Canada thistle USDA PLANTS Symbol: CIAR4
U.S. Nativity: Exotic
Habit: Herb
Cirsium arvense (L.) Scop.
Taxonomic Rank: Magnoliopsida: Asterales: Asteraceae
Synonym(s): Californian thistle, creeping thistle, field thistle
Native Range: Europe (BAIL);

U.S. State(s) where reported invasive:

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U.S. National Parks where reported invasive:
Antietam National Battlefield (Maryland)
Badlands National Park (South Dakota)
Blue Ridge Parkway (North Carolina)
Catoctin Mountain Park (Maryland)
Colonial National Historical Park (Virginia)
Craters of the Moon National Monument (Idaho)
Devils Tower National Monument (Wyoming)
Dinosaur National Monument (Colorado)
Grand Canyon National Park (Arizona)
Great Smoky Mountains National Park (North Carolina & Tennessee)
Harpers Ferry National Historical Park (West Virginia)
Indiana Dunes National Lakeshore (Indiana)
Manassas National Battlefield Park (Virginia)
Monocacy National Battlefield Park (Maryland)
Redwood National Park (California)
Rocky Mountains National Park (Colorado)
Saint Croix National Scenic Riverway (Wisconsin)
Theodore Roosevelt National Park (North Dakota)
Yellowstone National Park (Wyoming)