Calypso bulbosa (Fairy Slipper orchid)

On our last day in Yellowstone National Park, my son Dylan had done some homework the night before, because he wanted to see a Moose. So, he planned our trip to an area that was supposed to show us a Moose, and it also was a wild orchid site. So, he knew he had a good chance of getting us to drive there. Well, we didn't see a Moose, but we did see a whole lot of wildflowers, including orchids.