Rhizome neck 18–55 cm; internodes solid. Culms 2–3.5 m, 1–1.3 cm in diam.; internodes terete, 23–32 cm, initially thinly white powdery, especially below nodes; wall 2–5 mm thick; supra-nodal ridges level; sheath scar prominent. Branches 5–20 per node. Culm sheath persistent, triangularly narrowly rounded, 1/3–1/2 as long as internodes, thinly leathery, prominently longitudinally ribbed, appressed yellow or brown clavate-setose, margins initially ciliolate; auricles absent; oral setae 1 or 2 initially, erect, gray, 3–4 mm; ligule truncate or convex, ca. 1 mm; blade reflexed, triangular or linear, glabrous, margins rolled. Leaves 4–7 per ultimate branch; sheath glabrous; auricles absent or small; oral setae 3 or 4, yellow, 1.5–4 mm; ligule truncate, initially hairy; external ligule initially puberulous; blade lanceolate, 10–24 × (0.8–)1.4–3.1 cm, abaxially densely gray pubescent, secondary veins 4- or 5-paired, transverse veins not prominent, base cuneate, margins serrulate. Inflorescence unknown. New shoots Sep.

* About 2300 m. S Yunnan.