Eupatorium altissimum L.  
Family: Asteraceae
tall boneset, tall eupatorium, tall thoroughwort, upland boneset
[Eupatorium saltuense Fernald]
Eupatorium altissimum image
John M. Schoeneker  
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 leaf drawing
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
Eupatorium altissimum image
Richard Bauer  
Eupatorium altissimum image
Emmet J. Judziewicz  
Eupatorium altissimum image
Christopher Noll  
Eupatorium altissimum image
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