Culms erect or geniculate at base, to 120 cm tall, 4-or 5-noded. Leaf sheath smooth; leaf blade flat, 10–20 × 0.6–1.4 cm, both surfaces scabrous or abaxial surface smooth and adaxial surface pilose. Spike erect, usually dense, 8–15 × 0.8–1 cm; rachis margin ciliolate. Spikelets usually 2 per node, green or slightly purplish, 9–15 mm, with 3 or 4 florets. Glumes lanceolate or linear-lanceolate, 7–10 mm, obscurely 5-veined, scabrous or hirsutulous along veins, apex acuminate or with awn 1–3 mm. Lemma lanceolate, glabrous, or hirsutulous distally; first lemma 8–12 mm; awn erect, (3–)5–11 mm. Palea equaling lemma, ciliate along keels, apex narrowly obtuse. Fl. and fr. late summer. 2n = 42.
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