Botany
- 122
- Identify America’s Common Trees
- Provides quick identification of 100 common conifer and evergreen trees of the North American forest using a tree finder key, photographs and other features.
- 124
- Trees of London
- Tree identification using examples of trees located in London. Illustrated with photographs of trees, bark, flowers, fruit and leaves.
- 125
- Dendrology at Virginia Tech
- Includes ID keys and fact sheets on over 900 species of wild and cultivated trees in North America.
- 126
- Fact Sheets for 680 Trees
- Descriptions, illustrations, US range maps and cultivation of species from around the world.
- 129
- Taxonomy of Woody Plants
- Links on woody plant taxonomy including original identification keys to major genera.
- 130
- Tree-Identification.com
- Provides information about the general identification of trees as well as more specific techniques for a limited number of species. Includes information about dendrology.
- 133
- British Society for Plant Pathology
- Founded for the study and advancement of plant pathology. Publishes several journals and disease reports.
- 134
- European Foundation for Plant Pathology
- Promotes scientific and technical cooperation in plant health in Europe and facilitates the exchange of information between pathologists who are members of national or regional societies.
- 135
- International Society of Plant Pathology
- Worldwide organization supporting the development and dissemination of knowledge about plant diseases and management. Includes links to national, regional and international associated societies.
- 136
- New Zealand Plant Protection Society
- Professional society researching and publishing biology, ecology and control of weeds, pests, pathogens and beneficial organisms in agriculture, horticulture, forestry and natural ecosystems.
- 137
- Phytopathological Society of Japan
- Promotes the increase and diffusion of knowledge relating to plant diseases and their control. Includes abstracts of the societies' journal, membership information, details of local and international meetings, and relevant links.