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, own propagation, a rooted stem cutting about 10cm long, which will then sprout laterally several times; not overfertilised therefore top healthy and robust (quality before quantity!), grown slowly (with winter growth pause), not hardy, very beautiful green-red discolouration of the leaves and the plant itself with sufficient sun, please no "shady corner" as location, avoid waterlogging!  Delivery without pot & substrate - please plant in permeable organic cactus substrate; enjoy your new Euphorbia trigona var. "Rubra".