Densely caespitose perennial with short oblique rhizome; culms up to 120 cm tall, erect; lowermost leaf sheaths persistent, chartaceous; leaf laminas 3–15(20) cm × 1–5 mm, the lowermost flat, the uppermost involute.
Spikelets 2–3 mm long; lemma 1.1–1.4 mm long, elliptic to ovate-elliptic, glabrous; palea glabrous.