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Purple Star Thistle Resources

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University of California - Berkeley. Digital Library Project.
Washington State Noxious Weed Control Board.
University of Georgia. Center for Invasive Species and Ecosystem Health.
Provides state, county, point and GIS data. Maps can be downloaded and shared.
California Department of Food and Agriculture.
See also: Included on California's noxious weed list; see Encycloweedia: Program Details for additional resources

DOI. NPS. Science of the American Southwest.

See also: Fact Sheets for Invasive Exotic Plants for more fact sheets
University of Georgia. Center for Invasive Species and Ecosystem Health.

California Invasive Plant Council.

In online book: Bossard, C.C., J.M. Randall, and M.C. Hoshovsky (Editors). 2000. Invasive Plants of California's Wildlands. University of California Press. Berkeley, CA
University of Georgia. Center for Invasive Species and Ecosystem Health.
USDA. NRCS. National Plant Data Center.
Marin Agricultural Land Trust (California).

Texas State University System. Texas Invasive Species Institute.

USDA. ARS. National Genetic Resources Program. GRIN-Global.
University of California. Weed Research and Information Center.
See also: Weeds in Natural Areas for more information sheets
Australian Government. Department of the Environment and Energy.

Google. YouTube; Elsberg Studios.

Made for the Idaho Weed Awareness Campaign.