American Black Walnut

Juglans nigra, the eastern American black walnut, 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. 
Scientific name: Juglans nigra
Hardness: 1010 
Family: Juglandaceae
Kingdom: Plantae
Order: Fagales