Culms 2–4(–6) m, 1.5–2.5 cm in diam.; internodes slightly 4-angled or terete, (10–)15–18(–24) cm, glabrous; wall 4–10 mm; nodes with slightly projecting sheath scar. Branches 3 per node, subequal. Culm sheaths deciduous, thickly papery or leathery, margins densely yellow ciliate; auricles absent; ligule truncate; blade readily deciduous, triangular, glabrous. Leaves (1 or)2–5 per branchlet; auricles and oral setae absent; ligule truncate; blade lanceolate, 7–13 × 0.8–1.7 cm, with distinct, transverse veins. Flowering branches leafless or with terminal leaves on branchlets; inflorescence paniculate, 1–4 single pseudospikelet racemes grouped in loose fascicles, subtended by 3 or 4, gradually enlarged bracts. Spikelets 3–6-flowered. Glumes 2(or 3); rachilla disarticulating, internodes 2–5 mm, glabrous; lemma 8–14 mm, papery; palea thinner than lemma, 2-keeled, obtuse; lodicules purple, lanceolate, 1.5–3 mm, upper margin ciliate. Ovary ovoid; style 1; stigmas 2, plumose. Caryopsis nutlike. New shoots Sep; shoots purple.
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A bamboo. It grows 2-4 m tall. The stems are 2-3 cm across. The internodes can be slightly 4 angled. They are 15-18 cm long. There are 2-5 leaves per branch. The leaf blade is 7-13 cm long by 1-2 cm wide. The flowering branches are leafless.
It is a temperate plant. It grows on hilltops between 1,300-1,700 m above sea level in Sichuan in China.
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Broad-leaved forests of the middle mountain range; at elevations from 1,300-1,700 metres.
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