Binomial nomenclatureisimportantbecause In this, each organism given a name containing genus and species which is constant all over the world. It is easy to identify and describe any organism by this name without any confusion. e.g, Mangifera indica is scientific name which is constant in all over world.

Binomial names areuniversally accepted. Theyavoid confusionas each plant has only one binomial name.

These names arescientific, precise and avoid repetition.

These names aresimple and meaningful.

Binomial nomenclatureindicates relationships.

Binomial nomenclature("two-term naming system"), also calledbinominal nomenclature("two-name naming system") orbinary nomenclature, is a formal system of namingspeciesof living things by giving each a name composed of two parts, both of which useLatin grammatical forms, although they can be based on words from other languages. Such a name is called abinomial name(which may be shortened to just "binomial"), abinomen,binominal nameor ascientific name; more informally it is also called aLatin name.

The first part of the name – thegeneric name– identifies thegenusto which the species belongs, while the second part – thespecific nameorspecific epithet– identifies the species within the genus. For example, humans belong to the genusHomoand within this genus to the speciesHomo sapiens.Tyrannosaurus rexis probably the most widely known binomial.[1]Theformalintroduction of this system of naming species is credited toCarl Linnaeus, effectively beginning with his workSpecies Plantarumin 1753.[2]ButGaspard Bauhin, in as early as 1622, had introduced in his bookPinax theatri botanici(English,Illustrated exposition of plants) many names of genera that were later adopted by Linnaeus.[3]

The application of binomial nomenclature is now governed by various internationally agreed codes of rules, of which the two most important are theInternational Code of Zoological Nomenclature(ICZN) for animals and theInternational Code of Nomenclature for algae, fungi, and plants(ICNafp). Although the general principles underlying binomial nomenclature are common to these two codes, there are some differences, both in the terminology they use and in their precise rules.

In modern usage, the first letter of the first part of the name, the genus, is always capitalized in writing, while that of the second part is not, even when derived from aproper nounsuch as the name of a person or place. Similarly, both parts are italicized when a binomial name occurs in normal text (or underlined in handwriting). Thus the binomial name of the annual phlox (named after botanistThomas Drummond) is now written asPhlox drummondii.

In scientific works, theauthorityfor a binomial name is usually given, at least when it is first mentioned, and the date of publication may be specified.

Inzoology"Patella vulgataLinnaeus, 1758". The name "Linnaeus" tells the reader who it was that first published a description and name for this species of limpet; 1758 is the date of the publication in which the original description can be found (in this case the 10th edition of the bookSystema Naturae)."Passer domesticus(Linnaeus, 1758)". The original name given by Linnaeus wasFringilla domestica; the parentheses indicate that the species is now considered to belong in a different genus. The ICZN does not require that the name of the person who changed the genus be given, nor the date on which the change was made, although nomenclatorial catalogs usually include such information.Inbotany"Amaranthus retroflexusL."– "L." is the standard abbreviation used in botany for "Linnaeus"."Hyacinthoides italica(L.) Rothm."– Linnaeus first named this bluebell speciesScilla italica; Rothmaler transferred it to the genusHyacinthoides; theICNafpdoes not require that the dates of either publication be specified.