Navel oranges â€“ sweet, juicy and full of zest. Usually seedless, they are easy to peel and ideal as a healthy snack at any time of the day. Navel and Navelina are seedless oranges that take their names from the Navel protuberance at the end, which contains a tiny embryonic fruit. They have thick, pebbly skins and very sweet juicy flesh. The main varieties of navels oranges are: Summer Navel (Lane Late, Barnfield and Wilson), and Winter Navel (Washington, Navelina and Leng). Available May to December.