Glossary of Botanical Terms - Contains more than 2,500 terms relating to botany, gardening, horticulture and landscape architecture. Fully searchable and it is regularly updated.
Botresearch USA - a botanical research and biotechnology organization specializing in tissue culture, photomicroscopy, and the production of educational materials for universities.
Max Planck Institute for Plant Breeding Research - Conducts research programs on molecular-biological, genetical, biochemical, physiological and cytological aspects of plant development and plant breeding. [English and German versions available.]
Hunt Institute for Botanical Documentation - A division of Carnegie Mellon University. Archives, research, art, and information about the institute are included.
Green Plant Phylogeny - Green plant phylogeny research coordination group.
Plant Tissue Culture Information Exchange - Intended to give researchers, teachers and producers rapid access to information about plant tissue culture.
International Centre for Research and Training on Seabuckthorn - Information on the biology of this plant and its uses for environmental, economic, nutritional, and medical purposes; emphasizing erosion control.
Botany Encyclopedia - Includes a botanical dictionary, advice for gardeners, and a store selling plants.
International Plant Genetic Resources Institute - Contains information on IPGRI, resources, and press releases.
Botanical Authors Database - Search the database of authors who contributed to the contents of the catalog of type specimens in the Harvard University Herbaria.
Botanical Publications Database - Database of publications used to verify the entry of publication names in the Harvard Herbaria catalog.
Botanical Society of America Image Collection - Collection of 14 sets of educational images for instructional use, with search capability.
About.com: Botany - A page of links and articles.
Root Biology and Mycorrhiza Research Group - Descriptions of current research projects at the Department of Botany, University of Guelph, Ontario, Canada.
Center for Plant Conservation - Collaborative organization dedicated to conserving and restoring the rare native plants of the United States. Includes information on conservation techniques.
Cladistics or Supercilious? - Textual review of the development of evolutionary trees in botany. Written by Henry Loconte.