Plant forming loose mats, shortly rhizomatous, base clothedin papery old sheaths. Culms solitary or few, erect, 10–40 cm tall, 2–3-noded. Leaf sheaths smooth, glabrous, longer than internodes, upper slightly inflated; leaf blades glossy, basal inrolled, 20–30 cm, 2–3 mm wide, culm blades shorter, flat; ligule 1–2 mm. Panicle contracted, oblong or ovate in outline, 1.5–4 × 1–2 cm; branches short, paired. Spikelets broadly oblong, 5–6 mm; glumes subequal, as long as spikelet, lower 1–3-veined, upper 3–5-veined; lower florets staminate, lemmas scabrid-pubescent on back, hispid toward apex, margins ciliate; first lemma emarginate with 1–3 mm, straight subapical awn; second lemma 2-cleft to middle or below, awned from sinus, awn weakly geniculate, 4–7 mm; bisexual floret ca. 4 mm, pilose toward apex; palea 1-veined, ciliolate along upper part of vein; anthers ca. 2.5 mm. Fl. and fr. Jul–Aug. 2n = 56 (also 58, 63, 64, 66, 68, 71, 72, 74–78).
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