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''Rosa sericea'' is a species of ''Rosa'' native to southwestern China (Guizhou, Sichuan, Xizang, Yunnan), Bhutan, northern India (Sikkim), Nepal and Myanmar; it grows in mountains at altitudes of 2,000-4,400 m. It is a shrub growing to 2 m tall, often very spiny. The leaves are deciduous, 4–8 cm long, with 7-11 leaflets with a serrated margin. The flowers are 2.5–5 cm diameter, white, with (unusually for a rose) only four petals. The hips are red, 8–15 mm diameter, with persistent sepals, and often bristly. There are four formae: *''Rosa sericea'' f. ''sericea''. *''Rosa sericea'' f. ''glandulosa'' T.T.Yü & T.C.Ku. *''Rosa sericea'' f. ''glabrescens'' Franchet. *''Rosa sericea'' f. ''pteracantha'' Franchet. The closely related ''Rosa omeiensis'' is sometimes treated as a subspecies of ''R. sericea''. ==Cultivation and uses== ''R. sericea'' f. ''pteracantha'' is grown as an ornamental plant for its large, bright red thorns. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rosa sericea」の詳細全文を読む スポンサード リンク
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