The article discusses six invasive plants in Wisconsin, including lesser celandine and Japanese stiltgrass, which are being tracked by scientists and land managers for their early spread. While these plants are not officially listed as invasives, they are considered invasions due to their qualities such as spreading easily and displacing native plants. The public can play a crucial role in controlling their spread by reporting them. To remove Siberian squill, people can smother it with cardboard or landscaping fabric and wood chips, dig it up, or use a weed-killer. The remaining species of Japanese stiltsgrass can be removed by hand-digging individual plants or using herbicide treatments. The Bradford pear tree tree, Callery pear, or Callery Pear, is considered an invasive species in Wisconsin for its unpleasant odor.