武夷山苦竹 wu yi shan ku zhu

Culms to 5 m, to 3.5 cm in diam.; internodes cylindrical, to 33 cm, initially densely pruinose, dark powdery when old; wall ca. 7 mm thick; supra-nodal ridge about as high as sheath scar or lower; intranode 5–6 mm. Branches 3–7, erect, subequal, appressed to culm. Culm sheaths yellow-green, about as long as internodes or slightly shorter, leathery, persistently pruinose, nearly glabrous or with weak deciduous purple setae, slightly gray pubescent at base, margins with or without sparse cilia; auricles subcircular or falcate, small; oral setae to ca. 3.5 mm; ligule purple, truncate, ca. 1 mm; blade deflexed or reflexed, lanceolate, 2.5–6 cm, shortly ciliate at base. Leaves 3 or 4 per ultimate branch; sheath glabrous, slightly pruinose; auricles present; oral setae absent; ligule truncate, ca. 1.5 mm; blade lanceolate, 8–14 × 1.5–2.2 cm, secondary veins 5- or 6-paired, one margin serrate, other margin nearly entire. Inflorescence unknown.

* Mountain slopes; ca. 200 m. Fujian.