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Rosa rugosa
''Rosa rugosa'' (rugosa rose, Japanese rose, or Ramanas rose) is a species of rose native to eastern Asia, in northeastern China, Japan, Korea and southeastern Siberia, where it grows on the coast, often on sand dunes.〔(【引用サイトリンク】title=''Flora of China'' )〕 It should not be confused with ''Rosa multiflora'', which is also known as "Japanese rose".
==Description==
''Rosa rugosa'' is a suckering shrub which develops new plants from the roots and forms dense thickets 1–1.50 m tall with stems densely covered in numerous short, straight prickles 3–10 mm long. The leaves are 8–15 cm long, pinnate with 5–9 leaflets, most often 7, each leaflet 3–4 cm long, with a distinctly corrugated (rugose, hence the species' name) surface. The flowers are pleasantly scented, dark pink to white (on ''R. rugosa'' f. ''alba'' (Ware) Rehder), 6–9 cm across, with somewhat wrinkled petals; flowering occurs in spring.〔
The hips are large, 2–3 cm diameter, and often shorter than their diameter, not elongated; in late summer and early autumn the plants often bear fruit and flowers at the same time. The leaves typically turn bright yellow before falling in autumn.
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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