Astragalus gambelianus E. Sheld. in Minnesota Bot. Stud. 1(1): 21. 1894 sec. Téllez-Valdés 2009
- ≡Hesperastragalus gambellianus (E. Sheld.) A. Heller in Muhlenbergia 2(1B): 87. 1905 syn. sec. Téllez-Valdés 2009
- =Astragalus nigrescens Pall., Sp. Astrag.: 65, pl. 53. 1800 syn. sec. Téllez-Valdés 2009
- =Astragalus elmeri Greene in Erythea 3(6): 98. 1895 syn. sec. Téllez-Valdés 2009
- =Hesperastragalus elmeri (Greene) Rydb. in Bull. Torrey Bot. Club 53(3): 168. 1926 syn. sec. Téllez-Valdés 2009