Bromus inermis Leyss.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Culms 5–10 dm from long rhizomes with dark brown scales; stems, sheaths, and blades glabrous, or the stems finely pubescent at the nodes; blades 8–15 mm wide; auricles vestigial or none; ligule 0.5–1 mm; infl 1–2 dm, open at anthesis, later contracted, often with 4–10 branches from a node; spikelets 15–30 mm, ca 3 mm wide, 7–11-fld; first glume 4–8 mm, 1-veined, the second 7–11 mm, 3-veined; lemmas 10–12 mm, 3- or 5-veined, the outer pair of veins often inconspicuous, the body obtuse or retuse, glabrous or scabrous, awnless or with an awn to 2.5 mm; 2n=28, 42, 56, 70. Native of Europe, cult. for forage and often escaped; Que. to Minn., Alta., and the Pacific, s. to Md., O., Mo., and N.M.