Astragalus amnis-amissi Barneby sp. nov.
Annotated by R. C. Barneby, Jul 1957. Remarks: Holotype!

Idaho: Custer County: [locality and coordinates withheld; status in Idaho: S3 (Rare; IDNHP)],
Along base of cliffs and in rock crevices. Plants with several spreading-ascending stems from a branched crown and a long thick taproot, not at all rhizomatous; corolla white, heavily tinged with purplish-blue, the banner erect; pods (mature only on one plant growing in full sun in a crevice) moderately inflated, obcompressed and thicker than broad, cordate in section, the lower suture intruded to about half way partition the locule. Drawings of flower and fruit on label. Phenology: Flowers & Fruits. Holotype: Astragalus amnis-amissi Barneby. Published 1961. Vascular Plants of the Pacific Northwest 3: 219. 1961.

C. Leo Hitchcock 21331, Jul 2, 1957
With C. V. Muhlick
WTU, Accession: 171015, Barcode: WTU-V-000438