The spider photographed here was from my backyard in Maricopa, AZ. It hitched a ride on some tree clippings, and was trying to "blend in" on top of the recycle bin in the garage.
These spiders seem to be quite common here - I often find them in this very spot after I prune my Mesquite tree or tend to the garden. This is good news - it means plenty more photographing opportunities. These photos were taken with my 100mm macro lens and pop-up flash, so I know there is room for improvement.
From what I've read, Goldenrod Crab Spider - Misumena vatia and Whitebanded Crab Spider (Misumenoides formosipes) are two of the more common Arizona crab spiders. Unfortunately, neither seem to look like 'my spider'. In fact, I believe that this is a Misumenops species, perhaps a color variation of Misumenops Asperatus? My general purpose insect field guide, National Wildlife Federation Field Guide to Insects and Spiders & Related Species of North America, shows the Misumenops Asperatus in a different color phase. If any reader has any identification suggestions, please let me know.