Rhizome neck 17–42 cm; internodes solid. Culms 2.5–3.5 m, 6–10 mm in diam.; internodes terete, 20–45 cm, obscurely longitudinally ribbed, initially white powdery, glabrous; wall 1.5–2.5 mm thick; supra-nodal ridges level or prominent; sheath scar prominent. Branches 5–9. Culm sheath persistent, triangularly narrowly rounded, ca. 1/2 as long as internodes, leathery, prominently longitudinally ribbed, glabrous; auricles and oral setae absent; ligule truncate, 1–1.4 mm; blade reflexed, linear-triangular or linear-lanceolate. Leaves 3–9 per ultimate branch; sheath glabrous; auricles and oral setae absent; ligule truncate, ca. 1 mm, usually white powdery; blade linear-lanceolate, 7.5–13 × 1–1.3 cm, glabrous, secondary veins 3-or 4-paired, transverse veins slightly distinct, base cuneate, one margin serrulate, other margin smooth. Inflorescence unknown. New shoots Aug.
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