(from the article `boneset`) ...constituting the genus Eupatorium of the composite family Asteraceae, native primarily to tropical America. The North American plant known as ... ...are shrubby or treelike. Members of the genus typically bear large, showy clusters of purplish, pink, blue, or white flowers. Some species are ... [2 rela... Found on http://www.britannica.com/eb/a-z/a/30