Elymus elymoides (Raf.) Swezey × Pseudoroegneria spicata (Pursh) Á. Löve
Remarks: (= ×Pseudelymus saxicola)

Idaho: Butte County: Big Lost River Valley, N of Arco, Beaverland Pass Road, 1.2 mi from King Mountain Rd. Elev. 6062 ft.
43° 45.265' N, 113° 18.281' W; T5N R26E S13 SE
Stems in clumps. Phenology: Fertile.

J. F. Smith 5513, May 24, 2005
ID, Accession: 153012, Barcode: ID022564