Euphorbia, Poincettia,Hanbat Arboretum Tropical Garden Euphorbia is a huge genus, comprising some 1,000 species that vary widely in appearance and habit but share the characteristic of producing a poisonous milky-white sap. Of the several grown as ornamentals, perhaps the best known is E. pulcherrima, the Poinsetia, a Mexican native on which the small flowers are surrounded by..
