Sphaeralcea coulteri
One of the few annual Sphaeralcea, found in the Sonoran Desert.
Plant habit in the Sand Tank Mountains, 8 Mar 2008.
A flower in the Sand Tank Mountains, 8 Mar 2008.
Side view of flowers, showing calices, Sand Tank Mountains, 8 Mar 2008.
A cauline leaf in the Sand Tank Mts., 8 Mar 2008.