General Taxonomic and Nomenclatural Resources

Flora of North America: A multi-volume, collaborative floristic work by North American botanists. Volumes completed as of December 2003 include Vol. 1 (Introduction), Vol. 2 (Pteridophytes and Gymnosperms), Vol. 3 ( Magnoliophyta: Magnoliidae and Hamamelidae), Vol. 22 (Magnoliophyta: Alismatidae, Arecidae, Commelinidae (in part), and Zingiberidae), Vol. 23 (Magnoliophyta: Commelinidae (in part): Cyperaceae), Vol. 25 (Magnoliophyta: Commelinidae, Poaceae, part 2), Vol. 26 (Magnoliophyta: Liliidae: Liliales and Orchidales).
GRIN Database: The Germplasm Resources Information Network (GRIN). The GRIN database presents a frequently updated online version of J.H. Wiersema & Blanca León. 1994. Taxonomic Information on Cultivated Plants in the USDA- ARS Germplasm Resources Information Network (GRIN). USDA, ARS, National Genetic Resources Program. Germplasm Resources Information Network. National Germplasm Resources Laboratory, Beltsville, Maryland. This is a particularly valuable resource for information on cultivated and introduced species in North America.
IPNI: International Plant Name Index. A collaborative work by The Royal Botanic Garden, Kew (Great Britain), The Harvard University Herbaria, and the Australian National Herbarium. This website includes separate search pages for plant names, authors, or publications.
W³-Tropicos: The W³-TROPICOS website provides access to the Missouri Botanical Garden's VAST (VAScular Tropicos) nomenclatural database and associated authority files. Each species includes synonyms and infraspecific species.
Index Synonymique de la Flore de France: This online taxonomic database of the Flora of France, compiled by Michel Kerguélen, includes about 62 000 taxa found in France. This database is an excellent source for synonyms of European introductions and cultivated plants.
Flora Europaea: This online taxonomic database of Flora Europaea presents a large portion of the PANDORA taxonomic data base system at the Royal Botanic Garden Edinburgh, Scotland.

Resources for Specific Taxa

Taxonomic Data from the World Umbellifer Database: This online database provides taxonomic information on members of the Apiaceae and Araliaceae. See Watson (1999). Nomenclature Search
Knapweeds (Centaurea L.) in North America: This resources provides taxonomic information, photographs, and references for the Centaurea species (Asteraceae) in North America.
Neotropical Blueberries: The Plant Family Ericaceae: See Luteyn (2002).
Classification of Salix in the New World: See Argus (1999).

Database of Botanical Authors

Index of Botanists: This database, maintained by the Harvard University Herbaria, includes the names of botanists who have authored plant names or published botanical treatments. The Northern Ontario Plant Database follows the official author abbrevations, as defined in Brummitt and Powell's Authors of Plant Names (1992).

Nomenclature Rules (ICBN)

The International Code of Botanical Nomenclature (St. Louis Code): Adopted by the XVI International Botanical Congress, St. Louis, Missouri, July-August 1999.