Euphorbia pulcherrima, the botanical name, or poinsettia as we call it, is native to Mexico and Guatemala in Central America. Poinsettia plants are part of the Euphorbiaceae family. Many plants in this family ooze a milky sap. The botanical name, Euphorbia pulcherrima, was given to the poinsettia by German botanist, Karl Ludwig Wilenow. The plant grew through a crack in his greenhouse. Dazzled by its color, he gave it the botanical name Euphorbia pulcherrima, meaning “very beautiful”.