Post oak is known to be a hardwood tree species primarily found in North America. However, the tree is popularly known by other synonyms names such as Iron oak, Cross oak, and Box-leaved oak. Its dense, strong wood and resistance to decay make it a valuable resource for building and manufacturing. The unique bark of the post oak is rough, thick, and blocky. The tough acorns produced by the post oak tree is a valuable food source for many animals. In conclusion, post oak, iron oak, cross oak, or box-leaved oak is an important and useful hardwood tree in North America.