Rugosa Rose

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{{Taxobox | color = lightgreen | name = Rugosa Rose | status = Conservation status: Secure | image = Rosa rugosa0.jpg | image_width = 240px | image_caption = Rugosa Rose flower | regnum = Plantae | divisio = Magnoliophyta | classis = Magnoliopsida | ordo = Rosales | familia = Rosaceae | subfamilia = Rosoideae | genus = Rosa | species = R. rugosa | binomial = Rosa rugosa | binomial_authority = Thunb. }}

Rugosa rose or Japanese rose (Rosa rugosa) is a rose with short, straight thorns. It is a "suckering" shrub which develops new plants from the roots and forms dense thickets 1—1.50 m tall. 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, 6-9 cm across, with somewhat wrinkled petals; flowering is from summer to autumn (June to September in the northern hemisphere}. The edible hips are large, 2—3 cm diameter, and often shorter than their diameter, not elongated like most other rose hips; in autumn the plants often bear fruit and flowers at the same time. The leaves typically turn bright yellow before falling in autumn.

Image:Rosa rugosa hips.jpg The origin of the species is in eastern Asia and Japan where it was used as an ornamental plant. In the wild, it grows on the coast, often on sand dunes. The Japanese name is Hama-nasu (ハマナス), meaning "shore pear". It has been introduced to numerous areas of the United States, including Nantucket Island. It has many common names, several of which refer to the fruit's resemblance to a tomato, including beach tomato or sea tomato; saltspray rose and beach rose are others.

The sweetly scented flowers are used to make pot-pourri in Japan and China, where it has been cultivated for about a thousand years.

Rugosa rose hybridises readily with many other roses, and is valued by rose breeders for its considerable resistance to the diseases rose rust and rose black spot. It is also extremely tolerant of seaside salt spray and storms, commonly being the first shrub in from the coast. It is widely used in landscaping, being relatively tough and trouble-free. Needing little maintenance, it is suitable for planting in large numbers; its salt-tolerance makes it useful for planting beside roads which need deicing regularly.

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