The Thomas Black Walnut tree is a species of deciduous tree in the walnut family, Juglandaceae, native to North America. It grows mostly in riparian zones, from southern Ontario, west to southeast South Dakota, south to Georgia, northern Florida and southwest to central Texas. The Thomas Black Walnut trees produce edible nuts that are prized for their rich flavor and are used in various culinar applications. (USDA Zones 4-9)