Leaf scars are large with three groups of bundle scars . Terminal BUDS are about about a quarter to a third inch long and fuzzy. Side BUDS are knobby. BARK is firm and light to medium brown. The bark on larger trees is rough and separated by long raised ridges.
Husks start out green, sticky, and fuzzy and become dark brown with age.
Terminal BUDS are half the length of butternut but side buds and leaf scars are similar. BARK is dark brown or gray with deep furrows closer together than butternut. However, the U.P. is beyond the natural range of black walnut and occur only where planted, occasionally in Menominee and Delta counties. Trees that survive are often of lesser form but sometimes grow large. Black walnut, in its prime range, produces some of the most valuable timber in the United States.