Relatively new into cultivation, these plants are closely related to Hydrangeas, indeed they are often referred to as Herbaceous Hydrangeas. From stout knobbly rhizomes emerge slender shoots which hold the deep green roughly textured, deeply veined serrated leaves. These can be up to 15 cms long on happy plants. In late summer the waxy rich purple-blue flowers are borne in loose clusters which may have the occasional sterile floret. A worthy addition to the woodland garden where the soil will not get too dry.