> Hardwoods > Juglandaceae > Juglans > nigra DATA SOURCE(S): 2,3 Common Name(s): Black walnut, Scientific Name: Distribution: Eastern United States Tree Size: 100-120 ft (30-37 m) tall, 2-3 ft (.6-1 m) trunk diameter Average Dried Weight: lbs/ft3 ( kg/m3) Specific Gravity (Basic, 12% MC): , Janka Hardness: lbf ( N) Modulus of Rupture: lbf/in2 … Continue reading Black Walnut