Plants annual. Culms 80-110 cm, erect. Lower
sheaths densely, softly appressed-hairy; ligules 1-1.5 mm, hairy, obtuse, erose; blades 10-20 cm long, 2-6 mm wide, coarsely pilose on both
surfaces. Panicles 11-30 cm long, 4-20
cm wide, open, erect or nodding; branches
usually longer than the spikelets, ascending to widely spreading, slender,
slightly curved or straight. Spikelets
10-25 mm, lanceolate, terete to moderately laterally compressed, often
purple-tinged; florets 4-10, bases concealed
or visible at maturity; rachilla
internodes concealed or visible at maturity. Glumes glabrous; lower
glumes 4-6 mm, 3-veined; upper
glumes 5-8 mm, 5-veined; lemmas
7-9 mm long, 1.1-1.5 mm wide, lanceolate, obscurely 7-veined, rounded over the
midvein, glabrous, coriaceous, margins slightly angled, inrolled or not at
maturity, apices acute, bifid, teeth shorter than 1 mm; awns 6-11 mm, straight, arising at varying distances below the
lemma apices; anthers 2.5-5 mm. Caryopses shorter than the paleas,
weakly to strongly inrolled. 2n = 14.
Bromus arvensis grows along roadsides
and in fields and waste places. It is native to southern and south-central
Europe.
Annual 3-10 dm, the culms glabrous; sheaths with scattered hairs; blades 10-20 cm נ2-6 mm, flat, sparsely hairy; panicle 15-30 cm, erect or eventually nodding, with long, slender, ascending to suberect branches; spikelets 10-25 mm, 4-10-fld; first glume 4-6 mm, 3(5)-veined, the second 6-8 mm, 5- or 7-veined; lemmas 7-9 mm, with a straight awn 6-10 mm; palea about equaling the lemma; anthers (3-)4-5 mm; 2n=14. Native of s. Europe, sparingly intr. in our range and elsewhere in the U.S.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.