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Asteraceae · Cirsium

Cirsium arvense

Common name Canada thistle Family Asteraceae Genus Cirsium
28 states listed
Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming
State Classification Common Name Listed Notes
California B Canada thistle
Colorado Class C Canada thistle
Connecticut Restricted Canada thistle
Delaware Noxious Canada thistle
Georgia Restricted Canada thistle
Idaho Class B Canada thistle Restricted
Indiana Terrestrial Invasive Canada thistle Perennial herb
Iowa Noxious Canada thistle Perennial thistle
Kansas Class B Canada thistle Restricted
Kentucky Noxious Canada thistle Perennial thistle
Maine Prohibited Canada thistle Do Not Sell List
Maryland Prohibited Canada thistle Noxious
Michigan Prohibited Canada Thistle Perennial forb
Montana Priority 2B Canada Thistle Widespread
New Jersey Noxious Weed Canada Thistle Prohibited seed
New Mexico Class B Canada Thistle Perennial forb
New York Prohibited Canada Thistle Perennial forb
North Carolina Class B Canada Thistle Perennial forb
North Dakota Prohibited Canada Thistle Perennial forb
Ohio Prohibited Canada Thistle Perennial forb
Oklahoma Noxious Canada Thistle Perennial forb
Rhode Island Invasive Canada Thistle Perennial forb
South Dakota Class 1 Canada thistle Perennial
Virginia Tier 2 Canada thistle Perennial
Washington Class B Canada thistle Perennial
West Virginia Noxious Canada thistle Perennial
Wisconsin Noxious Canada thistle Perennial
Wyoming Designated Canada thistle Perennial
Source Data compiled from individual state Department of Agriculture noxious weed lists. Verify against current official state sources before regulatory use. U.S. Noxious Weed Database, generated April 2026.