Plant with slender creeping rhizomes. Culms 20–60 cm tall, 3–4-noded. Leaf sheaths glabrous or ± pubescent, longer than internodes; basal leaf blades up to 30 cm, 3–10 mm wide, culm leaves much shorter, glabrous or adaxial surface puberulous, margins scabrid, apex acuminate; ligule 2–5 mm, obtuse. Panicle pyramidal, loose, 4–10 cm; branches spreading, smooth, bare in lower half. Spikelets plumply elliptic, 3.5–6 mm, light brown, shining; glumes subequal, as long as spikelet, 1–3-veined; callus of staminate florets stiffly hairy (or glabrous in E Asia); lower florets staminate, lemmas slightly shorter than glumes, puberulous on back above middle, margins shortly ciliate, apex acute or minutely mucronate; bisexual floret ca. 3.5 mm, appressed-pubescent toward apex; palea 1-veined; anthers ca. 2.5 mm. Fl. and fr. Jun–Sep.
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