Bromus tectorum L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Annual 2–7 dm; sheaths and blades soft-hairy, the latter 2–4 mm wide; ligule 1–2.5(–4) mm; infl 1–2 dm, often nodding, repeatedly but rather openly branched, bearing somewhat crowded, mostly drooping, 3–8-fld spikelets to 2(–3.5) cm on slender pedicels; glumes subulate, the first 5–7 mm, 1-veined, the second 8–11 mm, 3-veined; lemmas narrowly lanceolate, 8–12(–15) mm, evidently hairy or seldom glabrous, 1–1.5 mm wide in side-view, 5–7-veined, acuminate into slender scarious teeth 1–3 mm; awns (7–)10–17 mm; palea shorter than the lemma; anthers 0.5–0.7 mm; 2n=14. Native of Europe, now a common weed nearly throughout the U.S., esp. westward.
Junegrass, downy chess