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平枝栒子 Cotoneaster horizontalis

时间:2013-11-06 12:54来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ): 平枝栒子 学名( Scientific Name ): Cotoneaster horizontalis Decne. 英文名( English Common Name ): rockspray cotoneaster 别名( Chinese Common Name ): 平枝灰栒子 异名( Synonym ): Cotoneaster symonsii Lou
中文名(Chinese Name):平枝栒子
学名(Scientific Name):Cotoneaster horizontalis Decne.
英文名(English Common Name):rockspray cotoneaster
别名(Chinese Common Name):平枝灰栒子
异名(Synonym):Cotoneaster symonsii Loudon ex Koehne  Cotoneaster acuminatus var. prostratus Hooker ex Decaisne  Cotoneaster microphylla . Lindl.: Diels  Cotoneaster davidianus hort. ex Dippel
科属(Family & Genus):蔷薇科(Rosaceae)栒子属
形态特征(Description):落叶或半常绿匍匐灌木,高不超过0.5米,枝水平开张成整齐两列状;小枝圆柱形,幼时外被糙伏毛,老时脱落,黑褐色。叶片近圆形或宽椭圆形,稀倒卵形,长5-14毫米,宽4-9毫米,先端多数急尖,基部楔形,全缘,上面无毛,下面有稀疏平贴柔毛;叶柄长1-3毫米,被柔毛;托叶钻形,早落。花1-2朵,近无梗,直径5-7毫米;萼筒钟状,外面有稀疏短柔毛,内面无毛;萼片三角形,先端急尖,外面微具短柔毛,内面边缘有柔毛;花瓣直立,倒卵形,先端圆钝,长约4毫米,宽3毫米,粉红色;雄蕊约12,短于花瓣;花柱常为3,有时为2,离生,短于雄蕊;子房顶端有柔毛。果实近球形,直径4-6毫米,鲜红色,常具3小核,稀2小核。花期5-6月,果期9-10月。
分布(Distribution):产陕西、甘肃、湖北、湖南、四川、贵州、云南。生于海拔2000-3500米灌木丛中或岩石坡上。尼泊尔也有分布。
用途(Use):
引自中国植物志英文版:FOC Vol. 9 Page 105
Cotoneaster horizontalis Decaisne, Fl. Serres Jard. Eur. 22: 168. 1877.
平枝栒子 ping zhi xun zi | Rosaceae  | Cotoneaster
Shrubs deciduous or semievergreen, procumbent, usually to 50 cm tall, sometimes taller, with horizontally spreading, distichously much branched stems. Branchlets blackish brown, terete, initially strigose, glabrous when old. Petiole 1–3 mm, pubescent; stipules caducous, brown, subulate or lanceolate, 2–4 mm, puberulous; leaf blade suborbicular or broadly elliptic, rarely obovate, 6–14 × 4–9 mm, midvein raised abaxially and ± impressed adaxially, abaxially sparsely accumbent pubescent, adaxially glabrous, base cuneate, apex usually acute. Inflorescences 1- or 2-flowered. Pedicel short to nearly absent. Flowers 5–7 mm in diam. Hypanthium campanulate, abaxially sparsely pubescent. Sepals triangular, 1–1.5 × 1–2 mm, apex acute. Petals erect, pink, reddish, or whitish, 3–4 × 2–3 mm, base shortly clawed, apex obtuse. Stamens ca. 12, shorter than petals. Ovary pilose apically; styles (2 or)3, free, not exceeding stamens. Fruit bright red, subglobose or ellipsoid, (3–)5–7 mm in diam., pyrenes 3, rarely 2. Fl. May–Jun, fr. Sep–Oct.
Thickets, rocks, rocky slopes, dry mountain areas; 1500--3500 m. Gansu, Guizhou, Hubei, Hunan, Jiangsu, Shaanxi, Sichuan, Taiwan, Xizang, Yunnan, Zhejiang [Nepal].
Plants with somewhat larger leaves, clearly and very strikingly variegated with white, have been described as Cotoneaster horizontalis var. variegatus Osborn (Gard. Chron., ser. 3, 72: 351. 1922). They are grown as ornamentals, particularly in rock gardens.
 




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