Invasive Plants Association of Wisconsin (IPAW).
One of the basic principles of invasive plant management is early detection. To that end, IPAW is sponsoring a reward program to encourage and provide incentive for citizens of the state to look for and report prohibited invasive plants.
Virginia Department of Conservation and Recreation. Natural Heritage Program.
Portland State University (Oregon).
University of New Hampshire. Cooperative Extension.
Oregon Public Broadcasting.
Benton Soil and Water Conservation District (Oregon).
Virginia Tech; Virginia State University. Virginia Cooperative Extension.