Louisiana State University Agricultural Center. Research and Extension.
Universidad de Concepción (Chile).
Special Note: In Spanish
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.
Cornell University. Forest Health and Invasive Non-native Forest Pests.
Cornell University. New York State Integrated Pest Management Program.
Pennsylvania State University. Cooperative Extension.