Culms tufted, 30–70 cm tall, 3-or 4-noded, glabrous. Leaf sheath brown at base, glabrous, margin membranous, sometimes ciliolate; ligule ca. 0.5 mm; leaf blade usually rolled, 6–15 × 0.1–0.3 cm, abaxial surface glabrous, adaxial surface scabrous or puberulent. Spike erect, 4.5–14 mm; rachis hairy at nodes, margin ciliate; internodes 6–15 mm. Spikelets purplish or glaucous, usually 1 per node, with 3–5 florets. Glumes subulate or narrowly lanceolate, subequal, 7–10 mm, veinless or 1-veined, glabrous or pilose, margin scabrous, apex acuminate. Lemma oblong-lanceolate, 5-veined, awnless or mucronate. Palea subequaling lemma, ciliolate along keels or glabrous. Anthers purplish or yellowish, 3–4 mm. Fl. and fr. summer.
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