This is a hybrid between Philadelphus pubescens and Philadelphus coronarius.The bark is brown and can usually be peeled. The leaves are slightly hairy on the underside. The white blossoms, 3 to 4cm (1¼ to 1½ in) across, are borne in five- to nine-flowered racemes. There is also a double form that is often cultivated in gardens.
Mock oranges are easily cross-bred. Breeding and selection has yielded countless hybrids and numerous garden forms. Some of the best known are ‘Albatre’, pure white, semi-double; ‘Belle Etoile’, single, white spotted with red; ‘Girandole’, double; ‘Lemoinei’, single, white, very fragrant; ‘Manteau d’Hermine’, double, creamy white; ‘Mont Blanc’, single, white; ‘Snowflake’, large-flowered, double, white; and ‘Schneesturm’, double, pure white, very floriferous.
Mock oranges are commonly grown in small gardens and parks, where their most important ornamental feature is the wealth of delightfully fragrant. They can be planted as solitary specimens, in groups and in rows. Forms or species of loose to arching habit are displayed to good effect when planted as solitary subjects. Particularly good are richly flowering forms. Suitable companions in mixed plantings are smaller, woody shrubs with foliage coloured throughout the growth period or at least in the autumn, and of the herbaceous plants perennials that flower in the autumn.