Viburnum are a useful group of evergreen and deciduous flowering shrubs. Some flower on bare wood, and in different seasons. Viburnum opulus is deciduous and is a wild native, common in hedgerows, Viburnum davidii is evergreen and makes little mounds, Viburnum tinus is evergreen and makes a decent hedge, Viburnum bodnantense is deciduous and flowers in the winter. There is even one commonly called the Snowball Tree.