New leaves on this Indian bean tree emerge wine colored to chocolate, segueing to green in summer. White flowers are lavender-tinged. Though it can reach 40 to 50 feet tall and wide, it can be pruned hard to keep it shrubby. Zones 5-9. forestfarm.com
Among the valleys and foothills in Israel's Negev desert is a plant that can water itself, in a manner of speaking. The desert rhubarb (Rheum palaestinum) is the only known desert-dwelling species to have evolved a self-irrigating mechanism.