydb., 1927 |
| Astragalus didymocarpus Hook. & Arn., 1838 |
| Astragalus didymocarpus var. dispermus (A. Gray) Jeps., 1936 |
| Astragalus didymocarpus var. obispensis (Rydb.) Jeps., 1936 |
| 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 |