Syringa
vulgaris is a species of flowering plant in the olive family Oleaceae, native to the Balkan
Peninsula, where it grows on rocky hills. This
species is widely cultivated as an ornamental and has been naturalized in other
parts of Europe as well as much of North
America. It is not regarded as an aggressive
species, found in the wild in widely scattered sites, usually in the vicinity
of past or present human habitations. Source