Etymology: Eupatorium: from Greek name Mithridates Eupator, King of Pontus about 115BC who is said to have discovered an antidote to a commonly used poison in one of the species
Plants: erect, perennial, 3'- 6 1/2' tall forb with leafy, hairy stems
Leaves: many, opposite, hairy, 2"-5" long, lance-like, pointed at both ends and usually with a few, small teeth above the middle
Flowers: head with mostly 5 white, disk flowers; inflorescence of many heads in branched, flattish clusters; blooms July-Sept.
Fruits: dry seed on fluffy pappus
Habitat: woods, thickets, savannas, glades
Conservation Status: Native
Flora of North America: Flora of North America Floristic Rating: Coefficient of Conservatism = 4 Atlas of the Wisconsin Prairie and Savanna Flora: by T.S. Cochrane & H.H. Iltis: habitat, distribution infomation / flowering and fruiting times USDA Plants Database: Federal Distribution and detailed information including photos USDA Agricultural Research Service (ARS): Images of seeds, fruits, embryos, etc. Dan Tenaglia's The Missouri Flora: Fabulous photographs; detailed descriptions; color and leave arrangement key. Illinois Wildflowers: Wonderful photographs; detailed descriptions; color and leaf arrangement key Southwest School of Botanical Medicine: Britton & Brown Illustrated Flora - 2nd Edition (1913) "An Illustrated Flora of the Northern United States and Canada"