The Hawai'i-Pacific Weed Risk Assessment (HPWRA) is a free service that provides a background check on plants. Professional botanists use published information to answer 49 questions about a plant, to predict whether it is a low-risk or high-risk of becoming invasive in Hawai'i or similar Pacific islands.
Invasive Species Resources
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Thurston County Noxious Weed Control (Washington).
South Carolina Department of Natural Resources. Aquatic Nuisance Species Program.