毛玉山竹 mao yu shan zhu

Indocalamus basihirsutus McClure, Sunyatsenia 6: 35. 1941; Sinarundinaria basihirsuta (McClure) C. D. Chu & C. S. Chao; S. papillosa W. T. Lin; Yushania actinoseta W. T. Lin & Z. M. Wu; Y. longipilosa T. H. Wen & S. C. Chen; Y. papillosa (W. T. Lin) W. T. Lin.

Rhizome neck ca. 50 cm. Culms 1.5–3 m, 3–8 mm in diam.; internodes terete, 10–29 cm, white powdery below nodes, initially light yellow setose; wall 1.5–3 mm thick; supra-nodal ridges level; sheath scar prominent, initially densely yellow-brown retrorse-setose, with persistent remains of sheath base. Branches 1 per node at lower nodes and 3 at upper nodes. Culm sheaths persistent, narrowly triangularly rounded, 2/5–2/3 as long as internodes, leathery, densely yellow-brown clavate-setose, margins densely yellow-brown setose; auricles purple, falcate; oral setae many, radiating, yellow-brown, 4–10 mm; ligule truncate or arcuate, ca. 1 mm, initially densely brown ciliate; blade reflexed, linear-lanceolate, margins serrulate. Leaves 5–9 per ultimate branch; sheath retrorsely white setose, margins densely white ciliate; auricles purple, falcate; oral setae many, radiating, yellow-brown, 4–15 mm; ligule truncate, margins ciliate; blade lanceolate, 7–18.5 × 0.7–1.8 cm, abaxially initially gray setose, secondary veins 4–6-paired, transverse veins distinct, base cuneate, one margin serrulate, other margin obscurely so. Inflorescence paniculate; spikelets 12–17, dark purple; rachilla internodes ca. 5 mm, margins gray ciliate, apex swollen. Lemma glabrous, apex acuminate; palea glabrous, apex bifid. Other parts unknown. New shoots Apr.

* 1500–1600 m. N Guangdong, S Hunan.