Free plant identification application determines plant and tree species through leaf photographs.
Easy-to-use tree identification online tool. Identifies a tree by searching for attributes and common names in a number of languages.
Simplified guide to identifying fifty common Native North American trees. Also offers a beginner tree identification e-course.
Definition of a tree and details on identifying trees through a number of means. Also includes information on tree evolution, benefits, and problems.
Database on identifying woody landscape plants. Includes data on native and introduced species.
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