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维西蔷薇Rosa weisiensis Yü et Ku

维西蔷薇Rosa weisiensis Yü et Ku

别名:

科名:蔷薇科 Rosaceae

属名:蔷薇属 Rosa

《中国植物志》第37卷445页
  75.维西蔷薇
  Rosa weisiensis Yu et Ku in Bull. Bot. Res. 1 (4): 16. 1981.
  攀援小灌木;小枝圆柱形,紫褐色,无毛;当年生小枝有腺毛和稀疏柔毛;皮刺短、扁、散生。小叶3-5,连叶柄长4-5.5厘米;小叶片卵形,椭圆形稀长圆形,长1.2-2.5厘米,宽4-14毫米,先端急尖或短渐尖,基部近圆形,上面深绿色,无毛,下面颜色较浅,有腺毛和稀疏柔毛,边缘有重锯齿,幼时齿尖常带腺体;小叶柄和叶轴有散生腺毛和柔毛;托叶膜质,大部贴生于叶柄,离生部分披针形,边缘和下面有腺。花5-10朵,成伞房状排列,花梗长8-12毫米,密被腺毛和散生柔毛;花直径约1.5厘米;萼片披针形,全缘,先端长渐尖,花后反折,萼筒和萼片外面被腺毛和稀疏柔毛,内面密被柔毛;花瓣白色,有香味,宽倒卵形,先端微凹,基部楔形,约与萼片等长;雄蕊多数;花柱结合成柱,伸出,比雄蕊长约1倍,密被柔毛。果未见。
  产云南。多生灌丛中,海拔1850-2300米。
  本种与悬钩子蔷薇R. rubus Levl. et Vant.近似,惟小叶和花朵均较小,叶片边缘有重锯齿,叶片一下面被腺体,易于区别。
形态特征:攀援小灌木;小枝圆柱形;紫褐色,无毛;当年生小枝有腺毛和稀疏柔毛;皮刺短、扁、散生。小叶3—5,连叶柄长4--5.5厘米;小叶片卵形,椭圆形稀长圆形,长1.2—2.5厘米,宽4—14毫米,先端急尖或短渐尖,基部近圆形;上面深绿色,无毛,下面颜色较浅,有腺毛和稀疏柔毛,边缘有重锯齿,幼时齿尖常带腺体;小叶柄和叶轴有散生腺毛和柔毛;托叶膜质,大部贴生于叶柄,离生部分披针形,边缘和下面有腺。花5—10朵,成伞房状排列,花.梗长8—12毫米,密被腺毛和散生柔毛;花直径约1.5厘米;萼片披针形,全缘,先端长渐尖,花后反折,萼筒和萼片外面被腺毛和稀疏柔毛,内面密被柔毛;花瓣白色,有香味,宽倒卵形,先端微凹,基部楔形,约与萼片等长;雄蕊多数;花柱结合成柱,伸出,比雄蕊长约1倍,密被柔毛。果未见。
产地分布:产云南。多生灌丛中,海拔1850—2300米。
本种提示:本种与悬钩子蔷薇R.rubus Levl.Et Vant.近似,惟小叶和花朵均较小,叶片边缘有重锯齿,叶片下面被腺体,易于区别。
参考文献:Rosa weisiensis Yu et Ku in Bull.Bot;Res.1(4):16,1981.

《Flora of China》 Vol. 9 (2003)
Rosa weisiensis  T. T. Yu & T. C. Ku
维西蔷薇   wei xi qiang wei
Shrub climbing, small. Branchlets purple-brown, terete, glabrous, those of present year glandular-pubescent and sparsely pubescent; prickles scattered, short, flat. Leaves including petiole 4–4.5 cm; stipules membranous, mostly adnate to petiole, free parts lanceolate, abaxially and margin glandular, apex acuminate; rachis and petiole sparsely glandular-pubescent and pubescent; leaflets 3–5, deep green adaxially, ovate or elliptic, rarely oblong, 1.2–2.5 × 0.4–1.4 cm, abaxially glandular-pubescent and sparsely pubescent, glabrous, base subrounded, margin doubly serrate, teeth often glandular apically when young, apex acute or shortly acuminate. Flowers 5–10 in corymb, ca. 1.5 cm in diam.; pedicel 8–12 mm, densely glandular-pubescent, sparsely pubescent; bracts caducous, unknown. Hypanthium oblong or ovate-oblong, abaxially glandular-pubescent and sparsely pubescent. Sepals 5, lanceolate, abaxially glandular-pubescent and sparsely pubescent, adaxially densely pubescent, margin entire, apex long acuminate. Petals 5, fragrant, white, broadly obovate, base cuneate, apex emarginate. Styles connate into column, nearly equaling stamens, exserted, densely pubescent. Hip unknown. Fl. May–Jul, fr. Aug–Oct.
Scrub; 1800--2300 m. NW Yunnan (Weixi Xian).
One of us (Robertson) has seen no specimens of this species.

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