Blue corn
Blue corn (also known as Hopi maize, Yoeme Blue, Tarahumara Maiz Azul, and Rio Grande Blue) is several closely related varieties of flint corn grown in Mexico, the Southwestern United States, and the Southeastern United States. It is one of the main types of corn used for the traditional Southern and Central Mexican food known as tlacoyo.
It was originally developed by the Hopi, the Pueblo Indians of the Rio Grande in New Mexico, and several Southeastern Tribes, including the Cherokee. It remains an essential part of Hopi dishes like piki bread.