Among the valleys and foothills in Israel's Negev desert is a plant that can water itself, in a manner of speaking. A study of desert plants is a study of adaptive behaviors—the dry, hot climate demands it—but the desert rhubarb (Rheum palaestinum) is the only known desert-dwelling species to have evolved a self-irrigating mechanism.
Image may be NSFW.
Clik here to view.
