If you're thinking about the design of your desert garden, here are some tips from a landscape architect. J. W. Zunino is a veteran Landscape Architect in Las Vegas. He talks with Angela O'Callaghan.
Sites referenced for Landscape Architects...
http://nsbla.state.nv.us/
http://www.asla.org/
Master Gardeners information hotline (702) 257-5555, Choose option 1 or 2, then 3 to speak to a Master Gardener.