Chimoncalamus bicorniculatus S. F. Li & Z. P. Wang, Acta Phytotax. Sin. 33: 614. 1995.

Culms 5–8 m, 2–5 cm in diam.; internodes terete, 12–29 cm, initially white powdery, later gray-green, glabrous; nodes prominent, slightly pubescent. Culm sheaths longer than internode, thinly leathery, striate, sparsely, glossy-tawny hairy, distally attenuate and triangular, apex centrally strongly convex or projected, slightly projected on 2 sides, apex 2–4 cm wide; auricles tiny; oral setae several, long; ligule 3–13 mm; blade lanceolate, 4–16 × 1–1.5 cm. Leaves 5 or 6 per ultimate branch; sheaths glabrous; auricles absent or tiny; oral setae 1 or 2; ligule truncate, ca. 1.5 mm; blade linear-lanceolate, 10–13 × 0.8–1.5 cm. Inflorescence and caryopsis unknown. New shoots Jun–Jul.

The culms are used for construction.

* Evergreen broad-leaved forests; 1400–2000 m. S Yunnan (Jinping).