- Botanical Society of America Online Image Collection
Collections include plant geography, morphology, phloem and xylem development, floral ontogeny, lichens, economic botany, and more.
- Checklist of Online Vegetation and Plant Distribution Maps
Includes maps from all over the world.
Explore Botanicus, the web-based encyclopedia of historic botanical literature from the Missouri Botanical Garden Library.
- Virtual Foliage
Image collection of general botany, trees, plant diversity, fungi, and vegetation of Wisconsin.
- Wayne's Word
On-line textbook of natural history by Professor Wayne P. Armstrong of Palomar College. Includes on-line lecture courses in botany and biology, trivia, and photos.
- Plant Biology Advice
Offers information on various aspects of plant biology. Topics range from growing plants in the garden to university level botanical articles, university choice advice, and molecular biology techniques.
Resource for anyone who likes plants, and who wants to learn more about them and the people who discovered them.
- Seed Biology Place, The
Biology lab affiliated with University Freiburg, Germany, presents research on seeds, including plant hormones and seed structure, dormancy, evolution, germination, and ecology.
- Glossary of Botanical Terms
Interactive glossary of terms relating to botany, gardening, horticulture, and landscape architecture.
- VBI Microbial Database
Microbial database at Virginia Bioinformatics Institute (VBI) hosts data from a range of plant pathogenic oomycetes, fungi, and bacteria.
- BOTANY Online: The Internet Hypertextbook
Passing on plant knowledge to students and other interested web-users. Site in English and German, by University of Hamburg, Germany.
- International Tundra Experiment (ITEX)
Field programme monitoring and studying the performance of circumpolar plant species and communities.
- Schroeder Lab - University of California at San Diego
Research focuses on signal transduction mechanisms in higher plant cells.
- Vignettes From the History of Plant Morphology
Religion, mysticism, metaphysics, and science in the work of botanists and plant morphologists Agnes Arber, Edmund Sinnott, and Edith Saunders in the first half of the twentieth century.