Spotted Knapweed

Invasive Species Council of British Columbia (Canada).

Alberta Invasive Species Council (Canada).

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

University of Alaska - Anchorage. Alaska Center for Conservation Science.

IUCN. Species Survival Commission. Invasive Species Specialist Group.

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

CAB International.

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

USDA. FS. Forest Health Technology Enterprise Team.

USDA. FS. Rocky Mountain Research Station. Fire Sciences Laboratory.

USDA. NRCS. National Plant Data Center.

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

Washington State Noxious Weed Control Board.

California Department of Food and Agriculture.

Missouri Department of Conservation.

Pennsylvania Department of Conservation and Natural Resources.

King County Department of Natural Resources (Washington). Water and Land Resources Division.

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

Wisconsin Department of Natural Resources.

Montana State University Extension.

University of Pennsylvania. The Pennsylvania Flora Project of Morris Arboretum.

Columbia University. Center for Environmental Research and Conservation.

North Dakota State University. Extension Service.

Colorado State University Extension.

University of Nebraska - Lincoln. Cooperative Extension.

Ohio State University. Ohio Agricultural Research and Development Center.

Colorado Weed Management Association.

Montana Weed Control Association.