Perennial. Culms slender, stiffly erect or with a shortly decumbent rooting base, 30–80 cm tall, paler below the nodes but not glandular. Leaf sheaths shorter than internodes, glabrous except for stiffly ciliate outer margin; leaf blades broadly linear, suberect to ascending, 5–15 × 0.3–1 cm, glabrous to thinly hispid, margins prominently thickened, apex acuminate; ligule 2–3 mm. Panicle open, elliptic to ovate in outline, 5–14 × 2–8 cm, glandular; primary branches inserted singly, obliquely spreading, scaberulous, branchlets and pedicels capillary, flexuose, smooth. Spikelets globose, 1.9–2.2 mm, pale; florets similar; glumes equaling spikelet or a little shorter, broadly ovate, deeply concave, 7–9-veined, papillose-hispid or with only a few apical bristles or glabrous, apex rounded but margins incurling; lemmas strongly plano-convex, minutely roughened, subglabrous or pubescent with slightly longer hairs toward apex.
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