Rosa palustris swamp rose Rosaceae ROPA; Bx, pb, vc; Q; R, h;

Rosa palustris (swamp rose) plant.MBGargiullo.Nova Scotia, Canada.8/1/2016

Rosa palustris (swamp rose) plant.MBGargiullo.Nova Scotia, Canada.8/1/2016

Rosa palustris is a very prickly shrub to 2 m tall; colonial from long rhizomes; thorns 0.3-0.6 cm, only at nodes. 

Rosa multiflora.stipule.Copyright David G. Smith. www.discoverlife.org.jpg

Rosa multiflora.stipule.Copyright David G. Smith. www.discoverlife.org.jpg (Accessed 12/2014)

Leaves alternate, pinnate with 7 leaflets, rachis softly hairy, leaf teeth 0.5 mm. Stipules narrow, fused the sides of the leaf stalk.

Rosa palustris (swamp rose). flower, MBGargiullo.Nova Scotia Canada.8/1/2016

Rosa palustris (swamp rose). flower, MBGargiullo.Nova Scotia Canada.8/1/2016

Flowers pink, petals 2-3 cm long, flower base (hypanthium) and calyx covered with stalked glands, appearing coarsely reddish hairy, flowers few, at ends of branches; blooms June. 

Rosa palustris (swamp rose) fruit. Matthew Beziat. Native Fora of the Eastern United States. Jug Bay Welands Sanctuary, MD, 9/2017

Rosa palustris (swamp rose) fruit. Matthew Beziat. Native Fora of the Eastern United States. Jug Bay Welands Sanctuary, MD, 9/2017

Fruit fleshy, red, about 1 cm, eaten by birds that disperse seeds. Also eaten by mammals including bears, raccoons, coyotes, foxes (Wilson 1993). 

Wetland status: OBL. 

Frequency in NYC: Very infrequent 

Origin: Native. 

Habitat: Open swamps. Normally found in freshwater tidal and nontidal marshes, pond edges. Tolerant of flooding or saturated soil up to 75% of growing season. Intolerant of salt, shade (Hightshoe 1988). 

Notes: Twigs, buds and foliage eaten by deer, rabbits. Seeds (achenes) eaten by birds and small mammals (Martin et al 1951).