Rosa palustris - (image 1 of 6)
Taxonomy
Family: Rosaceae
Habitat
Swamps, marshes, bogs and shores.
Associates
Distribution
Nova Scotia west to MN, south to the Gulf of Mexico.
Morphology
Woody perennial to 2 m. Twigs glabrous; infrastipular prickles present at many nodes, stout, decurved, the base broad; internodal prickles few or none. Leaves pinnately compound; leaflets commonly 7, acute, elliptic to lance-ovate, pubescent on the lower midrib, finely serrate (more than 15 fine teeth per side) with teeth averaging 0.5 mm long and less than 2 mm wide; stipules very narrow. Flowers fragrant, solitary or few in small corymbs; petals pink; sepals mostly entire, spreading or reflexed, deciduous; styles distinct; pedicels and hypanthia stipitate-glandular. Fruit a red hip.
Notes
Flowers late June to August.
Wetland indicator: Obligate
Thought to hybridize frequently with R. blanda (early wild rose), a species that begins blooming in May; hybrids have a mostly eglandular hypanthium and pedicel and small internodal prickles, and begin blooming a little later than R. blanda and earlier than R. palustris.
References
Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.
The New York Botanical Garden. Bronx, NY
Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.
USDA, NRCS. 2002. The PLANTS Database, Version 3.5 (http://plants.usda.gov).
National Plant Data Center, Baton Rouge, LA 70874-4490 USA.
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Michael Hough © 2005 |