Tree identification

What's the easiest way to identify a tree? A dichotomous key of course. A dichotomous key is a tool that allows anyone to determine the identity of items in the natural world such as wildflowers, mammals, reptiles, rocks, fish, and trees. Dichotomous means "dividing into two parts" so the dichotomous keys below will always give only two choices for each step until you have identified the tree.

Dichotomous tree keys

• Online Tree ID key, UW-Stevens Point LEAF
• Online Key to the Trees of Wisconsin, UW-Green Bay

Tree and plant identification guides

• Forest Trees of Wisconsin: How to Know Them - A paper copy of the guide is also available for order on Education Connection.
• Wisconsin Urban Tree Key – A guide to the most common urban trees in Wisconsin.
• What Tree is That? – A tree identification guide developed by the Arbor Day Foundation.

Plant a tree!

• Looking guidance from a forester? Search the Forestry Assistance Locator.
• Find out how to order tree seedlings.
• Discover Arbor Day celebration ideas (or visit the Arbor Day Foundation).