Culms 13–18 m, 10–15 cm in diam.; internodes 36–43 cm; wall 3–3.5 cm thick. Culm sheaths deciduous, orange-brown, leathery; auricles absent; ligule 6–10 mm, serrulate; blade reflexed. Leaf sheaths initially slightly hairy, becoming glabrous, margins ciliate; ligule ca. 1 mm; blade 25–40 × 3–5.5 (–10) cm. Pseudospikelets 2–15 per node. Spikelets 1–1.2 cm; florets 4 or 5. Glumes 2; lemma 7–11 mm, margins undulate, apex mucronate; palea 6–8 mm, 2-keeled, 2-veined between keels, apex acute. Anthers yellow, 3–3.5 mm, apex mucronate. Pistil ca. 1 cm; stigma 1. Fruit unknown.

* Yunnan.