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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  Toxicodendron radicans (L.) Kuntze subsp. negundo (Greene) Gillis image
Photographer: Robert W. Freckmann           

Botanical Illustration

Caroline A. Creevey

Emmet J. Judziewicz

Kenneth J. Sytsma

Michael Clayton

Merel R. Black

Christopher Noll

Christopher Noll

Peter A. Black

Paul E. Berry
Family Anacardiaceae
Toxicodendron radicans (L.) Kuntze subsp. negundo (Greene) Gillis
common eastern poison-ivy, poison-ivy
Toxicodendron: means "poison tree"
radicans: with rooting stems
Hazardous hazard symbol- click for definition
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: climbing, perennial, woody vine; stems with centipede-like aerial roots that grasp the host tree
Flower: 5-parted; blooms May-June
Fruit:whitish berry
Leaf:alternate, somewhat shiny, 3-parted, leaflets with large teeth or shallow lobes
Habitat: woods, wood edges, floodplains, openings

More Information Natural Communities Herbarium Specimens
All Toxicodendron list Ethnobotany Information Google- Images or Text
Toxicodendron negundo Greene
Toxicodendron radicans (L.) Kuntze var. negundo (Greene) Reveal

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