For me, many of the thistles can be quite confusing, but fortunately this one is easy to tell apart because it's the only native one in the area. It's Arizona thistle (Cirsium arizonicum), native to California, Nevada, Utah, New Mexico, and Arizona.
It grows from 6,500 to 10,100 feet in this area, and at lower elevations elsewhere, and on open, dry slopes.
For more information about Arizona thistle, click here.
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