Same plants as well as animals have different names in different countries as well as within the country. Eg. apple in english,seb in hindi is the name of same fruit in different languages. This creates problem because if we speak the common hindi name of parrot in Tamilnadu they will not understand what we are talking about. These difficilties urged biologists to name plants and animals according to binomial nomenclature.
In binomial nomenclature there is a generic name and a specific name. First letter of generic name is written in capital while specific name is wtitten in small. Generic and specific name should be seperately underlined if handwritten and italicized when typed.All the name should be in Latin.
Common names vary in different languages, countries, areas etc. so a common name might not be recognisable to everyone (even if it seems obvious), whereas a scientific name is universal. The scientific name also gives clues as to genus and other factors. It is also just considered more professional and makes you come across as more scientific, professional and knowledgeable.
To use common name is not sufficient because its vary from region to region , country to country even language to language.Common name is not valid throughout the world .
e.g: In Pakistan Alleum cepa is known as piaz ,gandha and many other common name in different region but this Alleum cepa in other country is known by different common name .
So, it is very difficult to recognize for native of one country to other country some thing .That why scientific names are given to common name which is valid through out the world.
because there is many common names to the plants in different country. some cases the plant species has many common names in the different regions of the same country. Whereas there is one scientific name for each plant or animal. for example it can called wheat, grist, flour , Kamh etc…
Common name varies from one place to other place. For example, in India, dog is called by using different common names in different languages. Like Kutha in Hindi, Kukka in Telugu, Naayi in Kannada, Patti in Malayalam.
If a person in India writes a research article on dog by using its common name, how can a person reading it in England can understand. If we use a scientific name all over the world, like dog’s scientific name is Canis lupus, anyone can understand.
Common name system has a lot of problems and confusions, because the name used in one part of the world is not understood by any person from other part.
As common name for apple in kashmiri is’chount’ in pakistan it is called ‘saib’ and so is the other parts of country and so by the many parts of world.
So un order to compensate the system a world wide union came into existance in order to facilitate the system of nomenclature. And so all the world would mean the particular name to particular thing.