The Viburnum prunifolium, aka Blackhaw Viburnum, is another deciduous shrub but may be grown as a small, single-trunk tree. As a shrub, it typically grows 12 to 15 feet with a spread of 6 to 12 ...

The Dispensatory of the United States of America, twenty-fifth edition, edit. by Osal, A., and Farrer, G. E. (J. B. Lippincott Co., Philadelphia, Pa., 1960).