| Name | Astragalus whitneyi var. siskiyouensis (P. A. Rydberg) Barneby |
| Authorship | (P. A. Rydberg) Barneby |
| Rank | Variety |
| Placed in | Astragalus whitneyi A. Gray |
| Holdings | 9 Specimens held in the Harvard University Herbaria identified as Astragalus whitneyi var. siskiyouensis (P. A. Rydberg) Barneby |
| Identification made in | [no date] (7), 1982 (2) |