level of acid. They are only vaguely popular in Brazil.Navel oranges, mostly grown in California, "have a small secondary fruit growing at one end of the main fruit." (World book encyclopedia) they have a good flavor, but produce little juice.Another type of orange is sour, or bitter oranges, which are usually not even freshly eaten, like common oranges because of a bitter taste. They are mostly grown in Europe, and used for making marmalade. The peels are turned into oil, and used for perfume.Mandarins are the ones that usually come at Christmas (in Canada), and are generally eaten fresh. They actually aren't oranges, just referred to oranges because of their similar appearance to common oranges.Oranges are part of the rutaceae family. The species of the different kind of oranges are: sweet oranges are citrus sinensis; sour oranges are citrus aurantium; and mandarins are citrus reticulata. ...
