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Scotch Thistle

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Scotch thistle
Scotch thistle, flowers - Photo by Steve Dewey; Utah State University
Scientific Name: 
Onopordum acanthium L. (ITIS)
Common Name: 
Scotch thistle, cotton thistle, heraldic thistle, woolly thistle
Native To: 
Date of U.S. Introduction: 
Means of Introduction: 
Impact: 
Crowds out desirable forage (Schuster and Prather 2003)

Distribution / Maps / Survey Status

University of Georgia. Center for Invasive Species and Ecosystem Health.
Provides state, county, point and GIS data. Maps can be downloaded and shared.

Images

University of Georgia. Center for Invasive Species and Ecosystem Health.

Videos

Google. YouTube; University of Arizona. Coconino County Cooperative Extension.

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 Scotch Thistle.

Council or Task Force

Invasive Species Council of British Columbia (Canada).

See also: Publications for more resources

Washington State Recreation and Conservation Office. Washington Invasive Species Council.

Partnership
IUCN. Species Survival Commission. Invasive Species Specialist Group.
University of Georgia. Center for Invasive Species and Ecosystem Health.

Centre for Invasive Species Solutions; Atlas of Living Australia; Australian Government. Department of Agriculture, Water and the Environment.

Federal Government
USDA. NRCS. National Plant Data Center.

USDA. ARS. National Genetic Resources Program. GRIN-Global.

International Government
New South Wales Department of Primary Industries (Australia).

Victoria Department of Jobs, Precincts and Regions (Australia). Agriculture.

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

Colorado Department of Agriculture. Conservation Services Division. Noxious Weed Program.

Academic
University of California. Weed Research and Information Center.
See also: Weeds in Natural Areas for more information sheets
University of Idaho; Oregon State University; Washington State University. Pacific Northwest Extension.
Professional
Colorado Weed Management Association.

Citations