The dendrology Web pages at Virginia Tech offer "tree identification fact sheets on approximately 800 species of trees, as well as lots of other tree information." The Web site featured here includes two resources that dendrology students should find especially useful. This Web site contains two easy-to-use dichotomous keys (a leaf key and a twig key) with photographs, while also linking to...

This straightforward tutorial on leaf identification comes from the Department of Horticulture at Penn State University. Simple diagrams, helpful photos, and clear explanations make short work of learning the basics of leaf identification. The website even includes a section on why anyone should bother learning this skill (i.e. it's not just for dedicated horticulturists and botanists). The...