Cactus euphorbia refers to the plant species that belong to the family Euphorbiaceae. The plant is native to tropical regions and arid areas, and it is highly appreciated for its ornamental value. Cactus euphorbia is known by different names such as crown of thorns, Christ plant, and the Holy plant. Other synonyms include spurge cactus, candelabra cactus, cow's-horn euphorbia, and key lime cactus. This is because of the plant's unique appearance, which is characterized by its spiky branches and colorful flowers. Cactus euphorbia is also used in traditional medicine and in some cultures, it is considered a symbol of protection and purity.