绥江玉山竹 sui jiang yu shan zhu

Rhizome neck 20–30 cm. Culms 1–2 m, 3–6 mm in diam.; internodes 14–23 cm, grooved or flattened above branches, white powdery in a ring below each node, initially distally gray-yellow setose, nearly solid; supra-nodal ridge weakly prominent; sheath scar prominent, initially setose. Branches 1 at lower nodes, to 3 or 4 at upper nodes. Culm sheaths persistent, triangularly narrowly rounded, 1/3–1/2 as long as internodes, leathery, adnately gray-brown setose; auricles and oral setae absent; ligule truncate, ca. 0.5 mm; blade reflexed, triangular to linear-lanceolate, margins smooth. Leaves 3–11 per ultimate branch; sheath glabrous; auricles absent; oral setae absent or present; ligule truncate, ca. 1 mm; blade narrowly rounded-lanceolate, 4.5–17 × 1–2.5 cm, abaxially slightly hairy initially, secondary veins 4–8-paired, transverse veins easily seen, base cuneate. Inflorescence unknown. New shoots Aug.

* 1300–1500 m. NE Yunnan.