The orange tree (Citrus sinensis), is a fruit tree of the Rutaceae family native to Asia. It is the result of a natural hybridisation between grapefruit (Citrus maxima) and mandarin (Citrus reticulata).
Growing to a height of up to ten metres, it has spiny branches and leaves of four to ten centimetres. Its fruit – actually a berry – is called sweet orange to distinguish it from that of the bitter orange tree (Citrus aurantium).
