Cactus royenii L 1753 Cephalocereus brooksianusBritton & Rose Cephalocereus millspaughii Britton Cephalocereus nobilis (Haw.) Britton & Rose Cephalocereus urbanianus (K.Schum.) Britton & Rose Cereus nobilis Haw. Pilocereus urbanianus K.Schum. Pilosocereus millspaughii (Britton) Byles & G.D.Rowley[2]
Pilosocereus royenii is a species of cactus found throughout the West Indies and the states of Yucatán and Quintana Roo in Mexico. Common names include Royen's tree cactus,[3]dildo cactus,[4] and pipe organ cactus.[2] It is composed of multiple long, tubular shaped branches, each ribbed with multiple sections and sharp spines.