Scents do indeed being back memories - my first ones are of a large Philadelphus coronariusthat grew in the narrow back garden of the house I spent my early years in. I remember taking bunches of it,when in flower, to school. The overriding scent from those years however is of Chrysanthemums- everybody in the adjoining, terraced houses seems to grow some and their pungent scent would fill the air on damp autumn days.