Lovely, JP... looking forward to what you come up with!
Cathy, is the cereus Peruvians you're familiar with the edible apple type? There are a few genus of cereus. Because they bloom at night, they're commonly pollinated by moths or bats...some by flies. Usually plants that are pollinated by flies have a pungent scent to attract them. . Here in LA we can grow many types of desert plants, but our climate is Mediterranean.
Pearly- Whites, all your Arizona desert plants must be in full bloom!