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Annual or biennial, erect. Culms 46–79 cm high. Leaves: basal sheaths glabrous; blade 10–20 cm long, 4–6 mm wide, adaxially pubescent to hirsute, abaxially glabrous. Panicles erect, contracted, 10.5–15.5 cm long; primary branches spreading. Spikelets erect, narrowly ovate or oblong, 10–25 mm long, with 6–11 bisexual florets; pedicel 5–35 mm long. Glumes subequal, keeled, with midnerve scaberulous towards apex and intercostal regions glabrous; lower glume 5–5.5 mm long, 3–5-nerved; upper glume 5.8–6.5 mm long, 7-nerved. Callus blunt, glabrous. Lemma slightly laterally compressed, 7–8 mm long, becoming tightly incurved marginally, dorsally rounded, 7-nerved, glabrous; awn subapical, arising 0.5–1 mm below lemma tip, 4.5–7.5 mm long, slightly curved or straight, entered by 3 nerves. Palea equalling or shortly exceeding lemma, glabrous. Anthers 0.8–2 mm long.
Annual. Culms stout, erect, 30–60(–100) cm tall. Leaf sheaths usually glabrous; leaf blades 5–15 cm × 3–6 mm, pubescent; ligule 1–2 mm. Panicle lax, 5–15 × 2–6 cm, oblique, nodding; branches subwhorled, up to 8 cm, each bearing 1–4 spikelets. Spikelets narrowly oblong, 15–20 × 6–8 mm, florets 5–15, not overlapping at maturity; rachilla internodes exposed; glumes subequal, firm, veins inconspicuous, scabrid, lower glume 4–5 mm, 3–5-veined, upper glume 6–7 mm, 7-veined, apex obtuse, mucronate; lemmas elliptic, 8–9 × 4–5 mm in side view, herbaceous, 7-veined, glabrous, margins inrolled, apex obtuse, awned from back below apex; awn 5–7 mm, shorter than lemma body, slightly reflexed; palea as long as or slightly shorter than lemma. Anthers ca. 2 mm. Caryopsis ca. 5 × 1 mm, longitudinally inrolled, brownish red. Fl. and fr. May–Aug. 2n = 28.
A grass. It grows each year from seeds. The culms are stout and erect. They are 30-60 cm tall. The leaf baldes are 5-15 cm long by 3-6 mm wide. The flowers are in a loose panicle. It is 5.15 cm long by 2-6 cm wide. It is nodding.
