I presume that this beautiful Calochortus is Bruneau Mariposa Lily (Calochortus bruneaunis). My presumption is based in part on where I found it. If I had seen it a bit farther east, in NW Arizona, I might have guessed C. ambiguus instead. Photographed in Nevada on Mt Charleston between 7000' and 8000' elevation. Spring Mountains National Recreation Area, in the Humboldt-Toiyabe National Forest, Clark County, Nevada.
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