The Euphorbia ingens, also called the candelabra tree. Very easy growing can grow up to 5 feet of height have them at 1feet height. The Euphorbia ingens, also called the candelabra tree, the cowboy cactus and the good luck cactus, is a spiny, succulent plant that features cactus like, segmented arms growing from a single trunk, with bright yellow blossoms on the tips of its branches in late spring.