Random invasive species images that represents what NISIC does
USDA.gov NAL NISIC Sudden oak death Formosan subterranean termite Yellow star thistle Giant African snail Cactus moth Purple loosestrife
HomeAbout National Invasive Species Information Center (NISIC)News and EventscouncilHelpContact Us
 Search the National Invasive Species Information Center
Search all USDA
Advanced Search
Search Tips
Browse by Geography
United States
Browse by Subject
Aquatic Species
Economic Impacts
Laws and Regulations
Manager's Tool Kit
Resource Library
You are here: Home / Plants / Species Profiles / Russian Knapweed
Species Profiles

Russian Knapweed

Russian Knapweed

Scientific name: Rhaponticum repens (L.) Hidalgo (ITIS)

Synonyms: Centaurea repens (L.), Acroptilon repens (L.) DC.

Common names: Russian knapweed, Turestan thistle, creeping knapweed, mountain bluet, Russian cornflower, hardheads

Click image to enlarge

Selected Resources

Native To: Eurasia (Zouhar 2001)

Date of U.S. Introduction: Early 1900s (Zouhar 2001)

Means of Introduction: Accidentally as a seed contaminant (Zouhar 2001)

Impacts: Crowds out native species and desirable forage; toxic to horses (Zouhar 2001)

Current U.S. Distribution:



  • Russian Knapweed (or select Play button below)
    University of Wyoming Extension. Sustainable Management of Rangeland Resources Initiative Team. (YouTube)

Selected Resources:

Back to Top


Fact Sheet: Russian Knapweed (Jan 2014; PDF | 436 KB)
Alberta Invasive Plants Council (Canada).

Russian Knapweed (PDF | 1.95 MB)
Saskatchewan Invasive Species Council (Canada).


Invasive Plant Atlas of the United States - Russian Knapweed
University of Georgia. Center for Invasive Species and Ecosystem Health.

Texas Invasives Database - Acroptilon repens

Invasive Species Compendium - Rhaponticum repens
CAB International.


Rhaponticum repens (L.) Hidalgo - Germplasm Resources Information Network (GRIN)
USDA. ARS. National Genetic Resources Program.

Acroptilon repens - Fire Effects Information System (FEIS)
USDA. FS. Rocky Mountain Research Station. Fire Sciences Laboratory.

Field Guide for Managing Russian Knapweed in the Southwest (Dec 2012; PDF | 2.38 MB)
USDA. FS. Southwestern Region.

Ecology and Management of Russian Knapweed - Invasive Species Technical Note MT-7 (Dec 2006; PDF | 401 KB)
USDA. Natural Resources Conservation Service.

PLANTS Database - Hardheads
USDA. NRCS. National Plant Data Center.

Russian Knapweed - Guide to Weeds in British Columbia
British Columbia Ministry of Agriculture Food and Fisheries (Canada).


Russian knapweed - EncycloWeedia
California Department of Food and Agriculture.

Russian Knapweed - Best Management Practices Weed Profile (PDF | 210 KB)
Colorado State Parks.

Class B Noxious Weed: Russian Knapweed
Washington State Noxious Weed Control Board.


Russian Knapweed - Invasive Plant Species of Alaska (PDF | 262 KB)
University of Alaska - Anchorage. Alaska Natural Heritage Program.

Russian Knapweed
University of California. Statewide Integrated Pest Management Program.

Russian Knapweed
Colorado State University. Cooperative Extension.

Managing Russian Knapweed (PDF | 214 KB)
University of Nevada - Reno. Cooperative Extension.

Weed Factsheet - Russian Knapweed (PDF | 203 KB)
New Mexico State University.

Know Your Knapweeds (PDF | 153 KB)
North Dakota State University. Department of Plant Sciences.


Russian Knapweed
Colorado Weed Management Association.

Weed Identification - Russian Knapweed
Montana Weed Control Association.


Integrated Taxonomic Information System. Rhaponticum repens. [Accessed Sep 10, 2014].

Zouhar, K.L. 2001. Acroptilon repens. In: Fire Effects Information System. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory.

Back to Top
Last Modified: May 16, 2015
Bookmark and Share
I Want To
    Read Recent News Articles
    Find Management Plans
    Locate Images
    Find Experts

More ...

    Species Profiles
    Discussion Groups
    Economic Impacts
    Educational Resources
    Image Galleries
    Frequently Asked Questions
    What You Can Do
Media Help
 To view PDF files you must have Adobe Acrobat Reader installed on your computer.

To view Flash files you must  have Macromedia Flash Player installed on your computer.

 NISIC Home | NAL Home | USDA | AgNIC | Agricultural Research Service | Web Policies and Important Links | Site Map
FOIA | Accessibility Statement| Privacy Policy | Non-Discrimination Statement | Information Quality | USA.gov | White House