Yucca refers to several species of North American shrubs and trees that are typically found in desert or mountainous areas. Collectively, the yuccas are known by many common names, including Joshua tree, Adam's needle, Spanish bayonet and Our Lord’s candle. Our yucca root comes from Yucca schidigera, a species related to agave that occurs naturally in the southwestern U.S. Also known as Mohave yucca, the dried root is traditionally used to make soap and other cosmetics. Powdered yucca root, a good source of vitamins and minerals, is encapsulated as a dietary supplement.