E-Flora BC
- http://www.geog.ubc.ca/~brian/florae/
- Electronic atlas project for the plants of British Columbia, covering life forms from vascular plants to algae, and topics from identification to scientific collections.
Flora brasiliensis
- http://florabrasiliensis.cria.org.br/
- Online version of the series of books produced between 1840 and 1906 by editors Carl Friedrich Philipp von Martius, August Wilhelm Eichler and Ignatz Urban with the participation of 65 specialists. [English and Portuguese versions].
Flora of Europe
- http://utopia.knoware.nl/users/aart/
- Photographic herbarium organized by plant family and genus, with botanical descriptions and photos. Personal project, with about 60 families represented.
Index Nominum Genericorum
- http://ravenel.si.edu/botany/ing/
- A collaborative project of the International Association for Plant Taxonomy and the Smithsonian Institution, providing a compilation of generic names published for all organisms covered by the International Code of Botanical Nomenclature.
National Plant Data Center
- http://npdc.usda.gov/
- Responsible for the PLANTS database, which focuses on the vascular and non-vascular plants of the United States and its territories, including checklists, species abstracts, distribution data, crop information, plants symbols and plant growth data.
PLANTS National Database
- http://plants.usda.gov/
- Online USDA database of information, images, and links on plants in the USA, including crops and invasives. Search by name, geographic distribution, or other characteristics.
Plants For A Future
- http://www.pfaf.org/
- Information about a wide range of edible or otherwise useful plants, sorted by names and potential uses. Includes a searchable database.