Plants to 1.5 m tall, sometimes shortly rhizomatous. Leaves: ligule 2.5–6 mm long, truncate, obtuse or laciniate, membranous; auricles 1–2 mm long, thickened, glabrous; blade expanded or loosely inrolled, to 40 cm long, 3–10 mm wide, strongly ribbed, glabrous to scaberulous, with margins glabrous. Inflorescence to 50 cm long, open, with distant fascicles of unequal few-flowered branches. Glumes unequal, 6–10 mm long, obtuse to acuminate. Callus 1–1.5 mm long, fine and straight, sharp. Lemma 4.5–6.5 mm long, finely tuberculate, dark brown, with white hairs; coma obscure, 0.3–0.6 mm long; lobes 0.2–0.5 mm long, or absent; awn slightly once-or twice-geniculate, 30–90 mm long, with column pubescent and bristle straight, round-triangular in cross-section and not wider than column. Palea equal in length to lemma, acute. Lodicules 2, obtuse.
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