Evergreen tree (scientific name: Dieffenbachia picta Lodd. ), also known as Dai Fenye, belongs to the evergreen genus of Araceae. There are about 30 native species of this genus, mainly distributed in tropical America. 65438+ was introduced to Britain in 1960s, and soon spread to Europe, America and Oceania. Widely cultivated all over the world, its cultivated varieties are various and have entered thousands of households.