The olive is a species of a small tree in the family Oleaceae (olive family). Its fruit, also called the olive, is of major agricultural importance in the Mediterranean region as the source of olive oil. The tree and its fruit give its name to the plant family, which also includes species such as lilacs, jasmine, Forsythia and the true ash trees. The olive tree has been cultivated for olive oil, fine wood, olive leaf, and the olive fruit.