Culms 3–4 m, 0.6–1 cm in diam.; internodes initially gray-green, terete, 11–17 cm, densely white powdery, gray setose; wall 2–3 mm thick; supra-nodal ridges weakly prominent; sheath scar prominent. Branches 6–10 per node, deflexed. Culm sheaths persistent, narrowly rounded, leathery, yellow-brown setose, longitudinal ribs prominent, margins initially ciliolate, apex triangular; auricles and oral setae absent; ligule truncate, ca. 1 mm, margins initially densely yellow-brown ciliate; blade readily deciduous, reflexed, linear-lanceolate, glabrous, margins dentate-serrulate. Leaves 3–5 per ultimate branch; sheath margins gray-yellow ciliolate; auricles nearly falcate, small; oral setae few, radiating, ca. 1 mm; ligule purple, truncate, ca. 1 mm, margin initially ciliolate; blade narrowly lanceolate, 5–9.2 × 0.5–0.8 cm, abaxially densely pilose, secondary veins 3-paired, transverse veins weakly prominent, base cuneate or broadly cuneate, one margin spinescent-serrulate, other margin obscure. Inflorescence unknown. New shoots Jul.
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