RHH's photos with the keyword: cluster thistle

I believe I have this identified correctly. It is another of my wife's photos taken along the Yellowhead Highway in British Columbia and somewhere within Mount Robson Park. My commenting will be delayed today since I am going to do some bushwhacking with son Edward in the area of Slide Mountain, looking for several waterfalls and for fossils.

I am not actually certain of the identification of this thistle as the Cluster Thistle or Cirsium brevistylum. I did not take enough pictures to make an accurate ID when I had my references handy. It was photographed in Yellowstone National Park.