锈色花楸 xiu se hua qiu

Sorbus sikkimensis Wenzig var. ferruginea Wenzig, Linnaea 38: 60. 1874; Aria ferruginea (Wenzig) H. Ohashi & H. Iketani; Micromeles ferruginea (Wenzig) Koehne; Pyrus ferruginea (Wenzig) J. D. Hooker.

Trees or shrubs, 4–10 m tall. Branchlets grayish brown when old, densely rusty tomentose when young, gradually glabrescent, prominently lenticellate when old; buds ovoid, 4–6 mm, apex obtuse; scales several, brown, glabrous. Leaves simple; petiole 1–1.5 cm, initially densely rusty tomentose, glabrous or subglabrous when old; leaf blade ovate, elliptic, or obovate, 5–8(–10) × 3–4.5 cm, lateral veins 6–8(–11) pairs, nearly parallel, terminating in marginal teeth, abaxially prominent, both surfaces initially densely rusty tomentose, glabrescent, abaxially rusty tomentose only along veins when old, base broadly cuneate to rounded, margin minutely serrate, apex shortly acuminate or acute. Compound corymbs terminal, 3–5 × 3–4 cm, few flowered; rachis and pedicels rusty tomentose. Pedicel 3–5 mm. Flowers 7–9 mm in diam. Hypanthium campanulate, abaxially rusty tomentose. Sepals triangular-ovate, apex obtuse. Petals white, broadly oblong or ovate, rarely obovate, 3–4 mm and ca. as broad, adaxially puberulent, base shortly clawed, apex obtuse. Stamens 20, slightly longer than petals. Styles 3 or 4, not exceeding stamens, glabrous, connate basally. Fruit globose, 5–8 mm in diam., smooth or with few minute lenticels, 3- or 4-loculed, with an annular scar. Fl. Apr–Jun, fr. Sep–Oct.

Slope or valley forests, rocky hills, river banks; 2200--2800 m. C and W Yunnan [Bhutan, Sikkim].