西藏牡竹 xi zang mu zhu

Sellulocalamus tibeticus (Hsueh & T. P. Yi) W. T. Lin.

Culms 12–25 m, 12–18 cm in diam.; internodes (30–)40–45(–60) cm; wall thick, 6–12 mm. Branching usually from ca. 9th node up, usually with central branch slightly dominant. Culm sheaths initially orange-brown, leathery, abaxially usually with dark brown setae, adaxially glabrous; auricles absent; ligule 2–4 mm; blade erect or slightly reflexed. Leaf sheaths 6–11 mm, glabrous; ligule truncate, 1–1.5 mm; blade broadly lanceolate, 10–32 × 2.2–4.5 cm. Pseudospikelets 2–10 per cluster, 1–1.2 cm, with 3 or 4 florets, basal one sterile; fertile florets 2–3. Glumes 1, ca. 7 × 5 mm, margins ciliate, mucronate; lemma 6–18 mm, margins ciliate, apex obtuse or acute; palea 5–7 mm. Anthers yellow, 5–6 mm. Ovary ovoid; style 5–8 mm; stigmas 1, 2–3 mm. Fruit unknown.

* Broad-leaved forests; 1200–1700 m. Xizang, NW Yunnan.