Culms 7–12 m, 4–8 cm in diam.; internodes 20–45 cm; wall 4–10 mm thick. Branches from ca. 10th node up; dominant branches distinct, 1–2.5 m, 4–12 mm in diam. Culm sheaths initially orange-brown, becoming brown, oblong-triangular, about as long as internodes, thickly papery or leathery, margins ciliate, apex truncate or concave; auricles absent; ligule ca. 1.3 cm, with setae; blade reflexed, narrowly lanceolate. Leaf sheaths initially hispid; ligule 1–1.5 mm; blade lanceolate, 9–33 × 1.5–6 cm. Pseudospikelets 7–20 per node, 8–14 mm; florets 3–5. Glumes 2 or more, 6–8 mm, long mucronate; lemma 7–10 mm, apex mucronate; palea ca. 7 mm. Anthers yellow, 3–5 mm, connectives aristate. Ovary ovoid, style ca. 1 mm; stigmas 1–3, 2–3 mm. Caryopsis yellow, glabrous, apex beaked.
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