Native to the western United States, and just one of several dozen species of wild roses in North America.
A perennial shrub common in moist areas. Reproduction is from seeds, but plants spread by rhizomes as well, forming dense thickets many feet in diameter and over 5 feet in height. Stems are armed with spines that make physical removal that much more difficult.
Numerous branches grow erect to sprawling and intertwining as the plant matures. Leaves are about 5 inches long and are divided into 3 pairs of opposing leaflets and a terminal leaflet. Leaflets are slightly hairy and have serrated margins. At the base of the leaf stalk may be a pair of recurved thorns. Flowers are white to pink and about 1.5 inches in diameter. The petals fall to reveal the large reddish orange seed pod.
Characteristicts Important to Control:
Physical removal will be difficult due to the potential new growth from roots. A systemic herbicide used in summer to fall will be effective.