Seaside rose USDA PLANTS Symbol: RORU
U.S. Nativity: Exotic
Habit: Shrub or Subshrub
Rosa rugosa Thunb.

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Taxonomic Rank: Magnoliopsida: Rosales: Rosaceae
Native Range: China, Korea, Japan (REHD);

Appearance
Rosa rugosa is a deciduous, multi-stemmed shrub. Stems are erect to arching, to 5 ft (1.5 m), often much branched, tomentose when young and densely prickly. Prickles from large to small are slender and straight. Larger prickles near the base may be tomentose and are usually glabrous at the point. It sends out woody rhizomes which can expand or create infestations.
Foliage
Leaves are alternate with 5–9 leaflets about 0.8-2 in (2–5 cm) long by 0.6-1.2 in (1.5–3 cm) wide. Leaflets are widely elliptical, acute, with broadly cuneate or rounded base. Leaf tops are leathery, dark green, conspicuously bullate or rugose, and rather shiny. Back of leaves are green-grey, hairy with netlike veins. Leaf margin bluntly and simply crenate-serrate, involute, edge of teeth often deflexed. Petiole and rachis are hairy, with many prickles. Stipules are pale green, hairy, 1 x 0.4-0.6 in (2.5 × 1–1.5 cm), divergent, the free part broadly ovate or deltoid.
Flowers
Flowers usually solitary or few together, 2.4-3.5 in (6–9 cm) across and fragrant. The five petals vary in color from bright purplish-pink to white. There are 200–250 stamens per flower, and usually more than a hundred styles.
Fruit
Fruit is a hip as in other roses. Hips begin dull green to orange ripening to glossy and brilliant red.
Ecological Threat
R. rugosa can tolerate some salinity and has become an invasive problem in many coastal regions, where it can form monotypic stands. It can change A native of temperate and coastal areas of East Asia, it was has been introduced around the world for ornamental purposes. It is now found in natural areas in Australia, New Zealand, Europe and North America.

Identification, Biology, Control and Management Resources

Selected Images from Invasive.orgView All Images at Invasive.org


Feature(s); Hips
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
Additional Resolutions & Image Usage

Flower(s); white flower
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
Additional Resolutions & Image Usage

Cultivar; 'Rubra'
Dow Gardens , Dow Gardens, Bugwood.org
Additional Resolutions & Image Usage

Flower(s);
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
Additional Resolutions & Image Usage

Feature(s); Hip
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
Additional Resolutions & Image Usage

EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org
 


State(s) Where Reported invasive.
Based on state level agency and organization lists of invasive plants from WeedUS database.


Invasive Listing Sources:
Connecticut Invasive Plant Working Group
Faith Campbell, 1998
John Randall, The Nature Conservancy, Survey of TNC Preserves, 1995.
Mid-Atlantic Exotic Pest Plant Council, 2005
New Jersey Department of Agriculture, Division of Plant Industry, 2004
Pennypack Ecological Restoration Trust, Pennsylvania.
Reichard, Sarah. 1994.  Assessing the potential of invasiveness in woody plants introduced in North America. University of Washington Ph.D. dissertation.
Rhode Island Natural History Society,