Perennial, with branching scaly rhizomes. Culms solitary, erect, moderately slender to stout, 50–120 cm tall, 1.5–4 mm in diam., nodes bearded or glabrescent. Leaf sheaths loose, densely tuberculate-hispid, rarely subglabrous; leaf blades broadly linear, flat, 6–30 cm × 5–15 mm, tuberculate-hispid on both surfaces, rarely subglabrous, midrib broad, white, apex finely acuminate; ligule 0.3–0.5 mm. Panicle narrowly cylindrical, dense, 6–30(–40) cm; central axis scabrid; branches spikelike, 2–7 cm, erect, arranged in whorls of (1–)2–6, secund, densely spiculate; pedicels short, densely scabrid. Spikelets not gaping, 2.5–3.5 mm; lower glume 2–2.5 mm, 3-veined, hispidulous on veins, apex acute; upper glume 5-veined, usually tuberculate-setose on veins; lower floret staminate, longer than lower glume; upper floret ca. 2 mm, lemma apex narrowed into a poorly developed awn; awn soon deciduous, geniculate with short brown twisted column, 1–1.5 mm; callus shortly pubescent. Fl. and fr. Aug–Oct.
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