Descriptions of vascular plants and examples of the deleterious effects of nonindigenous species, with links to distribution maps, species lists and related information on vascular plants.
Information concerning status and trends of biological resources, focusing on forbs, herbaceous flowering plants that are not grasses, such as clover, sunflower, and milkweed
News and references about domesticated and wild bees, butterflies, moths, birds, bats and other animals that play a crucial role in the pollination of flowering plants.
Literature review of sago pondweed, a submersed angiosperm that attracts waterfowl, but is also a nuisance plant that clogs irrigation systems. Includes classification, distribution, habitat, physiology, management, and economics.
Life history and identification of Salvinia species, a floating, rootless tree fern and a noxious aquatic weed. Site includes posters, instructions on submitting sightings, how to subscribe to a listserv on the weed, and a bibliography.
U.S. Department of the Interior |
U.S. Geological Survey