The orange is a globose, reddish-yellow bitter or sweet edible citrus fruit of the orange tree (Citrus aurantium of the fanily Rutacese). There are various varieties of orange, but the two main types are the sweet and the bitter or Seville orange while the bergamot orange (Citrus Bergamia) yields oil of bergamot which is used in perfumery. Orange trees are highly prolific, and bear glossy, evergreen leaves and masses of white, sweet-scented flowers, which yield oil of neroli upon distillation.The orange tree is a nature of Asia, and the sweet orange was introduced to Europe from China by the Portuguese in 1547. Oranges grown for export are collected while still green and lack the delicate flavour which characterizes the naturally ripened fruit. Research Orange