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International Code Of Botanical Nomenclature
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  • 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 . Many type collections can be viewed online at the website of the herbarium in question.


Both these principles are regulated and limited. To avoid undesirable effects of priority Conservation of a name is possible. Above the rank of 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 Taxonomy providing the supporting infrastructure. The present edition is the ''St Louis Code'' (2000), available online. This is based on the decisions of the XVI IBC at St. Louis 1999 . It was preceded by the ''Tokyo Code'' (1994), which is also available online. Following the XVII IBC in Vienna in 2005 , the ''Vienna Code'' (2006) will be published. Each new edition supersedes the earlier editions and is retroactive back to 1753 (except where expressly limited).


SCOPE

The ICBN applies to all organisms traditionally treated as Plant s, whether Fossil or non-fossil, e.g., blue-green algae ( Cyanobacteria ); Fungi , including Chytrid s, Oomycete s, and Slime Mould s; Photosynthetic Protists and Taxonomically related non-photosynthetic groups. The supplementary International Code Of Nomenclature For Cultivated Plants governs the formal names of cultivated plants.

Botanical nomenclature is independent of zoological and bacteriological nomenclature, which are governed by their own Codes (see Nomenclature Codes ).


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