Italian Thistle

Carduus pycnocephalus

Italian thistle is a county declared weed in Big Horn, Converse and Washakie counties in Wyoming.

Carduus pycnocephalus

Photo by Rod Randall, Western Weeds

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

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