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You are here: Home / Plants / Species Profiles / Scotch Thistle
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Species Profiles

Scotch Thistle

Scotch ThistleScientific name: Onopordum acanthium L.

Common names: Scotch thistle, cotton thistle, heraldic thistle, woolly thistle

Click image to enlarge

Native To: Eurasia (Briese et al. 2003)

Date of U.S. Introduction: 1800s (Schuster and Prather 2003)

Images: Invasive.org and Google

Means of Introduction: Ornamental (Schuster and Prather 2003)

Impact: Crowds out desirable forage (Schuster and Prather 2003)

Current U.S. Distribution:

U.S. States and U.S. National Parks Where Reported Invasive: Invasive Plant Atlas of the United States map

Management Plans: Plants

Selected Internet Resources:

Federal Government

Onopordum acanthium
Integrated Taxonomic Information System.
Taxonomy

Onopordum acanthium L. (Scotch Thistle) - Noxious and Nuisance Plant Management Information System (PMIS)
DOD. USACE. Engineer Research and Development Center. Environmental Laboratory.
Identification/Description; Photographs; Introduction History; Impacts; Distribution

Onopordum acanthium Article Citation Search - AGRICOLA Database
USDA. National Agricultural Library.
Research; Special Note: NAL Catalog Search (resources)

Onopordum acanthium - Germplasm Resources Information Network (GRIN)
USDA. ARS. National Genetic Resources Program.
Taxonomy; Legal Aspects

Scotch Thistle - Weed of the Week (Aug 27, 2005; PDF | 431 KB)
USDA. FS. Northeastern Area. Forest Health Protection.
Identification/Description; Photographs; Introduction History; Impacts; Habitat; Distribution; Controls

Plant profile for Onopordum acanthium - PLANTS Database
USDA. NRCS. National Plant Data Center.
Taxonomy; Photographs; Distribution; Legal Aspects

Scotch Thistle
DOI. BLM. Eagle Lake Field Office.
Identification/Description; Photographs; Habitat; Distribution

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State Government

Onopordum genus - EncycloWeedia
California Department of Food and Agriculture.
Identification/Description; Photographs; Habitat; Distribution; Dispersion; Controls

Integrated Weed Management of Scotch Thistle (PDF | 171 KB)
State of Colorado. Douglas County. Public Works.
Identification/Description; Photographs; Controls

Scotch Thistle - Noxious Weed Identification List
State of Colorado. Jefferson County Weed and Pest Management Program.
Identification/Description; Photographs; Controls

Scotch Thistle
Colorado Department of Agriculture. Noxious Weed Management Program.
Identification/Description; Photographs; Introduction History; Impacts; Distribution; Controls

Scotch Thistle
State of Utah. Weber County Weed Abatement.
Identification/Description; Photographs; Habitat; Dispersion; Controls

Stop the Invasion: Scotch Thistle (May 2011; PDF | 606 KB)
Washington Invasive Species Council.
Identification/Description; Photographs; Introduction History; Impacts; Distribution; Legal Aspects

Class B Noxious Weed: Scotch Thistle
Washington State Noxious Weed Control Board.
Taxonomy; Identification/Description; Photographs; Impacts; Habitat; Distribution; Dispersion; Controls; Legal Aspects

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University/Academic

Onopordum acanthium (Scotch thistle) - Invasive Plant Atlas of New England (IPANE)
University of Connecticut. Ecology and Evolutionary Biology.
Taxonomy; Identification/Description; Photographs; Introduction History; Distribution; Dispersion; Controls

Scotch Thistle - Invasive Plant Atlas of the United States
University of Georgia. Center for Invasive Species and Ecosystem Health.
Taxonomy; Identification/Description; Photographs; Introduction History; Distribution

Scotch Thistle (PNW 569) (PDF | 95 KB)
University of Idaho. Pacific Northwest Extension.
Identification/Description; Photographs; Introduction History; Life Cycle; Habitat; Distribution; Dispersion; Controls

Scotch Thistle - Weeds of North Central States
University of Illinois. Extension.
Identification/Description; Illustrations

Managing Scotch Thistle (PDF | 392 KB)
University of Nevada - Reno. Cooperative Extension.
Identification/Description; Photographs; Impacts; Life Cycle; Habitat; Controls

Scotch Thistle Wanted Poster--Dead, Not Alive! (PDF | 202 KB)
University of Nevada - Reno. Cooperative Extension.
Identification/Description; Photographs

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International

Onopordum acanthium - Invasive Species Compendium
Centre for Agricultural Bioscience International (CABI).
Taxonomy; Identification/Description; Photographs; Impacts; Life Cycle; Habitat; Distribution; Controls

Scotch thistle - Information Notes
Victoria Department of Primary Industries (Australia).
Identification/Description; Photographs; Dispersion; Controls; Legal Aspects

Scotch Thistle - Guide to Weeds in British Columbia
British Columbia Ministry of Agriculture Food and Fisheries (Canada).
Identification/Description; Photographs; Illustrations; Impacts; Life Cycle; Habitat; Distribution; Dispersion; Controls

Cotton Thistle - Plant Pest Control (PDF | 110 KB)
Hawke's Bay Regional Council (New Zealand).
Identification/Description; Photographs; Distribution; Controls

Weed Profile: Scoth, Illyrian & stemless
New South Wales Department of Primary Industries (Australia).
Identification/Description; Photographs; Impacts; Distribution; Dispersion; Controls; Legal Aspects

Onopordum acanthium (herb) - ISSG Global Invasive Species Database
World Conservation Union. Invasive Species Specialist Group.
Taxonomy; Identification/Description; Photographs; Impacts; Life Cycle; Habitat; Distribution; Controls

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Organizations

Scotch Thistle
Colorado Weed Management Association.
Identification/Description; Photographs; Life Cycle; Habitat; Distribution; Dispersion

Onopordum acanthium
Discover Life.
Taxonomy; Identification/Description; Photographs; Impacts; Habitat; Distribution; Dispersion; Controls

Scotch Thistle
Eastern Forest Environmental Threat Assessment Center.
Identification/Description; Photographs; Introduction History; Life Cycle; Habitat; Distribution

Onopordum acanthium
Texasinvasives.org.
Taxonomy; Identification/Description; Photographs; Introduction History; Impacts; Life Cycle; Habitat; Distribution; Dispersion; Controls; Special Note: References

Citations

Briese, D.T., S. Bottcher, J. Vitou, and T. Thomann. 2003. Prevalence and impact of the crown fly, Botanophila spinosa, on its host thistle, Onopordum acanthium, in southern France. Acta Oecologica 24(2):77-86.

Schuster, M., and T.S. Prather. 2003. Scotch thistle (PDF | 95 KB) University of Idaho. Pacific Northwest Extension Publication PNW 569.

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Last Modified: Jan 04, 2014
 
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