A modern reference to temperate woody plants, including updated content from this site and much new material, can be found at Trees and Shrubs Online.




As now understood, this is a small genus of deciduous shrubs native to N. America. Its Asiatic relatives, which are of far greater importance in gardens, are now placed in the genus Weigela and are described in Vol. IV. The two genera are well distinguished from each other: in Diervilla the flowers are two-lipped, invariably yellow and borne on the current season’s growth; in Weigela the corolla is regular, yellow only in W. middendorfiana, and the flowers are borne on short lateral twigs on the growth of the previous year.

Species articles