Perennial with slender rhizomes clothed in imbricate, ovate, appressed-pubescent scales. Culms slender, ascending, 60–170 cm tall, glabrous. Leaf sheaths glabrous, long ciliate along margins and at mouth; leaf blades linear-lanceolate, thin, 5–38 × 0.5–2 cm, glabrous or rarely papillose-pilose, base rounded, margins scabrous, apex attenuate; ligule ca. 0.5 mm, densely ciliate. Panicle open, linear to narrowly pyramidal, 12–30 cm, slightly nodding, branches spaced, stiffly spreading, lowest 1–2.5(–5) cm, most spikelets subtended by a single bristle; axis scabrous, sometimes also hispid; bristles 4–10 mm. Spikelets plumply elliptic, ca. 3 mm, acute; lower glume ovate, 1/3–1/2 as long as spikelet, acute; upper glume 3/4 as long as spikelet, 5(–7)-veined; lower floret neuter, as long as upper floret; lower lemma 5-veined; lower palea narrowly lanceolate, shorter than its lemma; upper lemma finally light brown, smooth, shiny, acute. Fl. and fr. Aug–Oct. 2n = 36.
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