Diego de Landa records how the Spanish introduced millet into Yucatan in the 16th century; it is said that it "grows marvellously well."
Diego de Landa, Landa’s Relación De Las Cosas De Yucatan: A Translation, ed. Alfred M. Tozzer (New York: Kraus Reprint Corporation, 1966), 195-96
The seeds which they have for human sustenance are a very good maize of many varieties and colors and they gather a great deal of it and make granaries and keep it in the underground places for the barren years. There are two kinds of small beans, some black and others of different colors and still others which the Spaniards have brought, whitish and small. Of their pepper there are many different kinds of squashes and gourds, the seeds of some are good for making stews, others for eating roasted or boiled and others for making vessels for their use. Now they have melons and very good ones and Spanish gourds. We have set them to raising millet and it grows marvellously well and is a good kind of sustenance.
In ibid., 196n1052, we read that "Lundell reports there is no species known from Yucatan."