Images of plants. Genus names: Saaa through SE//aaaaa. (List for the Lower Colorado River Valley, a part of the Sonoran Desert, transitioning to the Mojave Desert in the north, towards Hoover Dam, and Las Vegas.) This transitioning to the Mojave Desert, also includes Northwest Arizona, from Needles, California, to Kingman, Arizona, and parts of the Arizona Strip, and Virgin River Canyon.