Robert W. Freckmann Herbarium


Because of technology changes and personnel changes at UWSP and the Wisconsin State Herbarium, the database of plant species housed at this site was merged with the database from the OLD WisFlora website to create a new Flora of Wisconsin website at Currently we are encouraging all Wisplant viewers to begin using the Flora of Wisconsin website as soon as possible. Wisplants will remain operational through July 13th. After that date, all traffic to Wisplants will be redirected to the Flora of Wisconsin website.

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  Eupatorium perfoliatum L. var. perfoliatum image
Photographer: Derek Anderson           

Asa Thoresen

Clifford Orsted

Clifford Orsted

Hugh H. Iltis

Merel R. Black

Marion Sheehan

Christopher Noll

Rob Baller
Family Asteraceae
Eupatorium perfoliatum L. var. perfoliatum
boneset, common boneset, thoroughwort
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
perfoliatum: Latin for "through the leaf"
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: erect, perennial, 3'-4' tall forb; stems with long spreading hairs
Flower: head with 9-23 white disk flowers; inflorescence 6" flat to roundish, branched clusters; blooms July-Oct.
Fruit:dry seed on fluffy pappus
Leaf:opposite, sharply toothed, pointed tip and a wide base surrounding the stem leaf drawing
Habitat: full sun; wet to moderate moisture; meadows, prairies, shores; in sandy, loamy soil

More Information Natural Communities Herbarium Specimens
All Eupatorium list Ethnobotany Information Google- Images or Text

Flora of North America (off site)
Eupatorium perfoliatum L. f. perfoliatum
Eupatorium perfoliatum L. f. purpureum Britton
Eupatorium perfoliatum L. f. trifolium Fassett
Eupatorium perfoliatum L. f. truncatum (Muhl. ex Willd.) Fassett

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