泸水箭竹 lu shui jian zhu

Borinda lushuiensis (Hsueh & T. P. Yi) Stapleton.

Culms 3–5 m, 0.8–1 cm in diam.; internodes terete but grooved above branches, 14–32 cm, initially white powdery, glabrous; wall 1.5–3.2 mm thick; supra-nodal ridges prominent to very prominent; sheath scar prominent. Branches 2–9 per node. Culm sheaths deciduous, narrowly triangular, shorter than internodes, leathery, glabrous or sparsely setose, margins glabrous, apex narrowly triangular; auricles and oral setae absent; ligule purple, truncate, ca. 1 mm, glabrous; blade erect or reflexed, triangular or linear-triangular, glabrous, adaxially scabrous, margins rolled. Leaves 3–5 per ultimate branch; sheath glabrous; auricles and oral setae absent; ligule purple, truncate, glabrous; blade narrowly lanceolate, 7–11 × 0.6–1 cm, glabrous, secondary veins 3- or 4-paired, transverse veins distinct, base cuneate, margin nearly smooth or slightly scabrous, apex long acuminate. Inflorescence unknown.

* 1700–1800 m. NW Yunnan.

This species is a source of food for the giant panda.