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

Rosa palustris.Janet Novak.www.ct-botanical-society.org

Rosa palustris.© 2001 Janet Novak.www.ct-botanical-society.org (Accessed 8/2014).

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

Leaves alternate, pinnate with 7 leaflets, rachis softly hairy, leaf teeth 0.5 mm. 

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-stipule.John-Hilty.Illinois-Wildflowers.illinoiswildflowers.info

Rosa palustris stipule.John Hilty.Illinois Wildflowers.illinoiswildflowers.info (Accessed 2/2017).

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).