Another plant suited for wet spaces, Eupatorium perfoliatum is commonly found along streams and at the edge of woods. A clump-forming plant that has clusters of small, fluffy white flowers. Needs plenty of moisture in full sun to part shade.
This plant was frequently used as a medicine by the Native Americans. Later, it was introduced to American Settlers and was used for medicine for flus, fevers, colds, and other ailments.
For more information on this plant, visit the USDA PLANTS Database: http://plants.usda.gov/java/profile?symbol=eupe3