Culms 4.5–6 m, 1.6–2.4 cm in diam.; internodes terete, 45–52 cm, longitudinal ribs prominent, initially densely white powdery; wall ca. 3 mm thick; supra-nodal ridges level or slightly prominent; sheath scar prominent, with remains of sheath base, brown ciliate. Branches many per node. Culm sheaths gradually deciduous, triangularly narrowly rounded, shorter than internodes, thick papery to leathery, densely brown or black setose, longitudinal ribs prominent; auricles and oral setae absent or obscure; ligule ca. 3 mm, serrulate; blade revolute. Leaves 3 or 4 per ultimate branch; sheath glabrous; auricles absent; ligule purple, ca. 1 mm, fimbriate at top; blade lanceolate, 17–20 × 1.8–2.3 cm, proximally white ciliate, secondary veins 4-paired. Inflorescence unknown. New shoots Jul–Aug.
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