Canada Thistle

Cirsium arvense

Canada thistle is a state designated noxious weed in Wyoming.

Cirsium arvense

Photo by Steve Dewey, Utah State University, Bugwood.org

Estimated       Overall
Acres Maps  Trends Maps
  2013              2013
  2010              2010
  2007              2007
  2005              2005
  2003              2003

Explanation of Maps

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