This home page for the Dendrology program at Virginia Tech is a great resource for those interested in woody plants. In addition to the set of fact sheets on over 450 tree species and fall color photos for many species, the site hosts two useful identification keys. The Leaf Key and Twig Key allow users to identify a tree by viewing online photos and statements, and clicking on the choice that...

Teacher and Gingko enthusiast Cor Kwant, from the Netherlands, offers this comprehensive Web site devoted to Gingko biloba. This frequently updated site covers just about everything there is to know about this "unique tree, a living fossil, unchanged since the time of the dinosaurs." Visitors may read about gingko history, propagation techniques, botanical characteristics, various uses, and much...