密毛箭竹 mi mao jian zhu

Rhizome neck 1–2.5 cm. Culms ca. 2 m, to 1 cm in diam.; internodes terete, 16–18 cm, initially densely gray setose, scabrid after setae fall, longitudinal ribs dense and prominent; wall 1–1.5 mm thick; supra-nodal ridges level or weakly prominent; sheath scar prominent, densely gray setose. Branches 2–8 per node. Culm sheaths persistent, narrowly triangular, much shorter than internode, papery, appressed pale yellow setose, longitudinal ribs greatly prominent, margins light yellow ciliate, apex triangular; auricles absent; oral setae absent or scarce; ligule truncate, 0.8–1 mm, sparsely pilose, margins ciliate, cilia deciduous; blade deciduous, reflexed, linear-lanceolate or triangular-conical, slightly pilose. Leaves 2–10 per ultimate branch; sheath gray pubescent, margins gray ciliate; auricles erect, oblong, ca. 1.5 mm; oral setae few, yellow, 2–6 mm; ligule truncate, slightly pilose; blade lanceolate or linear-lanceolate, 5–10 × 0.7–1.4 cm, abaxially white pubescent with hairs 1–2 mm, secondary veins 3–5-paired, transverse veins obscure, base rounded or broadly cuneate, one margin serrulate, other margin nearly smooth. Inflorescence unknown.

* About 1500 m. S Yunnan.