云龙箭竹 yun long jian zhu

Borinda papyrifera (T. P. Yi) Stapleton.

Rhizome neck 5–12 cm, 3–6 cm in diam. Culms 4–6(–8 m), 2–4(–6) cm in diam.; internodes blue-gray, terete, 22–28 cm, densely white powdery, distally gray-brown to yellow-brown setose, longitudinal ribs prominent, nearly solid; nodes initially white powdery, supra-nodal ridges weakly prominent; sheath scar very prominent, initially brown tomentose. Branches 3–7 per node, strong; buds yellow, ovoid, waxy, basally white powdery, marginally densely yellow-brown ciliate. Culm sheaths deciduous, slightly longer than internode, leathery to thickly so, rigid, triangularly narrowly rounded, sparsely yellow-brown setose, longitudinal ribs prominent, margins densely brown setose; auricles absent; oral setae few, erect or slightly curved, brown, 3–6 mm; ligule dark purple, level or convex, 2–3 mm, margins gray-brown ciliate; blade reflexed, linear-lanceolate, glabrous, margins serrulate, apex long acuminate. Leaves 3–5 per ultimate branch; sheath glabrous, longitudinal ribs prominent; auricles absent; oral setae sparse, yellow-brown, ca. 2 mm; ligule truncate or arcuate, glabrous, setulose; blade lanceolate, 10–18 × 1.6–2.3 cm, both surfaces glabrous, secondary veins 5- or 6-paired, transverse veins distinct, base cuneate, margins spinescent-serrulate. Inflorescence unknown. New shoots Aug–Sep.

* 2700–3600 m. W Yunnan.

The shoots are edible, and the culms are used for weaving and making paper and farm tools.