Federal Government Sites and National Sites
Institute for Biological Invasions
University of Tennessee site with information about both plant and animal invasives
Invasivespecies.gov
Government site which provides links to information about invasive species
Invasive and Exotic Species of North America
Provides images of many invasive species
PLANTS database
Provides information about the plants of the United States
National Park Service – Weeds Gone Wild
Has many good factsheets on invasive plants
TNC Wildland Weeds site
Provides excellent documents providing information on invasive plants as well as control information
USDA Aphis Plan Protection and Quarantine Invasive Species
Provides information about invasive species and pest management
USGS Nonindigenous Aquatic Species
USGS site that provides excellent information about aquatic invaders (both plant and animal)
USGS Invasive Species Information Node
Provides links to acquire a variety of information on invasive species
Center for Invasive Plant Management (CIPM)
Management resources including a searchable restoration database
NatureServe's Invasive Species Assessment
An ongoing assessment of the impact of weed species in the U.S. available for downloading.
International Sites
Link to "Invasive Plants-Understanding the Threat" Conference
Provides images and general descriptions for many invasive plants
Global Compendium of Weeds home page
Allows searching for information about a weed of interest
Has factsheets with extensive information about invasive plants in Canada
Provides links to many invasive species sites
Ontario noxious weeds site
Has information on selected noxious weeds
State Sites
Connecticut Invasive Plant Working Group (CIPWG)
Provides information about invasive plants in Connecticut with good control information
Invasive Aquatic Plant Program of the Connecticut Agriculture Experiment station
Provides information about invasive aquatic plants in Connecticut
Georgia Exotic Pest Plant Council
Provides information about invasive plants in Georgia
Illinois Nature Preserves Commission
Provides factsheets and control information for some invasive plants
Massachusetts Nursery & Landscape Association
Provides information about the nursery industry and invasive species
Michigan Invasive Plant Council
Provides links to other invasive species sites
Minnesota Department of Natural Resources – Harmful Exotic Species
Homepage for information about both plant and animal invaders
Missouri vegetation management manual
Provides information on how to identify as well as control selected invasive species
Montana State weed science site
Provides information on agricultural weeds
New York Invasive Plant Council
Information about invasive plants in New York
Ohio State perennial and biennial weed site
Provides information for 100 or so weeds with excellent photographs
Rhode Island Wild Plant Society
Provides information about Rhode Island's invasive plants
Tennessee exotic plant management manual
Provides descriptive and control information about invasive plants of the Southeast
Vermont Department of Environmental Conservation
Has factsheets on selected aquatic invaders
Virginia Tech Dendrology
Provides a very brief description with great pictures of both non-invasive and invasive trees and shrubs
Virginia Department of Conservation and Recreation
Information about the invasive plants of Virginia with factsheets
Washington State noxious weed control board
Information about the invasive plants of Washington with pictures and descriptions
Wisconsin Department of Natural Resources
Provides information about the invasive and native plants of Wisconsin with good descriptions and control information
University of Florida Center for Aquatic and Invasive Plants
An excellent site for information about aquatic invasives as well as natives
Other Sites
Cornell University poison plant site
Provides information about poisonous plants in the Northeast
Ecology and Management of Invasive Plants Program – a Cornell site
Gives description of the damage caused by invasive plants as well as control (especially biological) information
Invasive Plant Species Workshop
Proceedings of the "Linking Ecology & Horticulture to Prevent Plant Invasions" workshop
Mid Atlantic Exotic Pest Plant Council
Provides information about invasive species in the Mid Atlantic states
Northeast Aquatic Nuisance Species Panel
Information on aquatic invasives (plant and animal) in the Northeast
Southeast Exotic Pest Plant Council
Information and links about the exotic plants of the Southeast