Culms 3–4 m tall, 1.3–3 cm in diam.; internodes 25–38 cm, glabrous, with a ring of white powder below nodes; wall 2–3 mm thick; nodes not prominent; sheath scar slightly prominent, ± yellow hispid. Branches many, subequal. Culm sheath deciduous, one side smooth and flat, the other side rugate, abaxially ± hispid at base, apex concave, unequal, 2 shoulders rotund; auricles narrow; oral setae present, erect; ligules ca. 1 mm, margin fimbriate; blades reflexed, lanceolate. Leaves 3 or 4 in ultimate branches; leaf sheaths glabrous, auricles falcate, small, oral setae radiate; blades 3.5–15 × 0.8–2.5 cm, glabrous adaxially, white puberulous abaxially; secondary veins 4–6 pairs. Inflorescence unknown.
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