Poinsettia found in the center of each leaf bunch, and are called cyathia. The poinsettia is native to Mexico. It is found in the wild in deciduous tropical forests at moderate elevations from southern Sinaloa down the entire Pacific coast of Mexico to Chiapas and Guatemala. It is also found in the interior in the hot, seasonally dry forests of Guerrero, Oaxaca, and Chiapas. Reports of "E. pulcherrima" growing in the wild in Nicaragua and Costa Rica have yet to be confirmed by botanists. The Aztecs used the plant to produce red dye and as an antipyretic medication. In Nahuatl, the
Poinsettia by bright sunny days for around two months in autumn in order to encourage it to develop colored bracts. Any incidental light during these nights (from a nearby television set, from under a door frame, even from passing cars or street lights) hampers bract production. Commercial production of poinsettia has been done by placing them inside a greenhouse and covering the latter completely to imitate the natural biological situation. To produce extra axillary buds that are necessary for plants containing multiple flowers, a phytoplasma infection—whose symptoms include the proliferation of axillary buds—is used. The discovery of the role phytoplasmas play