Culms to 5 m, 2–3 cm in diam.; internodes ca. 30 cm, initially brown hispid, white powdery below nodes; wall thick, cavity narrow; nodes prominent. Culm sheath initially green, glaucous, glabrous or initially sparsely setose, base densely brown crinite or white hairy, margins densely ciliate, apex acute; auricles falcate, subamplexicaul; oral setae erect, 1–1.5 cm; ligules truncate or prominent; blade reflexed at culm base, linear, slightly hairy, margins serrulate. Leaves 3 or 4(or 5) per ultimate branch; sheath obviously striate, ca. 4 cm, glaucous, transverse veinlets distinct; auricles ovate or elliptic; oral setae erect, straight, ca. 1.3 cm; ligules arcuate, 1–4 mm, glaucous, ciliate; petiole 2–5 mm; blade elliptic-lanceolate, 7–16 × 1–2.5 cm, glabrous or abaxially hairy proximally, secondary veins 5-or 6-paired, base rounded, ± oblique, apex acute, extended. Inflorescence unknown. New shoots May–Jun.
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