There are over 2000 species of named euphorbias. Not all of them are succulents. They come in all shapes and sizes. Some are large and tree-like while many are small like cactus. They are found in Madagascar ,Africa, the Middle East and the Americas. They are sun-loving, and certainly prefer the warm to cold. They grown from seeds, cuttings, rhizomes, and sometimes even leaves. But care must be taken when dealing with these plants because they contain a poisonous sap, milky in appearance. Wash your hands thorouhgly after any contact.
The Flame of Jamaica is my Euphorbia of the Year
Some Euphorbia Species