Council or Task Force
Priority Species: Knapweed
Washington State Recreation and Conservation Office. Washington Invasive Species Council.
Fact Sheet: Spotted Knapweed (Jan 2014; PDF | 801 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
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
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
Global Invasive Species Database - Centaurea biebersteinii (herb)
IUCN. Species Survival Commission. Invasive Species Specialist Group.
U.S. National Plant Germplasm System - Centaurea stoebe
USDA. ARS. National Genetic Resources Program. GRIN-Global.
and Biological Control of Knapweed (Apr 2005, 3rd Ed; PDF | 2.85 MB)
Forest Health Technology Enterprise Team.
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.
Weeds in Australia -
Spotted Knapweed (Centaurea stoebe subsp. micranthos)
Australian Government. Department of the Environment and Energy.
Encycloweedia: Data Sheet - Centaurea genus
California Department of Food and Agriculture.
See also: 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
B Noxious Weed: Spotted Knapweed
Washington State Noxious Weed Control Board.
King County (Washington) Noxious Weed Control Program - Spotted Knapweed
King County Department of Natural Resources (Washington).
Water and Land Resources Division.
Wisconsin Department of Natural Resources.
Diffuse and Spotted Knapweed
Colorado State University. Cooperative Extension.
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.
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 |
University of Pennsylvania. The Pennsylvania Flora Project of Morris Arboretum.
See also: Invasive Plant Fact Sheets for additional invasive plants in Pennsylvania
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).