File talk:Unidentified thistle in Ontario, Canada 144a.jpg
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[edit]This is certainly not Cirsium arvense. It might be Cirsium vulgare, but I do not know where the photograph was taken and whether there are lookalikes in the area. -- Robert Flogaus-Faust (talk) 08:03, 26 August 2011 (UTC)
- The contributor's other photos are all from Ontario, Canada, so it is reasonably safe to assume it is from there - MPF (talk) 12:56, 5 June 2024 (UTC)