Euphorbia milii, also known as Crown of Thorns, is a popular and versatile houseplant known for its sharp, thorn-like flowers and characteristic milky sap. As a member of the Euphorbia family, E. milii has several synonyms, including Euphorbia splendens, Euphorbia bojeri, and Euphorbia lobata. In addition, there are several common names for this plant, including Christ plant, Christ thorn, and spurge. Euphorbia milii is a drought-tolerant plant that thrives in warm, sunny conditions, making it a perfect choice for those looking for a low-maintenance, yet striking plant for their homes or gardens.