Botany

Bioversity International - Provides information, publications and news on a range of subjects including agricultural ecosystems, genebanks, germplasm collection, crop wild relatives and neglected and underutilized species.
http://www.bioversityinternational.org/

Botanical Society of America Image Collection - Collection of 14 sets of educational images for instructional use, with search capability.
http://images.botany.org/

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.]
http://www.mpiz-koeln.mpg.de/

Hunt Institute for Botanical Documentation - A division of Carnegie Mellon University. Archives, research, art, and information about the institute are included.
http://huntbot.andrew.cmu.edu

Botanical Publications Database - Database of publications used to verify the entry of publication names in the Harvard Herbaria catalog.
http://asaweb.huh.harvard.edu:8080/databases/publication_index.html

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.
http://www.icrts.org

Botany Encyclopedia - Includes a botanical dictionary, advice for gardeners, and a store selling plants.
http://www.botany.com/

Plant Tissue Culture Information Exchange - Intended to give researchers, teachers and producers rapid access to information about plant tissue culture.
http://aggie-horticulture.tamu.edu/tisscult/tcintro.html

Cladistics or Supercilious? - Textual review of the development of evolutionary trees in botany. Written by Henry Loconte.
http://members.aol.com/__121b_8Az5OGEtpOHzNwRgQIsq+Ik2+3ABJGENQfrswci539U=

Suite101: Botany - Articles on a wide range of plant topics for teachers, students, amateur naturalists and general readers.
http://botany.suite101.com

Green Plant Phylogeny - Green plant phylogeny research coordination group.
http://ucjeps.berkeley.edu/bryolab/greenplantpage.html

Institute for Plant Ecology - Information about research and teaching activities with focus on biodiversity and ecophysiology in different climatic regions, based at the University Münster.
http://www.uni-muenster.de/Biologie/pflanzenoekologie

About.com: Botany - A page of links and articles.
http://botany.about.com/

Botresearch USA - a botanical research and biotechnology organization specializing in tissue culture, photomicroscopy, and the production of educational materials for universities.
http://www.botresearch.com/

Botanical Authors Database - Search the database of authors who contributed to the contents of the catalog of type specimens in the Harvard University Herbaria.
http://asaweb.huh.harvard.edu:8080/databases/botanist_index.html

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.
http://www.gardenweb.com/glossary/

Center for Plant Conservation - Collaborative organization dedicated to conserving and restoring the rare native plants of the United States. Includes information on conservation techniques.
http://www.centerforplantconservation.org/