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U.S. Department of Agriculture
National Invasive Species Information Center
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Invasive Species Resources

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Class B Noxious Weed: Japanese Knotweed
Washington State Noxious Weed Control Board.
Class B Noxious Weed: Leafy Spurge
Washington State Noxious Weed Control Board.
Class B Noxious Weed: Lesser Celandine
Washington State Noxious Weed Control Board.
Class B Noxious Weed: Musk Thistle
Washington State Noxious Weed Control Board.
Class B Noxious Weed: Purple Loosestrife
Washington State Noxious Weed Control Board.
Class B Noxious Weed: Russian Knapweed
Washington State Noxious Weed Control Board.
Class B Noxious Weed: Saltcedar
Washington State Noxious Weed Control Board.
Class B Noxious Weed: Scotch Broom
Washington State Noxious Weed Control Board.
Class B Noxious Weed: Scotch Thistle
Washington State Noxious Weed Control Board.
Class B Noxious Weed: Spotted Knapweed
Washington State Noxious Weed Control Board.
Class B Noxious Weed: Yellow Starthistle
Washington State Noxious Weed Control Board.
Class C Noxious Weed: Canada Thistle
Washington State Noxious Weed Control Board.
Class C Noxious Weed: Common St. Johnswort
Washington State Noxious Weed Control Board.
Class C Noxious Weed: Common Teasel
Washington State Noxious Weed Control Board.
Class C Noxious Weed: Hoary Cress
Washington State Noxious Weed Control Board.
Class C Noxious Weed: Tree-of-Heaven
Washington State Noxious Weed Control Board.
Coastal Habitat Invasives Monitoring Program
Salem Sound Coastwatch.
Connecticut Invasive Plant List (Nov 2014)
Connecticut Invasive Plant Working Group.
Connecticut Invasive Plant Working Group
University of Connecticut. Connecticut Invasive Plant Working Group.
Connecticut Mile-A-Minute Vine
University of Connecticut. Department of Plant Science and Landscape Architecture.