The Officinal spurge (Euphorbia resinifera) belongs to Euphorbiaceae (the Spurge family). It is an evergreen herb that is native to Morocco in North Africa. It branches well from the base and is about 1.5 m high. The stem is columnar, has 4 ridges, and has thorns. In Roman times, this milk was used as a remedy for snake bites. The genus name is named after Euphorbus, a Mauritanian doctor who first used it. In horticulture, it is called "Shirozuno-kirin" (White horn spurge) in Japan.