- International Code of Botanical Nomenclature
The "International Code of Botanical Nomenclature" ("ICBN") is the set of rules and recommendations dealing with the formal
botanical names that are given to plants. Its intent is that each taxonomic group (" taxon", plural "taxa") of plants has only one correct name that is accepted worldwide. The value of a scientific name is that it is an identifier; it is not necessarily of descriptive value, or even accurate.
* The guiding principle in
botanical nomenclatureis priority. The "ICBN" sets the formal starting date of plant nomenclature at 1 May 1753, the publication of " Species Plantarum" by Linnaeus (or at later dates for specified groups and ranks).
* A botanical name is fixed to a taxon by a type. This is almost invariably dried plant material and is usually deposited and preserved in a
herbarium, though can be an image. Some type collections can be viewed online at the websites of the herbaria in question.
Both these principles are regulated and limited. To avoid undesirable effects of priority, conservation of a name is possible. Above the
taxonomic rankof family very few hard rules apply (e.g. see descriptive botanical names).
The "ICBN" can only be changed by an
International Botanical Congress(IBC), with the International Association for Plant Taxonomyproviding the supporting infrastructure. The present edition is the "Vienna Code" (2006), based on the decisions of the XVII IBC at Vienna 2005. This was preceded by the "St Louis Code" (2000) and the "Tokyo Code" (1994), both available online. Each new edition supersedes the earlier editions and is retroactiveback to 1753, except where expressly limited.
Botanical nomenclature is independent of zoological and bacteriological nomenclature, which are governed by their own Codes (see
The "ICBN" applies not only to plants, as they are now defined, but also to other organisms traditionally studied by botanists. This includes blue-green algae (
Cyanobacteria); fungi, including chytrids, oomycetes, and slime moulds; photosynthetic protistsand taxonomically related non-photosynthetic groups. There are special provisions in the "ICBN" for some of these groups, as there are for fossils.
For the naming of cultivated plants there is a separate code, the "
International Code of Nomenclature for Cultivated Plants". This gives supplementary rules and recommendations.
International Code of Zoological Nomenclature
Author citation (botany)
* " [http://www.bgbm.fu-berlin.de/iapt/nomenclature/code/tokyo-e Tokyo Code] " (1994)
* " [http://www.bgbm.fu-berlin.de/iapt/nomenclature/code/SaintLouis/0000St.Luistitle.htm St. Louis Code] " (2000)
* " [http://ibot.sav.sk/icbn/main.htm Vienna Code] " (2006)
* [pdf file]
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