Perennial to 0.5 m tall. Leaves: ligule 1–10 mm long, laciniate, with woolly cilia; blade usually rolled, to 30 cm long, 2–3 mm wide, rigid, strongly ribbed on adaxial surface with short hairs on ribs, strongly scabrous on margins. Inflorescence 13–19 cm long, delicate and open; spikelets narrowly gaping at maturity and widely gaping after floret disarticulation. Glumes subequal, 9–11 mm long, acute to shortly acuminate, chartaceous at tip. Callus 2–2.7 mm long, sericeous. Lemma 5–6 mm long, dark brown with yellow nerves, antrorsely scabrous on neck, glabrous or very sparsely hairy; coma 1–1.5 mm long; awn 50–70 mm long, gently twice-geniculate. Palea subequal to lemma, acute to obtuse. Lodicules 3, oblong.
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