Oleaster (var. sylvestris) and subsp. cuspidata are suitable genetic resources for improvement of the olive Abstract The olive belongs to Olea, a complex genus and to a species with six subspecies. Subsp. europaea includes both the cultivated olive and the oleaster, the wild ancestor of the olive. Little is known on the phenotype of fruits from subsp. cuspidata. We the possible uses of these taxa for breeding both the olive and brown olive.