矩叶赤竹 ju ye chi zhu

Culms 1–1.5 m, 2–4 mm in diam.; internodes initially yellow-green, later straw-colored, ca. 8 cm, initially ± white powdery below nodes; nodal ridge weakly elevated. Culm sheaths purple-green, about as long as internodes, glabrous or puberulent at base, margins ciliate; auricles ascending, purple-green, falcate, puberulent; oral setae developed, or on lower culm sheaths; auricles and oral setae absent or weakly developed; ligule ca. 1 mm, margins ciliolate; blade erect, dark purple, lanceolate. Leaves 3–5 per ultimate branch; sheath glabrous or initially sparsely appressed hirsute on upper sides, margins ciliate; auricles small; oral setae well developed; blade oblong-lanceolate, 7–9 × 1.7–2.6 cm, glabrous, secondary veins ca. 6 pairs, transverse veins distinct, base rounded or broadly cuneate, apex abruptly acute or awnlike. Inflorescence unknown. New shoots Mar–Apr.

* Cultivated. Guangdong (Guangzhou).