耐寒栒子 nai han xun zi

Cotoneaster himalaiensis Hortorum ex Zabel.

Shrubs or small trees, deciduous, to 10 m tall, with spreading branches. Branchlets purplish brown or grayish brown, angulate, initially tomentose, glabrescent. Petiole 4–7 mm, tomentose; stipules brown, linear-lanceolate, 4–6 mm, tomentulose; leaf blade narrowly elliptic to ovate-lanceolate, 3.5–8(–12) × 1.5–3(–4.5) cm, veins raised abaxially and slightly impressed adaxially, abaxially initially tomentose, gradually glabrescent, subglabrous when old, adaxially usually glabrous, base cuneate to broadly cuneate, apex acute or obtuse, sometimes mucronate with spiniform point. Compound corymbs dense, 4–6 × 3–5 cm, ca. 20–40-flowered; rachis and pedicels densely tomentose; bracts linear-lanceolate, 3–5 mm, tomentose. Pedicel 2–4 mm. Flowers 6–7 mm in diam. Hypanthium campanulate or shortly subcylindric, abaxially densely tomentose. Sepals triangular, 1–1.5 × 1.5–2 mm, apex obtuse. Petals spreading, white, broadly ovate or suborbicular, 3–3.5 mm and nearly as broad, glabrous or puberulous adaxially near base, base shortly and broadly clawed, apex obtuse, rarely somewhat emarginate. Stamens 18–20, slightly shorter than petals. Ovary densely tomentose apically; styles 2, free, not exceeding stamens. Fruit bright red, ellipsoid, 4–5 mm in diam., pyrenes 2. Fl. Mar–May, fr. Sep–Oct. 2n = 34.

River valleys, broad-leaved deciduous forests on slopes; 2800--3300 m. Xizang [Bhutan, N India, Nepal, Sikkim].