玉山竹 yu shan zhu

Arundinaria niitakayamensis Hayata, Bot. Mag. (Tokyo) 21: 49. 1907; A. oiwakensis Hayata; Indocalamus niitakaya-mensis (Hayata) Nakai; I. oiwakensis (Hayata) Nakai; Pleio-blastus niitakayamensis (Hayata) Ohki; P. oiwakensis (Hayata) Ohki; Pseudosasa oiwakensis (Hayata) Makino; Sasa niitaka-yamensis (Hayata) E. G. Camus; S. niitakayamensis var. microcarpa E. G. Camus; Sinarundinaria niitakayamensis (Hayata) P. C. Keng.

Rhizome neck ca. 30 cm. Culms 1–4 m, 5–20 mm in diam.; internodes 10–30 cm, grooved or flattened above branches, initially setulose, becoming glabrous and waxy; supra-nodal ridge level; sheath scar with persistent remains of sheath base. Branches 1 at lower nodes, 3 or 4 at upper nodes. Culm sheaths gradually deciduous or persistent, light brown, leathery, densely setose; auricles small; oral setae brown, ca. 2 mm; ligule truncate, ca. 0.5 mm, margin fissured; blade deciduous, linear, glabrous. Leaves 3–10 per ultimate branch; sheath sparsely hairy on margins and apex; auricles small; oral setae several, 2–3 mm; ligule truncate, ca. 1 mm, margin fissured, ciliate; blade lanceolate, 2–18 × 0.3–1.3 cm, glabrous, secondary veins 2–4-paired, transverse veins distinct, base rounded, one margin serrulate, other margin obscurely so. Inflorescence paniculate; spikelet 2–4 cm; florets 2–7, purple-brown; rachilla internodes ca. 5 mm, hairy. Lemma lanceolate, margins ciliate at apex; palea keels ciliate, apex bifid. Anthers yellow-green. Ovary fusiform, glabrous. Caryopsis olivaceous.

* 1000–3000 m. Taiwan.