The bark of a black oak tree is smooth in texture, often growing rough with maturity. Black oak leaves are one of the best ways to identify the tree. They are about 3-9 inches long and can vary in ...

Due to its moderately high density, California black oak’s strength and stiffness is high, although slightly weaker than eastern red oaks. For dry wood, the ultimate strength (MOR) is 13,000 psi ...