As winter approaches, you might notice that peaches and plums are disappearing from the produce aisle, and berry prices going through the roof. But look! The new citrus fruit is here to give us a taste of the tropics in time for the winter holidays. Citrus fruits all belong to the genus Citrus, and can be hybridized with each other. The citrus fruits we know were developed from just a few that occur in the wild, including citron, pomelo, and mandarin. The variety of citrus fruits we encounter at the grocery store in the winter months are mostly hybridized from those species and their descendants. Read about the various citrus fruit in a list I posted at mental_floss.