山楂叶樱桃 shan zha ye ying tao

Prunus crataegifolius Handel-Mazzetti, Anz. Akad. Wiss. Wien, Math.-Naturwiss. Kl. 60: 153. 1923.

Shrubs 1–2 m tall, prostrate to ascending. Bark grayish brown. Branchlets purplish brown, densely villous; young branchlets densely appressed pubescent. Winter buds long ovoid, glabrous, apex acute. Stipules brown, linear, 5–10 mm. Petiole 3–5 mm, pilose; leaf blade elliptic-ovate to elliptic-lanceolate, 1.5–4 × 1–2 cm, abaxially pale green and glabrous or appressed pubescent along midvein when young, adaxially dark green and sparsely pubescent, base cuneate to broadly so, margin acutely incised biserrate and lobed, apex acuminate to acute. Inflorescences 1-flowered or 2-flowered in a fascicle; involucral bracts soon caducous; peduncle absent. Flowers 1.2–1.5 cm in diam., opening at same time as leaves. Pedicel 1.5–2.5 cm, glabrous. Hypanthium tubular, 6–8 × 2–3 mm, outside glabrous. Sepals triangular, 2–3 mm, margin glandular serrate, apex acute to obtuse. Petals pink or white, suborbicular, apex erose. Stamens 27–31. Style exserted, much longer than stamens after anthesis, glabrous. Drupe red, ovoid, 8–10 × 6–8 mm; endocarp sculptured. Fl. Jun–Jul, fr. Aug–Sep.

Alpine forests, thickets on rocky slopes; 3400--4200 m. SE Xizang, NW Yunnan.