I promised flowers on my Twitter feed, and I am a day late. Alain is still trying to make FYWP work.
I took a great many wildflower photos on my trip. The reason I went to Yellowstone at this heavily populated time of year was to see the flowers. They were wonderful. Here are a few photos from the Upper Geyser Basin, where Old Faithful is located. The book I’m using to identify the flowers is Flora Of The Yellowstone, by Whitney Tilt.
Blue-eyed grass, Sisyrinchium montanum (1-2 cm)