斗竹 dou zhu

Arundinaria spongiosa C. D. Chu & C. S. Chao, J. Nanjing Technol. Coll. Forest Prod. 1981(3): 33. 1981; Acidosasa bilamina W. T. Lin & Z. M. Wu; Pleioblastus altiligulatus var. spongiosus B. M. Yang; Sinobambusa anaurita T. H. Wen.

Culms to 10 m, 4–6 cm in diam.; internodes green, becoming yellow-green, 20–40 cm, weakly grooved above branches, white powdery especially below nodes, glabrous, pith spongy; nodes elevated. Culm sheaths red-brown when fresh, gray-brown when dry, apex triangularly attenuated, strewn with brown strigose hairs or later with striae, base densely setose and hirtellous, margins brown setose; auricles absent; oral setae absent or rarely weakly developed; ligule arcuate, ca. 1 mm, ciliate; blade persistent, erect, narrowly triangular or triangular-lanceolate, faintly crinkled, base nearly as broad or slightly narrower than apex of culm sheath. Leaves 3–5 per ultimate branch; sheath glabrous; auricles and oral setae absent; ligule 2–2.5 mm; blade lanceolate or linear-lanceolate, 9–17 × 1–2 cm, glabrous. New shoots May.

* Broad-leaved forests, forest margins; below 800 m. Guangxi.