A large, vigorous, multi-stemmed deciduous shrub grown above all for its intensely fragrant pure-white flowers, which open in cupped clusters in late spring to early summer and carry a rich scent very like orange blossom. Native to southeastern Europe and the Caucasus region (not North America), it forms an arching, dense, oval mound 10-12 feet tall and is one of the most reliable old-fashioned fragrance shrubs for full sun to part shade — easy, cold-hardy, and undemanding once established, though its display is a single, glorious, several-week burst rather than a long season.