Perennial plants (3–) 10–18 (–42) cm high, glabrous or variously hairy with simple and tuberclebased hairs on culms and foliage; base thickened, pubescent or sometimes woolly. Culms simple; nodes glabrous or pubescent. Leaves: sheaths shorter than culm internodes; blade 15 cm long, setaceous, scabrous-papillose with bladder-like vesicles. Panicles usually dense, to 5 cm long, 1–4 cm wide, sometimes with only 5 spikelets. Glumes 5–8 mm long, muticous or cuspidate, 9–13-nerved, smooth, glabrous or rarely pilose. Florets exceeding glumes by 1–3 mm; lemma divergent, often recurved; palea divergent. Callus entirely bearded or with glabrous tip. Lemma 6–10 mm long, acuminate, muticous, indurated to cartilaginous and hirsute in lower 1/2–2/3; upper part with 5–7 thickened nerves, grooved and membranous or hyaline between nerves, glabrous, scabrous. Palea entire or bifid, long-acuminate and beaked, muticous, hirsute in lower half, glabrous and scabrous above. Caryopsis 1.8–2.5 mm long.
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