There is no known tree species called a "shoemack tree." It's possible that this is a misspelling or a name used in a specific region or context that isn't widely known.

Could you provide more context or information about where you encountered this term? For example:

* Where did you see or hear this term? (Book, movie, conversation, etc.)

* What was the context? (Was it describing a specific tree or its use?)

With more information, we can help you figure out what "shoemack tree" might refer to.