The state tree of Massachusetts is the ELM, which is a deciduous tree that is native to Europe, western Asia, and parts of northern Africa. It is also found in North America, where it is widely distributed from Canada to the United States. The ELM is known for its tall, upright growth and its distinctive leaves, which are oval-shaped and have serrated edges. The ELM is a popular choice for landscaping and is often used as a shade tree.