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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
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.
University of Nevada - Reno. Cooperative Extension.
See also: Natural Resources Publications for more fact sheets
USDA. NRCS. National Plant Data Center.
Marin Agricultural Land Trust (California).
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.