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Tree Identification Using a Tree Leaf Key

A Quick and Easy Way to Identify 50 Common North American Trees

By Steve Nix, About.com

Find a tree in the forest, collect a leaf or needle and answer the following questions. At the end of this interview you should be able to identify a tree's name at least to the genus level. I am confident you can also select the species with a little research.

One caveat here. The tree you are trying to identify should be a North American native tree as defined by Forest Types of the United States.

If you have a dormant tree in winter, review my Winter Tree Finder with twig keys. You can also use the species botanical markers in the guide if your leaf is not helping you in determining the tree species.

1. Trees With Needles

Trees With Needles
Does your conifer have an evergreen leaf that looks like needles? If so, continue to trees with needles.

2. Trees With Scale-like Leaves

Trees With Scale-like Leaves
Does your tree have an evergreen, scale-like leaf? If so, continue to cedars and junipers.

3. Trees With Leaves

Trees With Leaves
Does your tree have a typical leaf that includes a leaf stalk, veins and a midrib? If so, continue to trees with simple and compound leaves.

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