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Picture of Canada thistle Plant press of Canada thistle
Canada thistle
Cirsium arvense (L.) Scop.


Plant Description:

  • Very widespread, introduced weed, growing up to 1 m tall
  • Numerous flower heads that have a feathery appearance with large bracts underneath
  • Leaves are largely dissected and are prickly
  • Found along roadsides, wet areas, and disturbed sites
  • Found at Stops 1 through 12


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-Sourced from Budd's Flora of the Canadian Prairie Provinces, 1979 and
Plants of the Western Boreal Forest & Aspen Parkland, 1995.
Refer to references for full publication details.

Page last updated on 2004-10-07
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