University of Minnesota. Minnesota Sea Grant.
Montana State University.
The Center for Invasive Species Management closed in 2015. Archives of relevant materials are available here.
Texas A&M AgriLife Extension.
University of Tennessee Extension.
Mississippi State University. Extension Service.
Mississippi State University. Geosystems Research Institute.
University of Texas - Austin. Lady Bird Johnson Wildflower Center.
Provides lists of native plants recommended for various purposes (by State or Canadian Province). Once you have selected a collection, you can browse the collection or search within it using the combination search. Also provides other special collections resources.
West Virginia University Extension Service.
Texas A&M University. Entomology.
Mississippi State University. Center for Resolving Human-Wildlife Conflicts.