Citron
There are also a number of citron hybrids; for example, ponderosa lemon, the lumia and rhobs el Arsa are known citron hybrids, some are claiming that even the Florentine citron is not pure citron, but a citron hybrid.
Citreae
Three sub-tribes are included:
Notable species in the Citrinae group include Bergamot orange, calamondin, citron, grapefruit, lemon, lime, orange, pummelo, tangelo, and tangerine, all of which are in the genus "Citrus".