Photographs and information on over 160 species, identification key, and full species lists for two counties.

Species accounts with images and maps, arranged by scientific name, tanomomy, and common name. In English and Spanish.

A site that covers common conifers only. Uses an interactive web based dichotomous key.

Names and illustrations of Japanese trees.

Descriptions and images of over 70 species.

Glossary of tree-related terms; articles on California trees, hiking, and meditation.

Searchable database of notable UK trees. Tree quotes, news, photo galleries, and forums.

A page on the common trees of Michigan with a key.

An interactive guide to trees, using a simple visual dichotomous key.

Guide to common trees with laymans descriptions of each tree, and a simple key to start with. Line drawings of leaves and fruit.