Cultivated Plants
The ICN does not regulate the names of cultivated varieties of plants (cultivars), i.e. varieties of plants specifically created for use in agriculture or horticulture. Such names are regulated by the International Code of Nomenclature for Cultivated Plants (ICNCP). A cultivar name may be attached to any scientific name at the genus level or below and so may be below the rank of species (and hence "infraspecific" in the widest sense of the term). For example, Pinus nigra 'Arnold Sentinel' is a cultivar of the species P. nigra which is particularly upright and is propagated vegetatively so that all plants of this cultivar have the same habit.
Read more about this topic: Infraspecific Name (botany)
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