13. Crataegus chungtienensis W. W. Smith, Notes Roy. Bot. Gard. Edinburgh. 10: 26. 1917.
中甸山楂 zhong dian shan zha
Shrubs to 6 m tall. Branchlets grayish brown, terete, glabrous or subglabrous, with sparse, oblong lenticels; buds purplish brown, ovoid, glabrous. Stipules ovate-lanceolate, ca. 8 mm, membranous, glabrous, margin glandular serrate, apex acuminate; petiole 1–1.2, rarely to 3 cm, glabrous; leaf blade broadly ovate, 4–7 × 3.5–5 cm, abaxially sparsely pubescent, densely so along veins, adaxially subglabrous, base rounded to broadly cuneate, margin sharply doubly serrate, with 2 or 3(or 4) pairs of lobes, rarely parted near base, apex obtuse. Corymb 3–4 cm in diam., many flowered; peduncle glabrous or subglabrous; bracts caducous, linear-lanceolate, membranous. Pedicel 4–6 mm, glabrous or subglabrous. Flowers ca. 1 cm in diam. Hypanthium campanulate, abaxially glabrous. Sepals triangular-ovate, ca. 1 mm, both surfaces glabrous. Petals white, broadly obovate, ca. 6 × 5 mm. Stamens 20, slightly longr than petals. Styles (1 or)2 or 3, glabrous. Pome red, ellipsoid, ca. 6 mm in diam., glabrous; sepals persistent, reflexed; pyrenes 1–3, with concave scars on both inner sides. Fl. May, fr. Sep.
Mixed stream side forests, among shrubs; 2500--3500 m. NW Yunnan (Zhongdian Xian).