Plants 0.6–1 m tall, with shoots extravaginal. Culm nodes 2 or 3, rarely exserted, usually glabrous, thickened. Leaves: sheaths tight, lowermost villous, upper sheaths puberulous, scaberulous or glabrous; ligule 0.8–4 mm long, ovate to truncate, ciliate or glabrous, thinly coriaceous; auricles thickened, spreading, hirsute with a dense line of long white hairs; blade sinuous, usually inrolled and 0.5–1.5 mm wide, occasionally expanded, to 3 mm wide, strongly ribbed and usually hirsute to pubescent on adaxial surface. Inflorescence to 35 cm long, open, sparse; spikelets gaping. Glumes unequal to almost equal, 13–20 mm long, acuminate. Callus 2.1–3.1 mm long, straight, with dense white to pale yellow hairs. Lemma 7–8 (–9) mm long, granular, tuberculate at apex, black-brown at maturity, with white hairs; coma obscure or absent; lobes usually 2, to 0.4 mm long; awn 70–85 (–120) mm long, with column 11–16 (–20) mm long, densely pubescent to villous, and bristle very strongly falcate, scaberulous. Palea 0.3–1.3 mm shorter than lemma, acute to obtuse. Lodicules 2, long-spathulate.
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