Culms 8–12 m, 5–7.5 cm in diam.; internodes 30–40 cm, initially with brown, longitudinally arranged hairs; wall 6–9 mm thick; nodes flat, initially with a ring of yellow tomentum; sheath scars glabrous; branching from base. Branches many, central branches dominant. Culm sheaths deciduous, thickly leathery, dark brown hispid, apex truncate or slightly concave; auricles narrowly oblong, oral setae several; ligule convex, 2–3 mm, fimbriate; blade reflexed, base ca. 1/3 as wide as sheath apex, adaxially strigose. Leaf sheaths glabrous; ligule fimbriate, 2–3 mm; auricles deciduous, small; oral setae straight; blade lanceolate, 9–20 × 1–3 cm. Pseudospikelets 1–2.4 cm; florets 4–7. Glumes 1 or 2, 3.5–5.5 mm; lemma ca. 9 × 5–6 mm; palea about as long as lemma. Anthers ca. 4 mm. Stigmas 3. Caryopsis unknown.
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