In the summer months this plant produces light blue flowers which are later followed by royal blue berries. This illustration was created by Tracy Howell a member of the Oxford Botanic Garden and Harcourt Arboretum Florilegium Group. This group produces botanical illustrations, either line drawings or paintings, of a high standard, for archival purposes. Botanical illustrations further the documentation of the living collections at the Garden and Arboretum, providing Oxford University Botanic Garden and Arboretum with an invaluable resource for the future.​