Euphorbia, also commonly called "Spurge" is one of the largest genera of flowering plants.  Spurge can have some similarities to cactus in regards to shape and the ability to go through droughts although they are not cactus. They have a simplified bloom with no petals. It Is more of the shape of the Euphorbia's body that people go crazy over this Genus as they are indeed known for their architecture. The lactea, also called the "Candelabra Cactus" or "Dragon Bones", is an erect shrub with ribbed succulent branches.  Varieties that develop a pale stripe along the stems are often referred to as 'Milk Stripe' or 'Dragon Stripe'

Images are used for general reference only. The size, bloom state and shape of each plant will vary.