Publication: Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 74: 6. 1947.
selected vouchers: WTU
Notes: FNA24: "Leymus flavescens grows on sand dunes and open sandy flats, and ditch- and roadbanks, of the Snake and Columbia river valleys [MARY: there are also 3 Montana counties shown on the map. KMC]. The central Washington population is growing on a road cut; it seems to be well established there.
Plants identified as Elymus arenicolus Scribn. & J.G. Sm. have less densely pubescent lemmas than other specimens. Leckenby, the collector of the type specimen, noted that they grew on sand or sand drifts along the Columbia River, but could not withstand flooding. He could find no seed. Such specimens are included here, but they may represent hybrids between L. flavescens and L. triticoides."