Canada thistle

Cirsium arvense

Distribution map of Cirsium arvense
State(s) where reported invasive*: AK, AZ, CO, CT, DE, IA, ID, IN, MD, MI, MN, MO, MT, ND, NJ, OH, OR, PA, RI, SD, TN, VA, WA, WI, WV, WY

*Information from Swearingen, J. 2006. WeedUS database, Alien Plant Invaders of Natural Areas. Plant Conservation Alliance, Alien Plant Working Group. http://www.invasive.org/weedus/index.html

FACT SHEET LIST |APWG HOME PAGE

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http://www.nps.gov/plants/alien/fact/map/ciar1.htm
Last updated: 10-Apr-2007