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Young bull thistle in the fall. Image courtesy of the slide collection of Jack Harper.
Image courtesy of Larry Kuhns.
Image courtesy of Larry Kuhns.
Image courtesy of Larry Kuhns.
Image courtesy of Larry Kuhns.
Image courtesy of Larry Kuhns.
Image courtesy of Larry Kuhns.
Image courtesy of Larry Kuhns.
Image courtesy of Larry Kuhns.
Image courtesy of Larry Kuhns.
Image courtesy of Larry Kuhns.
Image courtesy of Larry Kuhns.
Image courtesy of Matthew Naedel.
Spine. Image courtesy of Matthew Naedel.
Image courtesy of Matthew Naedel.