Culms 5–10 m, 3–5 cm in diam.; internodes 20–50 cm, initially white powdery, hairy, later concavely tuberculate; wall 5–8 mm thick; nodes flat; sheath scars corky, initially with a ring of dense, brown hairs. Branches many from distal nodes, subequal. Culm sheaths deciduous, ca. 1/2 as long as internodes or less, leathery, finely white powdery, initially minutely golden or brown hispid, apex truncate; auricles minute; oral setae 3–5 mm; ligule 1–2 mm, serrulate; blade reflexed or horizontal, base ca. 1/3 as wide as sheath apex, adaxially hispidulous. Leaf sheaths glabrous; auricles usually minute; oral setae minute; blade lanceolate, 5–16 × 0.8–1.6 cm. Pseudospikelets 1.3–1.8 cm; florets 4–6. Glumes 1 or 2; lemma 8–10 × 8–10 mm; palea about as long as lemma. Anthers 5–6 mm. Ovary ca. 2.5 mm, pubescent; styles 2–3 mm; stigmas 1–3, 5–9 mm. Caryopsis ca. 8 mm. New shoots Sep–Oct, fl. Sep–Oct.
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