Culms 8–15 m, 7–10 cm in diam.; internodes 34–42 cm, initially thinly white powdery, becoming glossy; wall thick to thin. Branches from culm base, 3 to several, subequal, main mid-culm ones 3, central not dominant. Culm sheaths deciduous, initially orange-green, elliptical to oblong, usually longer than internodes, papery, margins ciliate; auricles small; oral setae short; ligule 8–10 mm, serrulate; blade reflexed, linear-lanceolate, 30–40 × 2–3 cm. Leaf sheaths initially sparsely hairy, becoming glabrous; ligule short, serrulate; blade lanceolate, 12.5–25 × 1.2–2 cm. Pseudospikelet clusters dense, 2.5–5 cm in diam., prophylls broad, 2-keeled. Spikelets 8–15 mm, glabrous; fertile florets 2–5. Glumes 2 or more, 8–9 mm, long mucronate; lemma 9–10 mm, apex long mucronate; palea 7–8 mm. Anthers yellow or purple, 4–5 mm, apex apiculate. Ovary turbinate; style 5–6 mm; stigma purple. Caryopsis 6–8 mm.
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A bamboo which forms an open clump. The culm or stem is very straight. It grows 20-24 m high. It is 6-10 cm across. It has a white powdery covering over it when young. It turns green on maturity. The internodes are 22-38 cm long. The lower node has aerial roots. There are branches from the nodes. The culm sheath is 30-50 cm long by 12-20 cm wide. The leaf blade is sword shaped and 12-25 cm long by 1.5-2.5 cm wide. It is thin and pale. It tapers to the tip. The flowering stalks are on leafless branches.
A tropical plant. It grows in tropical mixed deciduous and monsoon forest. It grows below 1,000 m altitude. The minimum temperature is 14.5°C and average maximum is 33.3°C. The average rainfall is 950 mm. In Yunnan.
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An undergrowth plant in dry/moist tropical and subtropical broadleaf forests, montane rain forest and semi-evergreen rain forest at elevations up to 3,000 metres.
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