Wildflowers and Botany
Photographic archive of the American Southwest and abroad, helping to preserve and document natural and cultural resources for conservation, education, and research.
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Arizona thistle (Cirsium arizonicum), Zion Canyon National Park, Washington County, Utah
Cirsium arizonicum is native to the western United States. More information can be found at en.wikipedia.org/wiki/Cirsium_arizonicum
