薄竹 bao zhu

Leptocanna chinensis (Rendle) L. C. Chia & H. L. Fung.

Culms 5–8 m, 2–3 cm in diam.; internodes straight, 30–45 cm, scabrous, white powdery, initially distally white pubescent, later glabrous. Branching from ca. 3rd node up, nearly horizontal. Culm sheaths initially purple-red, later straw-colored, triangular, usually ca. 1/2 as long as internodes, initially stiffly white hairy, later scabrous and white powdery, apex nearly truncate or concave; auricles very narrowly linear; ligule ca. 1 mm, subentire; blade erect, narrowly triangular, base ca. 1/3 as wide as apex of sheath, margin apically partly involute, apex long acuminate. Leaf sheaths apically purple-red, glabrous; auricles and oral setae absent; ligule subtruncate, ca. 1 mm, subentire; petiole purple-red, ca. 5 mm, glabrous; blade lanceolate to oblong-lanceolate, 15–26 × 3–4.5 cm, abaxially scabrous, adaxially glabrous. Ultimate flowering branches 5–10 cm; sheaths amplexicaul, glabrous, apex attenuate into a slender mucro; pseudospikelets to 1.4 cm, apex acuminate; prophylls linear-lanceolate, 6–8 mm, apex acute or obtuse, keels 2; bracts ovate-lanceolate to linear-lanceolate, 7–11 mm, apex usually mucronate; rachilla not disarticulating. Glumes 2, ovate-lanceolate to broadly lanceolate, 7–9 mm, apex acute or obtuse; fertile lemma ovate-lanceolate, 1–1.1 cm, 15-veined; palea 9–12 mm, 6-veined, apex acuminate with a cluster of short hairs; lodicules 3, 0.5–2 mm, margin ciliate, ventral 2 oblanceolate, apex obtuse, dorsal subovate, apex acute. Anthers 4–9 mm, base unequally bifid. Ovary clavate; stigmas short, plumose. Fruit unknown.

* Evergreen broad-leaved forests; 1500–2000 m. S Yunnan (Jinping, Mengzi, Pingbian).

(=Cephalostachyum chinense (Rendle) D. Z. Li & H. Q. Yang, Ann. Bot. Fennici 44: 156. 2007).