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FOC | Family List | FOC Vol. 9 | Rosaceae | Cotoneaster

46. Cotoneaster uniflorus Bunge in Ledebour, Fl. Altaic. 2: 220. 1830.

单花栒子 dan hua xun zi

Cotoneaster integerrimus Medikus var. uniflorus (Bunge) C. K. Schneider; C. vulgaris Lindley var. uniflorus (Bunge) Regel.

Shrubs deciduous, sometimes prostrate, 30–40(–100) cm tall, spreading. Branchlets grayish brown to grayish black, terete, slender, initially densely yellow pubescent, gradually glabrescent. Petiole (2.5–)3–5 mm, puberulous; stipules purplish red, lanceolate, pilose; leaf blade usually ovate, rarely ovate-elliptic, 1.8–3.5 × 1.3–2.5 cm, abaxially initially tomentose, subglabrous when old, adaxially glabrous, base broadly cuneate to rounded, apex acute, rarely ± obtuse or emarginate. Inflorescences axillary, 1(or 2)-flowered. Pedicel very short, pilose. Flowers 7–8 mm in diam. Hypanthium campanulate, abaxially glabrous. Sepals triangular, longer than or nearly as long as petals, margin sometimes with few shallow teeth, apex ± obtuse or acute. Petals erect, pink, suborbicular, 3–3.5 mm and ca. as broad, base shortly clawed, apex obtuse. Stamens 15–20, shorter than petals. Ovary pubescent apically; styles 2 or 3(or 4), free, not exceeding stamens. Fruit red, globose, 6–7(–10) mm in diam., pyrenes (2 or)3(or 4). Fl. May–Jun, fr. Aug–Sep. 2n = 34.

Forests; 1000--2100 m. Qinghai, Xinjiang [NW Mongolia, Russia].


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