Culms 10–12 m, to 10 cm in diam.; internodes 39–47 cm; wall to 2 cm thick. Branches several, dominant branch well developed. Culm sheaths deciduous, initially yellow-green, leathery or thickly leathery, glabrous; auricles absent; ligule ca. 3 mm, serrulate; blade erect, 6–12 cm. Leaf sheaths brown hairy; ligule 3–5 mm, serrulate; blade to 40 × 12 cm. Pseudospikelets 1 or more per node. Spikelets 17–24 × 5–10 mm; florets 5–8. Glumes 2 or 3, apex mucronate; lemma 7.5–12.5 mm, leathery, apex mucronate; palea about as long as lemma or slightly longer, 4-or 5-veined between keels, apex bifid. Filaments 7–11 mm; anthers yellow, 6–7 mm. Pistil 1.2–1.7 cm; stigma 1. Fruit unknown.
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