I think I may have managed to photograph a flower that is “endemic to this area and found nowhere else in the world.”

White Frasera, according to my Falcon Guide, is “found in the montane forests of central and west-central ID” (page 209). Citadel of Rocks, where I found this, doesn’t technically fit the bill, since it is in the southern part of the state. Other possible candidates are Black Elderberry and Edible Tobacco Root.