勒布箭竹 le bu jian zhu

Borinda farcta (T. P. Yi) Stapleton.

Rhizome neck 2.5–6 cm. Culms 2–3.5 m, 0.5–1.5 cm in diam.; internodes terete or slightly flattened, 22–28 cm, initially slightly white powdery, distally white-gray setose, longitudinal ribs greatly prominent, solid; supra-nodal ridges weakly prominent to prominent; sheath scar prominent, with persistent remains of sheath base. Branches (1–)3–10, solid, glabrous. Culm sheaths gradually deciduous, shorter than internodes, leathery, initially setose, longitudinal ribs prominent; auricles small; oral setae 3–5 mm; ligule ca. 1 mm; blade readily deciduous, reflexed. Leaves 2–5 per ultimate branch; sheath slightly white powdery, margins densely gray-brown ciliate; auricles absent; oral setae few, erect, yellow, 1–4 mm; ligule truncate, ca. 1 mm, glabrous; blade narrowly lanceolate, 4–7.5 × 0.5–0.8 cm, abaxially white pubescent, adaxially sparsely white-puberulous, secondary veins 2- or 3-paired, transverse veins distinct, base broadly cuneate, margins serrulate, apex acuminate. Inflorescence unknown.

* About 2300 m. S Xizang.