Culms 5–12 m, (3–)6–8 cm in diam.; internodes green or yellow with green stripes, 30–45 cm; wall 5–5.6 mm thick. Branches several. Culm sheaths deciduous, initially grass-green, leathery, initially appressed brownish hispid, becoming glabrous; auricles small; ligule 3–8 mm, fimbriate; blade reflexed, ovate-lanceolate or lanceolate, abaxially glabrous. Leaf sheaths initially slightly hairy, becoming glabrous; ligule ca. 1 mm, serrulate; blade oblong-lanceolate, 10–25 × 1.5–3 cm, base rounded, apex acute. Pseudospikelets 5–10 per node. Spikelets ca. 1.2 cm; florets 4 or 5. Glumes usually 2(or 3), ca. 6 mm, margins ciliate; lemma 9–11 mm, glabrous, margins ciliate, apex acute, mucronate; palea 6–8 mm, 2-keeled, 3-veined between keels, apex acuminate or bifid. Anthers yellow, 5–6 mm, apex mucronate. Ovary ovoid; style slender; stigma 1. Caryopsis ca. 5 mm.
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A bamboo. It grows 5-12 m tall. The culms are 6-8 cm wide. The internodes are green or yellow with green stripes. They are 30-45 cm long. The leaves are 10-25 cm long by 2-3 cm wide.
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