Mandarin oranges are a large and varied group of citrus that share several traits. Most notably, mandarins are loose skinned fruits—so loose that they are sometimes called zipper-skinned. Mandarins are also generally smaller and flattened looking, and they typically are sweeter than sweet oranges. There are many well known varieties of mandarins—some of which are also called tangerines: Clementine, Dancy, Encore, Fremont, Honey, Kara, Kinnow, Mediterranean, Pixie, Ponkan, Satsuma, and Wilking.