This is orange globe mallow (Sphaeralcea munroana) -- we saw it in July (2005) near Newspaper Rock State Historic Monument in Utah (on the way to Canyonlands - Needles District). It's one of the only flowers in the desert that blooms in the middle of the hottest part of the summer. This day it was a relatively mild 108F.
On Explore/Interestingness #67 for 4/30. Thanks, all! :)