湖南玉山竹 hu nan yu shan zhu

Rhizome neck ca. 22 cm; internodes solid. Culms to 2.5 m, ca. 6 mm in diam.; internodes terete, 12–22.5 cm, obscurely longitudinally ribbed, glabrous, initially thinly white powdery, especially in ring below nodes; wall 1.2–2 mm thick; supra-nodal ridges level or prominent; sheath scar prominent, glabrous or initially gray-yellow hairy. Branches 3 to many per node. Culm sheaths gradually deciduous, triangularly narrowly rounded, shorter than internode, thinly leathery, prominently longitudinally ribbed, appressed yellow-brown clavate-setose, margins yellow-brown ciliate; auricles absent; oral setae ca. 5, readily deciduous; ligule truncate or convex, ca. 1 mm, margin ciliolate, cilioles readily deciduous; blade erect or decumbent, narrowly lanceolate or linear, glabrous. Leaves 3–5 per ultimate branch; sheath glabrous; auricles absent; oral setae 2–5, yellow, 2–4 mm; ligule arcuate or truncate, glabrous; blade oblong-lanceolate, 9–12 × 1.3–1.6 cm, glabrous, secondary veins 4–6-paired, transverse veins obscure, base cuneate or broadly so, one margin serrulate, other margin smooth. Inflorescence unknown. New shoots May.

* About 1600 m. S Hunan.