Welcome to University of Wisconsin's Weeds Information website. Weeds are defined as undesirable plants or plants that oppose the management objectives of the land. This project conducts research and education activities designed to provide useful information to the public that is specific to weedy plants of the midwest, specifically Wisconsin. Perennial pepperweed (Lepidium latifolium L.) is an invasive creeping herbaceous perennial weed first found in Wisconsin in 2007. This plant is a member of the mustard family and is capable of invading pastures, alfalfa fields, roadsides and many other upland sites, as well as riparian areas, drainage ditches, floodplains, and wetlands. Plants emerge early in the spring, forming a rosette that persists for several weeks. By late spring, plants bolt and produce a flowering shoot. After seed production, flowering shoots die back, although in moist soils new rosettes can emerge in the fall. Select the type of weed you are trying to identify. You may change your choice of weed type, or restart the ID process at any time. BROADLEAF: These herbaceous (non-woody) plants typically produce noticeable flowers. Leaves are often broad with netted veins, but they may also be narrow and veinless. GRASSLIKE: These herbaceous (non-woody) plants lack noticeable flowers. The leaves are ribbon-like with parallel veins, and are often tightly rolled. WOODY: Trees, shrubs, and sub-shrubs with obvious woody stems that persist year after year. ... [Information of the supplier]
