Culms erect, 15–25 cm tall. Leaf sheaths pubescent, auriculate, auricles linear, reflexed; leaf blades gray-green, usually convolute, abaxial surface smooth, adaxial surface scabrid; ligule densely puberulous. Panicle contracted, racemose; branches erect, 1–1.5 cm, much shorter than spikelets. Spikelets 2.5–3.5 cm, florets 5–11; lower glume 8–10 mm, 1–3-veined, upper glume 10–13 mm, 3–5-veined; lemmas elliptic-lanceolate, lowest 1.5–1.7 cm, purple with brown apex, faintly 7–13-veined, back glabrous, margins ciliolate toward apex, apex obtuse or emarginate; palea 2/3 lemma length. Fl. and fr. Jun–Aug.
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