The smooth witherod or possumhaw viburnum is native to the eastern U.S. where it can be found growing in swamps. Its dark green and very shiny leaves differentiate it from many other viburnums. Smooth witherod viburnum bears abundant white flowers and fruit that starts out pink and matures to blue; it is one of the latest viburnums to bloom.

Viburnums are a versatile genus of multi-stemmed shrubs that are well suited to the home landscape due to their range of sizes and cultural adaptability. Some viburnums are noted for their fragrant flowers; most bear small fruit that may add visual interest. Many viburnums have attractive fall color. There are over 100 different varieties of viburnum at the Chicago Botanic Garden.