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

34. Cotoneaster acutifolius Turczaninow, Bull. Soc. Imp. Naturalistes Moscou. 5: 190. 1832.

灰栒子 hui xun zi

Shrubs deciduous, 2–4 m tall. Branchlets brownish or reddish brown, terete, slender, initially villous, glabrescent. Petiole 2–5(–10) mm, villous; stipules caducous, brown, linear-lanceolate, 3–5 mm, slightly villous; leaf blade elliptic-ovate to oblong-ovate, 2–4(–5) × 1–2(–3) cm, veins raised abaxially and impressed adaxially, adaxially glabrous or both surfaces initially villous, gradually glabrescent, subglabrous when old, base broadly cuneate, apex acute, rarely acuminate. Corymbs 2–4 cm, 2–5-flowered; rachis and pedicels villous; bracts linear-lanceolate, 3–5 mm, slightly pilose. Pedicel 3–5 mm. Flowers 7–8 mm in diam. Hypanthium campanulate or shortly cylindric, abaxially glabrous or villous. Sepals triangular, 1–2 × 1.5–2 mm, apex acute or ± obtuse. Petals erect, white, tinged reddish, broadly obovate or oblong, 3.5–4.5 × 3–4 mm, glabrous, base somewhat long clawed, apex obtuse. Stamens 10–15, shorter than petals. Ovary densely villous apically; styles often 2, free, not exceeding stamens. Fruit black, ellipsoid, obovoid, or subglobose, 6–8(–10) mm in diam., villous, pyrenes 2 or 3. Fl. May–Jun, fr. Aug–Sep.

Slopes, foothills, gullies, forests, forest margins, thickets, mountain valleys, exposed grasslands; 1000--3700 m. Anhui, Gansu, Hebei, Henan, Hubei, Nei Mongol, Qinghai, Shaanxi, Shanxi, Sichuan, Taiwan, Xizang, Yunnan [Mongolia, Russia].

1 Hypanthium abaxially glabrous or only slightly villous.   (2)
+ Hypanthium abaxially villous; leaf blade villous on both surfaces.   (3)
2 (1) Leaf blade adaxially glabrous, abaxially villous; hypanthium abaxially glabrous or slightly villous.   34c var. lucidus
+ Leaf blade villous on both surfaces; hypanthium abaxially glabrous.   34d var. glabricalyx
3 (1) Abaxial surfaces of both leaf blade and hypanthium sparsely villous.   34a var. acutifolius
+ Abaxial surfaces of both leaf blade and hypanthium densely villous.   34b var. villosulus

Lower Taxa


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