The basic green form - Euphorbia trigona - also called African milk tree is native to Central Africa. 

Euphorbia trigona "Rubra" from the rejuvenation of the own mother plant (see picture), own propagation, planted in a permeable self-mixed organic substrate, repotting only desired in one year, not overfertilised therefore top healthy and robust (quality before quantity!), slow growing (with winter growth pause), not winter hardy, very beautiful green-red colouration of the leaves and the plant itself with sufficient sun, please no "shady corner" as location, avoid waterlogging! Enjoy your new Euphorbia trigona var. "Rubra".