Swamp rose. Member of the Rosaceae family. Swamp rose is a shrub that reaches a height of 7 feet, and it grows in swamps and marshes across the central and eastern United States. Its leaves are alternate and pinnately divided into seven toothed leaflets. Flowers are pink in color, 1-2 inches in diameter, and usually solitary. Swamp rose blooms from June-July, and has a pleasant fragrance.