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Annual. Culms tufted, usually ascending, infrequently erect, up to 15(–40) cm tall. Leaf sheaths loosely to densely pilose; leaf blades lanceolate, flat, rather stiff, glaucous, 1–12 cm, 3–4 mm wide, loosely pilose, margins scabrous-pectinate, apex acuminate; ligule ca. 1 mm. Raceme 2–4 cm, spikelets 1–3 crowded at apex of peduncle. Spikelets 2–3 cm, laterally compressed, florets 10–16; glumes pilose or glabrous, apex acute, lower glume lanceolate, 5–6 mm, 5-veined, upper glume lanceolate-oblong, 7–8 mm, 7-veined; lemmas 7.5–10 mm, glabrous, thinly setose or pubescent; awn 7–15 mm. Anthers 0.5–1 mm.
Slender to fairly robust, tufted annual 100-500(-700) mm high; leaves mostly cauline; culms often decumbent and branching near base. Leaf blade 20-90 x 5 mm, rigid or soft, rough, young leaves erect, old leaves curly. Inflorescence (10-)30-90(-100) mm long, with 2-6 spikelets. Spikelet 10-35(-40) x 1.5-6.0 mm; lemma awn 10-25 mm long; anther 0.8-2.7 mm long.
Annual to 45 cm. Leaves linear. Spikelets sessile, 2-6 in distichous racemes, lemma awn 10-25 mm long.
