Above the Chalco Valley to the Southwest of Mexico City, volcanoes Iztacihuatl and Popocatapetl watch over a corn field. The Chalqueno variety of maize, a local landrace, is dominant in part due to its adaptation to the climate at 2500 meters above sea level.
In Nauzontla, Puebla, beans vines cover miaze stalks.
The maize stalks are bent over so that the ears dry during the rainy season without collecting
water, but also provide a stronger support for the beans to climb on.