| Fabaceae | |
Astragalus mollissimus var. bigelovii
| (A. Gray) Barneby | Mem. New York Bot. Gard. 13: 742 | 1964 |
| Fabaceae | |
Astragalus mollissimus var. bigelovii
| (A. Gray) Barneby | Mem. New York Bot. Gard. 13(2): 743 | 1964 |
| Fabaceae | |
Astragalus mollissimus var. coryi
| Tidestr. | Proc. Biol. Soc. Washington 50(7): 21 | 1937 |
| Fabaceae | |
Astragalus mollissimus var. earlei
| (Greene ex Rydb.) Tidestr. | Proc. Biol. Soc. Washington 48(9): 40 | 1935 |
| Fabaceae | |
Astragalus mollissimus fo. flavus
| McGregor | Rhodora 62(736): 116 | 1960 |
| Fabaceae | |
Astragalus mollissimus var. irolanus
| (M.E. Jones) Barneby | Mem. New York Bot. Gard. 13: 740–741 | 1964 |
| Fabaceae | |
Astragalus mollissimus var. marcidus
| (Greene ex Rydb.) Barneby | Mem. New York Bot. Gard. 13: 743 | 1964 |
| Fabaceae | |
Astragalus mollissimus var. marcidus
| (Greene ex Rydb.) Barneby | Mem. New York Bot. Gard. 13(2): 744 | 1964 |
| Fabaceae | |
Astragalus mollissimus var. matthewsii
| (S. Watson) Barneby | Mem. New York Bot. Gard. 13: 746 | 1964 |
| Fabaceae | |
Astragalus mollissimus var. mogollonicus
| (Greene) Barneby | Mem. New York Bot. Gard. 13: 745 | 1964 |
| Fabaceae | |
Astragalus mollissimus var. mollissimus
| | | |
| Fabaceae | |
Astragalus mollissimus var. nitens
| Barneby | Mem. New York Bot. Gard. 13: 739–740, map 97 | 1964 |
| Fabaceae | |
Astragalus mollissimus var. thompsoniae
| (S. Watson) Barneby | Mem. New York Bot. Gard. 13: 747 | 1964 |