Organization seeks to identify, preserve, and protect trees that stand as living witnesses to American historical events and personages.

Encyclopedia entry describes the characteristics of this group of widely distributed trees distinguished by seed-bearing cones.

Identify tree illnesses and blights. Details water and temperature stresses, mechanical injuries, and soil and root problems.

Get details about tree improvement and research, forest conservation and molecular forest genetics.

Review the different species and plants from this floral kingdom in the Cape Peninsula of South Africa.

Pest and disease information on deciduous fruit trees especially in the mid-Atlantic region. Updated monthly and includes a search function.

Encyclopedia offers an article on trees. Also find information about its premium resources and browse links to related topics.

Resource provides an article about wood and furnishes links to related topics and its premium resources on the subject.

Plants by Mail presents the much talked about Encore Azaleas and other exciting, new landscape plants for the 21st Century landscape.

Find fact sheets for over 450 species of trees, browse leaf and twig identification keys, or ask Dr. Dendro a question about trees.

Acquire a green thumb with this tree and shrub care guide that details disease prevention and insect removal. Get advice on specific species.

Tree guide provides details on the life cycle and usefulness of trees. Learn how these plants survive ice storms and how people protect them.