花楸树 hua qiu shu

Pyrus pohuashanensis Hance, J. Bot. 13: 132. 1875; Sorbus amurensis Koehne; S. manshuriensis Kitagawa; S. pohuashanensis var. amurensis (Koehne) Y. L. Chou & S. L. Tung; S. pohuashanensis var. manshuriensis (Kitagawa) Y. C. Zhu; S. taishanensis F. Z. Li & X. D. Chen.

Trees to 8 m tall. Branchlets brown or purplish brown to grayish brown, tomentose-villous when young, gradually glabrescent, with small grayish white lenticels; buds oblong-ovoid, 0.8–1.2 cm × 5–7 mm, apex acuminate; scales several, reddish brown, densely gray tomentose-villous. Leaves imparipinnate, together with rachis 10–20 cm; petiole 2.5–5 cm; stipules broadly ovate or semiorbicular, 5–10 × 5–12 mm, margin coarsely sharply serrate; rachis slightly winged, sulcate, tomentose-villous, subglabrous when old; leaflets 5–7-paired, at intervals of 1–2.5 cm, terminal and basal ones usually smaller than others, blade ovate-lanceolate or elliptic-lanceolate, 3–5 × 1.4–1.8 cm, lateral veins 9–16 pairs, slightly arcuate-anastomosing at margin, abaxially pale, tomentose-villous when young, subglabrous or tomentose-villous only along midvein when old, adaxially sparsely tomentose-villous or glabrous, base obliquely rounded, margin minutely sharply serrate, nearly entire basally, apex acute or shortly acuminate. Inflorescences terminal, 8–12 × 10–15 cm, densely flowered; rachis and pedicels tomentose-villous, subglabrous or glabrous when old; bracts ovate, smaller than stipules, sharply serrate, rarely entire. Pedicel 3–4 mm. Flowers 5–8 mm in diam. Hypanthium campanulate, abaxially tomentose-villous or subglabrous. Sepals triangular, 1.5–2.5 × 1–2 mm, glabrous or subglabrous, apex acute. Petals white, broadly ovate or suborbicular, 3.5–5 × 3–4 mm, adaxially puberulous, apex obtuse. Stamens 20, nearly as long as petals. Styles 3(or 4), not exceeding stamens, pubescent basally. Fruit red or orangish red, 6–8 mm in diam., glabrous when mature; sepals persistent. Fl. Jun, fr. Sep–Oct. 2n = 34*.

Mountain slopes, mixed forests in valleys; 900--2500 m. Gansu, Hebei, Heilongjiang, Jilin, Liaoning, Nei Mongol, Shaanxi, Shandong, Shanxi.