Rhizome neck ca. 10 cm. Culms 8–12 m, 2–3.5 cm in diam.; internodes terete, 15–45 cm, glabrous; wall 3–5 mm thick; supra-nodal ridges level; sheath scar prominent, with persistent remains of sheath base. Branches many per node. Culm sheaths narrowly triangular, leathery, initially yellow-brown setose, longitudinal ribs distally prominent, margins yellow-brown setose, apex linear-triangular; auricles present or absent; oral setae yellow-brown, curved, 4–16 mm; ligule truncate or convex, 1–2 mm, margins densely yellow-brown ciliate, cilia 1–5 mm; blade reflexed, linear-lanceolate, slightly rugose, glabrous, margins usually rolled, serrulate. Leaves 3–5 per ultimate branch; sheath margins ciliate; auricles absent; oral setae few, erect, yellow, 3–5 mm; ligule truncate, ca. 1 mm, glabrous; external ligule white-gray pubescent; blade linear-lanceolate, 4.5–8 × 0.5–0.8 cm, thin, abaxially gray pubescent at base, secondary veins 2–4-paired, transverse veins obscure, base cuneate, margins spinescent-serrulate. Inflorescence unknown. New shoots Jun.
Wetter temperate mixed coniferous forests, often associated with hemlock; at elevations from 2,600-3,200 metres in central and eastern Bhutan.
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