Rhizome neck 17–58 cm. Culms 2–4 m, 0.6–1 cm in diam.; internodes gray-green, terete, 18–29 cm, thinly white powdery, glabrous; wall 2–3 mm thick, rigid; supra-nodal ridges level or weakly prominent; sheath scar prominent, woody, initially retrorsely setose. Branches 1 at lower nodes and more than 3 at upper nodes. Culm sheaths persistent, yellow-brown, narrowly rounded-triangular, 1/3–2/5 as long as internodes, leathery, densely setose, margins densely ciliate; auricles purple, falcate, 6–7 mm, 1.5–3 mm in diam.; oral setae many, ca. 2 cm; ligule 1–2 mm, glabrous; blade erect or decumbent, narrowly triangular or elliptic-lanceolate. Leaves 3–9 per ultimate branch; sheath glabrous, usually white powdery; auricles falcate; oral setae radiating, ca. 6 mm; ligule arcuate, 1–2 mm; blade linear-lanceolate, 7–19 × 1.6–2.6 cm, basally gray hairy, secondary veins 3–6-paired, transverse veins distinct, base cuneate, margins sparsely serrulate. Inflorescence unknown. New shoots Aug.
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