5. Laurocerasus undulata (Buchanan-Hamilton ex D. Don) M. Roemer, Fam. Nat. Syn. Monogr. 3: 92. 1847.
尖叶桂樱 jian ye gui ying
Prunus undulata Buchanan-Hamilton ex D. Don, Prodr. Fl. Nepal. 239. 1825; Cerasus acuminata Wallich; C. undulata (Buchanan-Hamilton ex D. Don) Seringe; C. wallichii (Steudel) M. Roemer; Laurocerasus acuminata (Wallich) M. Roemer; L. undulata (Buchanan-Hamilton ex D. Don) f. elongata (Koehne) T. T. Yü & L. T. Lu; L. undulata f. microbotrys (Koehne) T. T. Yü & L. T. Lu; L. undulata f. pubigera T. T. Yü & L. T. Lu; P. acuminata (Wallich) D. Dietrich; P. acuminata f. elongata Koehne; P. acuminata f. microbotrys (Koehne) Koehne; P. microbotrys Koehne; P. wallichii Steudel; P. wallichii var. crenulata F. P. Metcalf.
Shrubs or trees, 5–16 m tall. Branchlets grayish brown to purplish brown, glabrous, with indistinct small lenticels. Petiole 5–10(–12) mm, glabrous, without nectaries; leaf blade elliptic to oblong-lanceolate, 6–15 × 3–5 cm, herbaceous to thinly leathery, both surfaces glabrous, abaxially usually with a pair of small flat nectaries near base and sometimes additional small nectaries in many rows ± parallel to midvein especially in basal part of leaf, adaxially shiny, base broadly cuneate to subrounded, margin entire or rarely with a few teeth apically from middle, apex acuminate; secondary veins 6–9 on either side of midvein, spreading and arched, abaxially slightly raised. Racemes solitary or 2–4 in a fascicle, 5–10 cm, 10–30-flowered or more; rachis glabrous; bracts 1–2 mm, soon caducous, basal ones sometimes with a tridentate apex. Pedicel 2–5 mm, glabrous. Hypanthium broadly campanulate, outside glabrous. Sepals ovate-triangular, outside glabrous, apex obtuse. Petals yellowish white, elliptic to obovate, 2–4 mm. Stamens 10–30, 3–4 mm. Ovary pubescent. Style shorter than stamens. Drupe purplish black, ovoid-globose to ellipsoid, 1–1.6 × 0.7–1.1 cm, glabrous, apex acute to ± obtuse; endocarp ± thin, ± smooth. Fl. Aug–Oct, fr. winter to spring.
Slopes in broad-leaved evergreen and mixed coniferous forests, stream sides; 500--3600 m. Guangdong, Guangxi, Guizhou, Hunan, Jiangxi, Shaanxi, Sichuan, Xizang, Yunnan [Bangladesh, Bhutan, E India, Indonesia, N Laos, N Myanmar, Nepal, Sikkim, N Thailand, Vietnam].