Culms loosely to densely tufted, 30–50 cm tall, erect, usually hard, scabrid, nodes 2–5, uppermost in lower 1/3; base covered by withered leaf sheaths. Shoots extravaginal. Leaf sheath scabrid, longer than blade; blade usually flat, later folded or inrolled, 1.5–2.5 mm wide, scabrid; ligule (0.5–)1–1.5 mm. Panicle oblong, conferted, 8–16(–20) cm, branches thin, 2–4.5 cm. Spikelets elliptic-lanceolate, green or tinged with purple, 4–6(–6.5) mm, florets 3 or 4, usually with upper floret rudimentary; rachilla usually glabrous; glumes oblong-lanceolate, apex acuminate, lower glume ca. 3.5 mm, upper glume 4–4.2 mm, margins dry membranous, keel scabrid; lemma oblong-lanceolate, 3.2–4 mm; margins membranous, keel and marginal veins usually short-villous to glabrous along lower 1/2; callus glabrous. Anthers ca. 2 mm. Fl. Jun–Aug.
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