Deciduous upright shrub (1.5-2m x 1.5m) with a rounded crown from North America, East Asia and Europe. Oval leaves on slender stems. Terminal clusters of fragrant white flowers in spring. Useful as a background plant where its floral display can be seen and its woody base hidden, or close to paths for its fragrance. Many forms available. Prefers alkaline moist loam. Sensitive to drought and wind.