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You are here: Home / Plants / Species Profiles / Spotted Knapweed
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Species Profiles

Spotted Knapweed

Spotted Knapweed

Scientific name: Centaurea stoebe L. subsp. micranthos (Gugler) Hayek (ITIS)

Synonyms: Centaurea biebersteinii DC., Centaurea maculosa auct. non Lam. (ITIS)

Common name: Spotted knapweed

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Selected Resources

Native To: Europe (Zouhar 2001)

Date of U.S. Introduction: Late 1800s (Zouhar 2001)

Means of Introduction: Accidentally through contaminated seed or ballast (Zouhar 2001)

Impact: Crowds out native species and forage for livestock (Zouhar 2001)

Current U.S. Distribution:

Images:

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Selected Resources:

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Council or Task Force

Fact Sheet: Spotted Knapweed (Jan 2014; PDF | 794 KB)
Alberta Invasive Species Council (Canada).
See also: Fact Sheets for more information about individual invasive species, including those listed as "Prohibited Noxious" and "Noxious" under the Alberta Weed Control Act.

Partnership

Alaska Exotic Plants Information Clearinghouse (AKEPIC): Species Biography - Spotted Knapweed (Feb 7, 2011; PDF | 148 KB)
University of Alaska - Anchorage. Alaska Center for Conservation Science.
See also: Non-Native Plant Species List for additional factsheets (species biographies) and species risk assessment reports of non-native species present in Alaska and also non-native species currently not recorded in Alaska (potential invasives).

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

Least Wanted: Alien Plant Invaders of Natural Areas Fact Sheet - Spotted Knapweed
Plant Conservation Alliance. Alien Plant Working Group.

Invasive Species Compendium - Centaurea stoebe subsp. micranthos
CAB International.

Global Invasive Species Database - Centaurea biebersteinii (herb)
IUCN. Species Survival Commission. Invasive Species Specialist Group.

Federal Government

U.S. National Plant Germplasm System - Centaurea stoebe
USDA. ARS. National Genetic Resources Program. GRIN-Global.

Biology and Biological Control of Knapweed (Apr 2005, 3rd Ed; PDF | 2.85 MB)
USDA. FS. Forest Health Technology Enterprise Team.
FHTET-2001-07

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

PLANTS Database - Spotted Knapweed
USDA. NRCS. National Plant Data Center.

International Government

Weeds in Australia - Spotted Knapweed (Centaurea stoebe subsp. micranthos)
Australian Government. Department of the Environment and Energy.

State Government

Encycloweedia: Data Sheet - Centaurea genus
California Department of Food and Agriculture.
Included on California's noxious weed list; see Encycloweedia: Program Details for additional resources.

Noxious Weed Species - Spotted & Hybrid Knapweed
Colorado Department of Agriculture. Conservation Services Division. Noxious Weed Program.

Invasive Plants in Pennsylvania: Black, Brown and Spotted Knapweed (PDF | 1.2 MB)
Pennsylvania Department of Conservation and Natural Resources.

See also: Invasive Plants fact sheets (scroll to view) for plant species (trees, shrubs, vines, herbs and aquatic plants) that have impacted the state's natural lands.

Field Guide: Invasive - Spotted Knapweed
Missouri Department of Conservation.

See also: Problem Plant Control (scroll to Invasive Plants section) for more information to help you identify and control most common invasive plants in Missouri

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

Best Management Practices: Spotted Knapweed (Feb 2010; PDF | 303 KB)
King County (Washington). Noxious Weed Control Program.

Spotted Knapweed
Wisconsin Department of Natural Resources.

Academic

Diffuse and Spotted Knapweed
Colorado State University. Cooperative Extension.

Spotted and Diffuse Knapweed - Noxious Weeds of Nebraska (PDF | 1.11 MB)
University of Nebraska - Lincoln. Cooperative Extension.

Introduced Species Summary Project - Spotted Knapweed
Columbia University. Center for Environmental Research and Conservation.

Know Your Knapweeds
North Dakota State University. Extension Service.

Ohio Perennial & Biennial Weed Guide - Spotted Knapweed
Ohio State University. Ohio Agricultural Research and Development Center.

Invasive Plant Fact Sheet - Spotted Knapweed (Nov 2011; PDF | 167 KB)
University of Pennsylvania. The Pennsylvania Flora Project of Morris Arboretum.
See also: Invasive Plant Fact Sheets for additional invasive plants in Pennsylvania

Professional

Noxious Weed Information - Spotted Knapweed (B List)
Colorado Weed Management Association.

Weed Identification - Spotted Knapweed
Montana Weed Control Association.

BioBullies - Spotted Knapweed (PDF | 1.7 MB)
Natural Biodiversity (Western Pennsylvania).
See also: Invasive Species Fact Sheets for the worst trouble-makers in the region, and also for additional trouble-makers for you to watch out for.

Spotted Knapweed - Aliens Among Us
Royal British Columbia Museum (Canada).

Citations

Integrated Taxonomic Information System. Centaurea stoebe ssp. micranthos. [Accessed Mar 22, 2015].

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

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Last Modified: Sep 17, 2016
 
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