冷箭竹 leng jian zhu

Arundinaria fangiana A. Camus; Bashania faberi (Rendle) T. P. Yi; B. fangiana (A. Camus) P. C. Keng & T. H. Wen; Gelidocalamus fangianus (A. Camus) P. C. Keng & T. H. Wen; Sinarundinaria faberi (Rendle) P. C. Keng; S. fangiana (A. Camus) Keng & P. C. Keng.

Culms (0.5–)1–2.5(–3) m, 3–6 mm in diam.; internodes green, yellow-green when old, often purple spotted, 15–20 cm, initially slightly glaucous, glabrous; wall 1.5–3 mm thick, pith initially lamellate, later powdery; sheath scars flattened or slightly prominent; intranode 2–3 mm. Culm sheaths shorter than internodes, glabrous, margins ciliate; auricles minute or absent; oral setae initially scarce, readily deciduous, purple; ligule truncate, ca. 0.5 mm; blade green or purple-red at apex, glabrous, margins revolute. Leaves 2–4 per ultimate branch; sheath glabrous, ribbed, margins initially ciliate; auricles minute or absent; oral setae scarce, initially purple, later gray-white, 5–7 mm, undulate; ligule truncate, ca. 0.5 mm; pseudopetiole 1–2 mm, glabrous; blade lanceolate, 3–9 × (0.4–)0.8–1.1(–1.4) cm, glabrous, secondary veins 3- or 4(or 5)-paired, base rounded, margin serrulate, scabrous, apex acuminate. Inflorescence racemose to paniculate, 4–6(–13) cm; spikelets 3–12; pedicel 8–22 mm; florets (4 or)5–7, purple-red; rachilla internodes 3–5 mm. Glumes 2; lemma ovate-lanceolate, long mucronate; palea ciliolate, bifid, 1-veined between keels; lodicules ovate, anterior 2 larger. Anthers purple-red. Ovary ellipsoid, glabrous; style 1; stigmas 3. Caryopsis slightly curved, purple-brown or brown, oblong, 6–7 × 1.5–2 mm, style base persistent, beaked, suture shallow, pericarp thin and easy to separate. Fl. May–Aug, fr. Jul–Oct.

* Subalpine coniferous forests, especially Abies; 2300–3500 m. Guizhou (Fangjing Shan), SW Sichuan, Yunnan (Dongchuan, Wumeng Shan).

The culms are used for arrows, penholders, and roofing of temporary shelters. This species is also an important food resource for the giant panda.