Yes. Phoenix is pure Sonoran Desert (saguaro) and Vegas is pure Mojave Desert (Joshua tree). The floral boundary between the two deserts is very noticeable on Highway 93 between Wickenburg (Sonoran) and Kingman (Mojave).
It’s a great stretch of road. At some point the saguaros peter out and the Joshua trees take over, but there’s a wonderful transition zone (I believe near Wikieup) that features JTs growing next to saguaros.
Beautiful to the botanist and non-botanist alike!
Yup. Some folks would find it boring. We enjoyed the heck out of it.