Perennials, loosely tufted, weakly stoloniferous; shoots extra-and intravaginal. Culms 20–60 cm tall, 0.6–1.4 mm in diam., erect or obliquely ascending, smooth, glabrous, nodes 2 or 3, 1 or 2 exserted. Leaf sheaths loose, smooth, glabrous, 5–10 cm, slightly shorter than blade, uppermost closed for 1/4–1/3 of length; blade flat or folded, thin, 5–14 cm × 1–5 mm, adaxially sometimes scabrid, margins scabrid, apex slender prow-tipped or mucronate; ligule 2.5–5 mm, abaxially smooth, apex obtuse. Panicle open, lax, 8–25 cm, longest internodes 2.2–4 cm; branches widely spreading, flexuous, 2 per node, slender, proximally smooth, distally scabrid angled, longest 3.5–7 cm with 9–20 spikelets in distal 1/2. Spikelets elliptic to oblong, green or grayish, 4–6 mm, florets 3–6; vivipary absent; rachilla smooth, glabrous or pilulose; glumes subequal or lower to 1.5 mm shorter, scabrid only on keel, apex acuminate, faintly or not evidently punctate-papillate, lower glume lanceolate to elliptic, 2.7–3.9 mm, 1(or 3)-veined, upper glume oblong, 3–4.5 mm, faintly 3-veined; lemmas oblong, very thinly papery, 3–4.5 mm, apex acute, keel villous for 3/4 of length, marginal veins to 1/2, intermediate veins prominent, areas between softly pilulose; callus webbed; paleas shorter than the lemma, keels scabrid, medially pilulose. Anthers 0.7–1.2 mm. Fl. and fr. Jul–Sep.
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