The oak tree was designated as the national tree of the United States of America in November 2004. It is considered as a symbol of strength and endurance.

Each state has its own state tree, flower, or bird. These are designated by legislation. Sometimes, politics are involved, while in case of others, the citizens or children choose by voting. Sugar maple is the most popular tree, as it is the state tree of four states: New York, West Virginia, Wisconsin, and Vermont.

All the state trees are native to its state, except Hawaii. Hawaii's state tree, the candlenut tree, was brought to the island by the first people. California and Nevada have two different species as their official trees. Here's a list of the state trees of all the 50 states of the United States.