12. Laurocerasus marginata (Dunn) T. T. Yu & L. T. Lu, Bull. Bot. Res., Harbin. 4(4): 52. 1984.
全缘桂樱 quan yuan gui ying
Prunus marginata Dunn, J. Bot. 45: 402. 1907.
Trees or shrubs, 4–6 m tall. Branchlets grayish brown to blackish brown, densely yellowish brown pubescent when young, glabrescent or hairs persistent, sparsely covered with inconspicuous suborbicular lenticels. Winter buds dark brown, ovoid, 2–4 mm, apex obtuse to acute; scale margins ciliate. Petiole 1–5 mm, glabrous; leaf blade oblong to obovate-oblong, 5–7(–9) × 1.5–3(–4) cm, thickly leathery, both surfaces glabrous, abaxially greenish and with or without 2 basal nectaries, adaxially lustrous green, base narrowly cuneate and asymmetric, margin flat, entire, and hard, apex acuminate and obtusely mucronate; secondary veins indistinct. Racemes axillary, solitary, 2–3(–4) cm, several-flowered; rachis densely pubescent; bracts small, soon caducous. Flowers 2–3 mm in diam. Pedicel 1–3 mm, densely pubescent. Hypanthium campanulate to cup-shaped, ca. 2 mm, outside glabrous or puberulous. Sepals ovate to ovate-lanceolate, slightly shorter than hypanthium, outside glabrous or puberulous, apex obtuse to acute. Petals white, suborbicular to obovate, 2–3 mm. Stamens 25–30, longer than petals. Ovary glabrous. Style nearly as long as stamens. Drupe dark brown blackish brown, ovoid-globose, 10–12 × 7–9 mm, glabrous; endocarp very thin, thinly reticulately rugose when mature. Fl. spring, fr. autumn to winter.
Mountain top forests, thickets, sunny slopes, along trails, ravines; 500--700 m. Guangdong.