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
Plant development forms is referred to as 'vegetative phase change', but there is some disagreement about terminology. Plant structures, including, roots, buds, and shoots, that develop in unusual locations are called "adventitious". Such structures are common in vascular plants. Adventitious roots and buds usually develop near the existing vascular tissues so they can connect to the xylem and phloem. However, the exact location varies greatly. In young stems, adventitious roots often form from parenchyma between the vascular bundles. In stems with secondary growth, adventitious roots often originate in phloem parenchyma near the vascular cambium. In stem cuttings, adventitious roots sometimes also originate