Viburnum trilobum

''Viburnum trilobum'' is a species of ''Viburnum'' native to northern North America, from Newfoundland west to British Columbia, south to Washington state and east to northern Virginia. It is very closely related to the European and Asian ''Viburnum opulus'', and is often treated as a variety of it, as ''Viburnum opulus'' L. var. ''americanum'' Ait., or as a subspecies, ''Viburnum opulus'' subsp. ''trilobum'' Clausen.