Black walnut (Juglans nigra)
Walnuts have pinnately, compound leaves, deeply furrowed bark and twigs with brown chambered pith. The walnuts are produced in the fall in thickly-husked green fruits. They are edible and were a food source to Native Americans, but todays commercial walnuts come from another species. Black walnut is a source of valuable timber from forest-grown trees, especially for use in making furniture. A tree that was cut down in Richmond, Ind. was valued at $38,000. A brown dye is made from the husks of the fruits. Compounds that repel insect pests and inhibit the growth of other plants have been isolated from the leaves. The ground under black walnuts is often devoid of other plants.
To learn more about Black walnut, visit its profile at the USDA Plants Database