Euphorbia, also commonly called "Spurge," is one of the largest genera of flowering plants. Spurge aren't cactus, but they do have some similarities in shape and drought tolerance. They have a simplified bloom with no petals, and it's more of the shape of the Euphorbia's body that people go crazy over. They're indeed known for their architecture. The Euphorbia evansii, is a smaller caliper upright Euphorbia with several smaller "arms" or "hairs" protruding from the main stalks.

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