Saw this plant growing to heights of three to four feet (one to one and a half metres) in a mixed pine and deciduous forest in Algonquin Park (USDA zone 3). The berries or drupes are black. The leaf is almost ready to drop and is pictured on the left. The leaf on the right is from Viburnum trilobum "Wentworth" from my garden.
What is this plant? It looks like a native viburnum but I don't know which species.