Annual. Culms tufted, erect or decumbent, slender to moderately robust, 20–120 cm tall, 3–5-noded. Leaf blades flat, thin, 10–25 cm × 4–10 mm, smooth or scabridulous on abaxial surface, margins scabrid, young blades rolled; auricles present or absent; ligule 0.5–2.5 mm, obtuse to truncate. Raceme stiff, straight, 10–30 cm; rachis thick, smooth or scabridulous, spikelets about their own length apart. Spikelets turgid, 0.8–2.5 cm, florets 4–10, rachilla internodes 1–1.5 mm, smooth, glabrous; glume linear-oblong, rigid, as long as spikelet, often exceeding florets, 5–9-veined, margins narrowly membranous, apex obtuse; lemmas elliptic to ovate, turgid at maturity, 5.2–8.5 mm, apex obtuse; awn usually present, stiff, scabrid; palea ciliolate along keels. Caryopsis very plump, length 2–3 times width, 4–7 mm. Fl. and fr. May–Aug. 2n = 14.
Anuales cespitosas. Tallos 20-120 cm. Hojas glabras; aurículas ausentes o hasta 4 mm; lígula 0.5-3 mm; láminas 9-33 cm x 4-10 mm, enrolladas cuando jovenes. Espigas 5-40 cm, rígidas. Espiguillas 8-28 mm; gluma (5.5-)7-30 mm, 3/4-1 1/2 la longitud de la espiguilla, 3-11-nervia; flósculos bisexuales 2-10; flósculos estériles ausentes o hasta 4; lemas 5-8.5 mm, 5-7-nervias, túrgidas cuando maduras, generalmente con una arista hasta 17(-23) mm; anteras (1.8-)2-3.2(-4) mm. 2n=14. Arvenses en cultivos de grano. G (Standley 60916, US); P (D'Arcy et al. 12583 en parte, MO). 1800-2800 m. (Nativa de Eurasia; introducida y naturalizada en climas templados del mundo.)
"Annual; culms solitary or few together, 4–10 dm, scaberulous; lvs usually glabrous beneath, scabrous above, 3–10 mm wide; spike 1–2(–4) dm with scabrous margins; spikelets 4–8-fld; glume firm, straight, strongly veined, equaling or surpassing the uppermost lemma, (12–)15–25 mm; lemmas obtuse, with an awn to 17 mm, or sometimes awnless, the lower lemmas in the spikelet 5–8.5 mm; paleas shorter than the lemmas, grain 2–3 times as long as thick; 2n=14. Probably native to the Mediterranean region, now widespread as a weed and occasionally found throughout most of our range."
Spikes 10-30 cm. long, erect, rigid, pale-green; rhachis stout, somewhat waved, dorsally scaberulous or smooth.
Leaf-laminae 6-30(-40) x 0·3-1·3 cm., linear, tapering to a fine point, with 2 narrow auricles at the base, usually expanded, firm, scaberulous or smooth except for the margins.
Leaf-sheaths prominently striate, rather tight, dorsally rounded, smooth or scaberulous, glabrous; Ligule c. 2 mm. long.
Culms up to 90 cm. tall, 2-4-noded, solitary or tufted, somewhat stout, erect or geniculately ascending, glabrous, smooth or scabrous towards the spike.
Lemmas 6-8 mm. long, 5-9-nerved, muticous or awned, dorsally rounded, elliptic to ovate, somewhat rigid, smooth; awn (if present) up to 20 mm. long, straight, scabrous.
Superior glume 7-9-nerved, as long as or longer than the rest of the spikelet, narrowly oblong, obtuse, rigid, smooth or asperulous.
Spikelets 12-25 x 4-6 mm., 4-10-flowered, elliptic-oblong, oblong or obovate-oblong in outline, moderately compressed about their own length or slightly more apart.
Caryopsis c. 7 mm. long, elliptic-oblong in outline, tightly enclosed by the lemma and palea.
Spikelets oblong, 12–26 mm. long, 4–10-flowered; upper glume usually reaching to or exceeding uppermost lemma, rigid, 7–9-nerved, obtuse; lemmas elliptic to ovate, 6–8 mm. long, smooth, obtuse, awned or awnless.
Spikes erect, 10–30 cm. long and 5–12 mm. wide, rigid, green, the spikelets about their own length or more apart.
Leaf-blades 6–40 cm. long and 3–13 mm. wide, flat, with short spreading auricles at the base.
Culms 30–90 cm. high, tufted or solitary, erect or geniculate at the base, slender to moderately stout.
Annual to 1 m tall. Leaves linear; ligule an unfringed membrane. Inflorescence a simple, true spike; 100-300 mm long. Spikelets 8-28 mm long, laterally compressed, glabrous, awnless, sunk and lying edgeways in partial cavities on main axis, separated by ± own length, one edge against rhachis, green, many-flowered; glumes usually 1, with 2 only in terminal spikelets, as long as spikelet; lemmas rounded, swollen at maturity, awnless or with awn up to 20 mm long.
Robust annual, culms solitary or tufted, up to 0.9 m high. Leaf blades 150-300 mm long, 3-7 mm wide. Spikelets 8-28 mm long, 3-8 mm wide. Glumes ascending or spreading, not concealing spikelets, 3/4 to 1 1/2 times spikelet length; lemmas elliptical to ovate, very turgid at maturity, awn absent or to 20 mm long. Mature caryopsis 2-3 times as long as wide.
Annual to 1 m. Leaves linear. Spikelets in a simple spike, green, 8-28 mm long, lemmas swollen at maturity.
Annual; up to 0.9 m high; robust. Culms solitary or tufted. Leaf blades 150-300 x 3-7 mm. Flowers: panicle a single; flat spike; spikelets 8-28 x 3-8 mm; glumes ascending or spreading; not concealing spikelets; 3/4-1 and1/2 x spikelet length; lemmas elliptical to ovate; very turgid at maturity; awn absent or up to 20 mm long; mature caryopsis 2-3 x as long as wide.
Usually in cultivated or fallow lands, gardens or other disturbed areas, often associated with wheat.
Dry Grassland. Cultivated or fallow lands; gardens or other disturbed areas; often associated with wheat.