Perennial, densely tufted from tough rootstock. Culms wiry, 30–70 cm tall, 1–1.5 mm in diam., 2–4-noded. Leaf sheaths glabrous, lower longer than internodes; leaf blades setaceous, convolute, 10–25 cm, ca. 0.8 mm wide, abaxial surface smooth, adaxial surface pubescent; ligule truncate, ca. 0.3 mm. Panicle contracted, narrow, 10–20 cm; branches 2 to several per node, laxly suberect, delicate, 2–7 cm, with spikelets to base. Spikelets 5–7 mm, greenish or purplish; glumes subequal, elliptic-lanceolate, 3-veined, membranous, smooth, apex acute; callus obtuse, 0.3–0.4 mm; lemma 4–5 mm, membranous, pilose throughout, apex 2-toothed, teeth 0.3–0.4 mm; awn persistent, 2–3 cm, very fine, weakly 2-geniculate, column twisted, scabrid throughout; palea 2/3 length of lemma. Anthers 2.8–3.5 mm, bearded at apex. Fl. and fr. Jul–Sep.
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