Learn
about invasive species in Wisconsin.
Subscribe
to the invasive species rules and regulations email list.
Report
an invasive species in your area.
Order
invasive species publications.
Contact information
DNR invasive species staff

Invasive species photo gallery

Diffuse knapweed (Centaurea diffusa)

Click on a photo for an enlarged version or return to all non-native or native invasive plant species.

Photo by  USDA APHIS PPQ Archive. Click for an enlarged version.

Photo by  USDA APHIS PPQ Archive

Photo by Steve Dewey. Click for an enlarged version.

Photo by Steve Dewey

Photo by Sara Rosenthal. Click for an enlarged version.

Photo by Sara Rosenthal

Visit Wisconsin Vascular Plants [exit DNR], a Web site presented by the Wisconsin Herbarium, to view photos and learn more about these plant species, as well as the rest of Wisconsin's Flora.

Last revised: Thursday, October 28, 2021