Daisy, I am pretty sure this is not Sphaeralcea, I saw many of these in the States last summer (southern Utah, Arizona and N. Mexico), and they did not loook like your plant, Anisodontea spp. sounds more likely. I am not quite sure exactly which species of Sphaeralcea I have in the attached photo, there are around 60 species of globemallows in that region, and they are said to be very easy to recognize as a group, but very difficult to identify as a species, it could be S. ambigua, S. coulteri or S. coccinea.