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rosa acicularis
''Rosa acicularis'', also known as the prickly wild rose, the prickly rose, the bristly rose and the Arctic rose, is a species of wild rose with a Holarctic distribution in northern regions of Asia,〔(Flora of China: ''Rosa acicularis'' )〕 Europe,〔(Flora Europaea: ''Rosa acicularis'' )〕 and North America.
==Description==
''Rosa acicularis'' is a deciduous shrub growing 1–3 m tall. The leaves are pinnate, 7–14 cm long, with three to seven leaflets. The leaflets are ovate, with serrate (toothed) margins. The flowers are pink (rarely white), 3.5–5 cm diameter; the hips are red, pear-shaped to ovoid, 10–15 mm diameter.
The ploidy of this rose species is variable. Botanical authorities have listed it as tetraploid and hexaploid in North America (subsp. sayi), and octoploid in Eurasia (subsp. acicularis).〔 On the northern Great Plains and
in northwest Canada, extending to Whitehorse, Yukon its populations are generally tetraploid.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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