- British Trees
 - Forestry and conservation with an emphasis on British native tree species. Includes lists of commercial and noncommercial organisations, bibliograpy and a tree guide. - Tree Register, The
- Unique record of ancient, historical, and the largest trees in Great Britain and Ireland.
- American Conifer Society
- Mission, purpose, resources, and information.
- Palm and Cycad Societies of Australia
- PACSOA features technical and non-technical articles of interest to palm and cycad enthusiasts.
- European Palm Society
- Organisation dedicated to the sharing of information about palms and other exotic plants across the continent of Europe.
- Common Trees of Pennsylvania
- Identification information.
- Trees New York
- Provides information on their programmes, services, and urban forestry as well as providing a databank of reference materials.
- Key to Leaves of Virginia Trees
- Interactive photographic key to identifying Virginia trees.
- Saskatchewan Dutch Elm Disease Association
- Working to preserve the American Elm in Saskatchewan.
- Trees and Shrubs of Ontario
- Species list, descriptions, and photographs.
- Dendrology at Virginia Tech
- Offers a fact sheet for woody plants found in the United States, an ask an expert service, course information, and more.
- Eucalyptus of California: Seeds of Good, or Seeds of Evil?
- Examines the story of this amazing tree and its impact on California.
- Palm Society of South Texas
- Elm Watch
- Encouraging the protection of New England's historic and scenic American Elms from Dutch elm disease (DED).
- Trees of the Pacific Northwest
- Tree identification home page at Oregon State University.
- Conifers, The
- Ornamental information from the University of Alabama in Huntsville.
- Trees and Shrubs of Western Colorado: Problems and Care
- Discussion of tree and shrub care and specific insect and disease problems, with photographs.
- Identification of Common Trees of Iowa: An Interactive Key
- Interactive key to aid in identifying the most common trees in Iowa. Includes information on leaves, fruits, and bark.
- Growing Citrus in the UK
- Offers tips on compost, watering, and feeding.
- Palm Trees in Oregon
- Explores growing palms in the temperate Pacific Northwest.
- Red Gum Lerp Psyllid
- Describes University of California biological control work addressing this new insect invader attacking red gum eucalyptus trees throughout the state.
- Australian National Botanic Gardens: Australian Conifers
- Lists native species.
|
