This list of invasive plant species in Wisconsin includes non-native plant species or strains "that become established in natural plant communities and wild areas, replacing native vegetation".
[1] The Invasive Plants Association of Wisconsin (IPAW) is a group working to address the problems presented by invasive species in Wisconsin.
[1] In Wisconsin it is illegal to "possess, transport, transfer, or introduce certain invasive species in Wisconsin without a permit".
[2] Species on IPAW's list of invasive plants:[3]