Links
BC - Field Guide to Noxious and Other Selected Weeds of British Columbia - Marsh Plume Thistle (Cirsium palustre)- photos and brief information
Flora of North America - Cirsium palustre - taxonomy and North American distribution
New England - Invasive Plant Atlas of New England - Cirsium palustre (Marsh Thistle) - fact sheet
USDA PLANTS Database - PLANTS Profile: Cirsium palustre - characteristics, illustration, US distribution
Wisconsin Department of Natural Resources - European Marsh Thistle (Cirsium palustre) - fact sheet and photos
WI - Freckmann Herbarium, UW-Stevens Point - Cirsium palustre - characteristics, photos, Wisconsin distribution
Wisconsin State Herbarium: Wisconsin Vascular Plants - Cirsium palustre -characteristics, photo, Wisconsin distribution
WI - UW-Green Bay Herbarium, Cofrin Center for Biodiversity - Cirsium palustre - brief information and photos