Annual 1-5 dm, the culms solitary or clustered; lvs 3-8 mm wide, rough on the margins and often also on the surface; ligule lanceolate, 3-6+ mm; infl 5-15 cm, lax, freely branched; spike lets numerous, triangular-ovate, 3-5 mm, 4-8-fld; glumes 2-3.5 mm, 3-5-veined; lemmas 1.5-2 mm; 2n=10. Native of Europe, occasionally found in waste places in our range from se. N.Y. southward.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.