Plants to 2 m tall, shortly rhizomatous. Leaves: ligule 1–6 mm long, obtuse, sometimes broadly laciniate, membranous; auricles 1–1.5 mm long, thickened, glabrous; blade expanded or weakly rolled, to 25 cm long, 1–9 mm wide, strongly ribbed, glabrous or scabrous or sparsely hairy, with margins glabrous to minutely scabrous. Inflorescence to 40 cm long, open, with distant fascicles of unequal, few-flowered branches. Glumes unequal, 7.5–15 mm long, acuminate. Callus 0.5–1 mm long, almost straight, sharp, densely sericeous. Lemma 4.5–6 mm long, granular, dark brown, white-sericeous; coma absent; lobes 0.1–0.2 mm long, or absent; awn 0.1–0.2 mm wide near base, 60–90 mm long, with column scabrous and bristle flattened (distinctly wider at base than column), falcate, scabrous on edges. Palea 60–80% of length of lemma, acute. Lodicules 3, acute.
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