purple boneset purp·le·bo·neset uncommon noun 1. North American herb having whorled leaves and terminal clusters of small pinkish or purple flower heads SynonymsJoe-Pye weedpurple bonesettrumpet weedmarsh milkweedEupatorium purpureum Related words Broader terms herb Parts Eupatorium WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
