American Phytopathological Society: International organization that promotes the study and management of plant diseases through journal and book publications, meetings, and electronic resources for students, teachers and researchers

Electronic Sites of Botany, Plant Biology and Science Journals: Links to the electronic sites of major journals publishing articles about plants and plant biology

Index Herbariorum: Global directory of public herbaria and staff, presented by the New York Botanical Garden. Searchable database, listing contact information, important holdings, approximate size, and staff for each facility

Photosynthesis Education: List of educational photosynthesis sites, includes links on the history of photosynthesis research and researchers

Plant Physiology Online: An online companion to "Plant Physiology, Third Edition" by Lincoln Taiz and Eduardo Zeiger. Includes Essays, Topics in Plant Physiology, Study Questions and Further Readings