Perennial, tufted or shortly creeping. Culms ascending, 10–50(–75) cm tall, 1–2 mm in diam. Leaf sheaths slightly keeled, smooth or scaberulous, upper shorter than internodes; leaf blades flat or folded, 6–15 cm × 2–3(–5) mm, smooth or scaberulous, abruptly acute; ligule 0.7–1(–3) mm. Panicle narrow and contracted when young, later open, 10–27 cm; branches 2–4 at lower nodes, erect at first, later spreading or deflexed, smooth, longest bearing up to 14 spikelets. Spikelets narrowly elliptic-oblong, 6–9 mm, florets 4–8, gray-green or tinged purplish brown; glumes ovate to ovate-oblong, membranous, 1-veined, lower glume 1–2 mm, upper glume 1.8–2.8 mm, apex acute; lemmas ovate-oblong, 2.8–3.6 mm, firmly papery, minutely granular, 7-veined, veins scaberulous, apex membranous, obtuse, often slightly crenulate; palea as long as lemma, keels thick, wingless, scabrid. Stamens 3, anthers 0.85–1 mm. Fl. and fr. Jul–Sep.
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A grass. It keeps growing from year to year and can form tufts or be creeping. It forms roots at the lower nodes. The leaf blades are 10-30 cm long by 2-4 mm wide and can be flat or folded.
It is a temperate plant. It grows in wet places. In Pakistan it grows between 2,000-3,000 m altitude. In Sichuan and Yunnan.
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