Botany Photo of the Day will have brief written entries on weekends, holidays and my vacations from April through September. – Daniel
Argemone munita, or prickly poppy, is divided into four subspecies. Assuming I’m correct in my identification to species (which I may not be), it was trivial to identify this to subspecies rotundata – it is the only subspecies which occurs in Nevada, where this photograph was taken.
Read more about prickly poppy via Calflora.net.