Zea
From eagle-rock.org
Zea is a genus of grasses in the family Poaceae. Several species are commonly known as teosintes and are found in Mexico, Guatemala, and Nicaragua.
There are five recognized species in the genus: Zea diploperennis, Zea perennis, Zea luxurians, Zea nicaraguensis, and Zea mays. The last species is further divided into four subspecies: huehuetenangensis, mexicana, parviglumis, and mays. The first three subspecies are teosintes; the last is maize, or corn, the only domesticated taxon in the genus Zea.