2. Osteomeles schwerinae C. K. Schneider, Ill. Handb. Laubholzk. 1: 763. 1906.
华西小石积 hu xi xiao shi ji
Shrubs or semishrubs, deciduous or evergreen, dense, spreading, 1–4 m tall. Branchlets reddish brown or purple, terete, slender, initially densely grayish white pubescent, glabrescent; buds depressed-triangular-ovoid, small, subglabrous. Leaves with 7–15 pairs of leaflets; stipules caducous, lanceolate, membranous; petiole 3–5 mm, pubescent to subglabrous, petiolules very short or nearly absent; leaflet blade elliptic or elliptic-oblong, rarely obovate-oblong, (3–)5–10 × 2–4 mm, both surfaces sparsely pubescent, abaxially densely so, base broadly cuneate or subrounded, margin entire, apex acute or mucronulate. Corymb 2–3 cm in diam., 3–5-flowered; peduncle grayish white pubescent; bracts caducous, linear-lanceolate, membranous, pubescent. Pedicel 3–5 mm, grayish white pubescent. Flowers ca. 1 cm in diam. Hypanthium campanulate, ca. 3 mm, abaxially subglabrous or sparsely pubescent. Sepals ovate-lanceolate, abaxially pubescent, margin entire, apex acute. Petals oblong, 5–7 × 3–4 mm. Stamens 20. Styles nearly as long as stamens, villous basally. Pome bluish black, ovoid or subglobose, 6–8 mm; fruiting pedicel 5–8 mm, slightly pubescent; sepals persistent, erect. Fl. Apr–May, fr. May–Jul.
Scrub, slopes, fields, roadsides, mixed forests; 1000--3000 m. Gansu, Guizhou, Shaanxi, Sichuan, Taiwan, Xizang, Yunnan.