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.
Citron
Today the citron is used for the fragrance or zest of its flavedo, but the most important part is still the inner rind (known as pith or "albedo"), which is a fairly important article in international trade and is widely employed in the food industry as succade, as it is known when it is candied in sugar.