方脉箬竹 fang mai ruo zhu

Culms ca. 3 m, 0.8–1.1 cm in diam.; internodes 22–26 cm, initially apically densely brown strigose and setulose; nodes weakly prominent; intranode 5–8 mm. Culm sheaths green, tinged with purple when fresh, becoming straw-colored, unmarked, shorter than internode on lower culm, densely brown-purple strigose, margins densely brown ciliate; auricles brown, falcate, large, ca. 15 × 1.3–3 mm; oral setae radiate, flexuose, brown, to 2 cm; ligule purple-brown, truncate to slightly arcuate, 2–2.5 mm, ciliate with hairs 1.2–1.6 cm or longer; blade erect or reflexed, green, narrowly triangular. Leaves 6 or 7 per ultimate branch; sheath initially brown strigose, glabrescent, margins long brown ciliate; auricles purple-brown, falcate, ca. 12 × 2 mm; oral setae radiate, brown, ca. 1.4 cm; ligule purple-brown, fimbriate; blade ovate-lanceolate or oblong-lanceolate, 8.5–24.5 × 5.6–7.2 cm, abaxially glaucous, secondary veins 10–13 pairs, tessellations square, base rounded or rarely cuneate, apex acuminate. Inflorescence unknown. New shoots May.

* Valley forests; 600–900 m. Guizhou, Hunan; cultivated in Zhejiang.