| Name | Astragalus calycosus var. monophyllidius (Rydberg) Barneby |
| Authorship | (Rydberg) Barneby |
| Rank | Variety |
| Placed in | Astragalus calycosus Torrey ex S. Watson |
| Citation | 1942 Leafl. W. Bot. 3(5): 107 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Astragalus calycosus var. monophyllidius (Rydberg) Barneby |
| Identification made in | [no date] (1) |