Description Euphorbia trigona, also known as the African Milk Tree, is an upright, branching succulent in the Euphorbaceae family. Its candelabra growth habit resembles that of a cactus, except for the small leaves that emerge on the ridges. Segments are easy to propagate, but sharp thorns and skin-irritating sap mean this plant should be handled with care. Care of Euphorbia trigona: Full sun to partial shade, temp 40 to 100 degrees, generally grows to about 6 ft tall indoors but can grow much larger, allow to get dry between waterings. Family: Euphorbiaceae This plant is shipped in a 3.5 - 4 inch pot.