The Wisconsin Department of Natural Resources (DNR) is calling on gardeners, paddlers and hikers to keep an eye out for and report lesser celandine, an aggressive invasive plant whose showy yellow flowers are visible now.

Lesser celandine (Ranunculus ficaria or Ficaria verna) invades forests, wetlands and shoreland areas, as well as upland areas and disturbed areas such as lawns. It is poisonous to livestock and humans, and infestations of this plant kill off spring wildflowers in woodlands.

Also known as fig buttercup, lesser celadine is a prohibited species under the state's invasive spe...