Culms suberect, 6–7 m, 3–4 cm in diam.; internodes straight, 38–55 cm, sparsely stiffly dull brown hairy, initially partly white powdery below sheath scar but powder not in rings; wall slightly thin; nodes flat, glabrous; branching from 5th or 6th node up. Branches many, clustered, horizontal, central slightly dominant. Culm sheaths deciduous, glossy, abaxially and near margins ± stiffly dull brown hairy, apex subtruncate; auricles subequal, narrowly oblong, ca. 1.5 × 0.6–0.7 cm; oral setae undulate; ligule ca. 1 mm, erose, very shortly ciliolate; blade deciduous, erect, ovate-triangular, nearly as long as or slightly shorter than sheath, base ca. 2/3 width of sheath apex. Leaf blade linear, 9–14 × 0.8–1.2 cm, abaxially subglabrous, adaxially pubescent near base. Pseudospikelets 2 or 3 clustered on each node of flowering branches, linear-lanceolate, 2–3 cm; gemmiferous bracts 2 or 3, ovate, ca. 5 mm, 13-veined, base cordate, apex acute; florets 6 or 7, apical one sterile; rachilla segments flat, 2–4 mm, subglabrous. Glumes absent; lemma oblong, ca. 1.2 cm, slightly asymmetrical, 21-veined, apex acute; palea narrow, longer than or about as long as lemma, keels sparsely ciliolate near apex, 5-veined between and 3-veined on either side of keels; lodicules 3, unequal, anterior 2 oblique, ca. 2 mm, margins long ciliate, posterior narrowly obovate, ca. 1.5 mm. Anthers ca. 5 mm, apex retuse. Ovary subglobose, ca. 1 mm in diam., stalked, apex hispidulous; style hairy, ca. 1.5 mm; stigmas 3, ca. 5 mm. Mature caryopsis unknown. New shoots May–Oct.
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