In perennially water-starved Patagonia, Arizona, just 18 miles from the Mexico border, Gary Nabhan, well known as an author and ethnobotanist, farms a worldly array of desert crops that could make any food lover salivate. His harvest, more than 120 varieties strong, includes Sonoran pomegranates, Baja California Mission guavas, Winter Banana apples, amaranth, asparagus, globe artichokes, and even an arid-friendly Texas Mission variety of the infamously thirsty almond. The 5-acre farm, which he manages with his wife Laurie Monti, a medical anthropologist and professor of indigenous studies, grows these foods on precious little water—about 17 inches of rainfall a year, a dollop compared with the US-wide average of 28 inches.