长鞘玉山竹 chang qiao yu shan zhu

Rhizome neck ca. 30 cm; internodes solid. Culms to 1.5 m, to 1.2 cm in diam.; internodes terete, ca. 13 cm, longitudinally ribbed, flattened above branches, initially with white powdery ring below node, glabrous; wall 1.5–3 mm thick; supra-nodal ridge weakly prominent; sheath scar prominent, with persistent remains of sheath base. Branches 3–7. Culm sheath gradually deciduous, narrowly triangular, longer than internodes, brown setulose, apically more densely so, longitudinal ribs greatly prominent, margins ciliate; auricles absent or small; oral setae initially 3 or 4, 8–10 mm; ligule arcuate, ca. 5 mm, margin glabrous; blade linear-lanceolate, glabrous, revolute. Leaves 5 or 6 per ultimate branch; sheath glabrous; auricles absent, oral setae 1–4, erect, yellow-brown, 2–5 mm; ligule truncate, ca. 0.5 mm, glabrous; blade linear-lanceolate, 4–9 × 0.5–0.9 cm, glabrous, secondary veins 3- or 4-paired, transverse veins not distinct, base cuneate, one margin serrulate, other obscurely so, apex acuminate. Inflorescence unknown.

* About 2100 m. N Fujian.