Eastern Black Walnut:
The nut produced by the black walnut tree, the eastern black walnut, became the state tree nut on July 9, 1990. The nut has a variety of uses. The meat is used in ice cream, baked goods and candies. The shell provides the soft grit abrasive used in metal cleaning and polishing and oil well drilling, and is also used in paint products and as a filler in dynamite.