Agropyron dasystachyum (Hook.) Scribn. & J.G. Sm. var. riparium (Scribn. & J.G. Sm.) Bowden
[= Elymus lanceolatus ssp. riparius]
Annotated by Charles F. Williams, 8 May 2018. Sources: IMF. Remarks: ID'd with P. Reschke

Idaho: Lemhi County: At quartzite outcrop at the mouth of Sawmill Canyon just west of Sawmill Creek in Little Lost River valley on west base of Lemhi Range Elev. 6800 ft.
44.3139° N, 113.34095° W
Datum: NAD 83. Uncertainty: 4 meters. Coordinate Source: Specimen Label.
Riparian area dominated by Populus trichocarpa, Alnus sinuata, Amelanchier. Rhizomatous; leaf blades glaucous, involute, short erose ligules, large papery auricles; inflorescence a spike, 3-5 florets per spikelet, 1 spikelet per node, internodes on rachis . 5 mm; glumes oblong-lanceolate, acute, broadest past middle, awnless, anther 4 mm.

Don H. Mansfield 16185, Jun 18, 2016
With B. McCoy, E. Hilpman, W. Basom
SRP, Accession: 65543