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Purple Star Thistle

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Purple star thistle
Scientific Name:
Centaurea calcitrapa L. (ITIS)
Common Name:
Purple star thistle, red star thistle, common star thistle
Purple starthistle, flower - Photo by Malcolm Storey; BioImages, Virtual Field-Guide (UK)
Native To:
Mediterranean Region (Pitcairn et al. 2002)
Date of U.S. Introduction:
First discovered in the late 1800s (Pitcairn et al. 2002)
Means of Introduction:
Crowds out desirable forage species on rangelands (Pitcairn et al. 2002)

Distribution/Maps/Survey Status



Selected Resources

The section below contains highly relevant resources for this species, organized by source. Or, to display all related content view all resources for Purple Star Thistle.

Council or Task Force

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.

Texas State University System. Texas Invasive Species Institute.

Federal Government

DOI. NPS. Science of the American Southwest.

See also: Fact Sheets for Invasive Exotic Plants for more fact sheets
USDA. NRCS. National Plant Data Center.
USDA. ARS. National Genetic Resources Program. GRIN-Global.

International Government

Australian Government. Department of the Environment and Energy.

State and Local Government

Washington State Noxious Weed Control Board.
California Department of Food and Agriculture.
See also: Included on California's noxious weed list; see Encycloweedia: Program Details for additional resources


University of California. Weed Research and Information Center.
See also: Weeds in Natural Areas for more information sheets


Marin Agricultural Land Trust (California).