Botanical Nomenclature Professor Sanjay Kumar Datta Govt

Home , Author citation (botany), Botanical nomenclature, Correct name, Phyllanthus

COMPILED AND CIRCULATED BY PROFESSOR SANJAY KUMAR DATTA, GOVT. APPROVED PART TIME TEACHER, DEPARTMENT OF BOTANY, NARAJOLE RAJ COLLEGE

BOTANICAL NOMENCLATURE PROFESSOR SANJAY KUMAR DATTA GOVT. APPROVED PART TIME TEACHER DEPT. OF BOTANY NARAJOLE RAJ COLLEGE

BOTANY: SEM-II, GE2T: PLANT ECOLOGY AND TAXONOMY, UNIT-6: INTRODUCTION TO PLANT TAXONOMY. COMPILED AND CIRCULATED BY PROFESSOR SANJAY KUMAR DATTA, GOVT. APPROVED PART TIME TEACHER, DEPARTMENT OF BOTANY, NARAJOLE RAJ COLLEGE

CONTENTS

 BOTANICAL NOMENCLATURE

 AUTHOR CITATION

 VALID PUBLICATION

 REJECTION OF NAMES

BOTANICAL NOMENCLATURE

1. Botanical nomenclature is the naming of plants and the related principles and rules.

2. Principle and rules of botanical nomenclature are developed and adopted in series of international botanical Congress.

3. Principles and rules are listed in international code of botanical nomenclature (ICBN)

4. The main goal of ICBN is to provide are correct name for each taxonomic group within a stable system of names or classification.

AUTHOR CITATION

 For a name to be complete, accurate and readily verifiable, it should be accompanied by the name of the author or author who first validly published the name. The names of authors are commonly abbreviated.

 e.g. Mangifera indica L. (L stands for Linnaeus)  Single author:- The name of a single author follows the name of a species (or any other taxon) when a single author proposed a new name.

 e.g. Solanum nigrum Linn.  Multiple authors:-

1. Use of et:-when two or more author jointly published the name of a new species their name are linked by et. e.g. Delphinium viscosum Hook. f. Et Thomson.

 Use of parenthesis:- when the name of a taxon is based basionym, the name of the author of basionym is placed within parenthesis and the author who made the name, is placed outside the parenthesis. e.g. Cynodon dactylon (Linn) pers  Use of ex:- when a author had proposed a name but was validly published by another author, the word ex should be used as connecting link between the name of authors. e.g. Cerasus cornuta wall. Ex Royle  Use of in:- The names of author are linked using in when a author published a name in a publication of another author. e.g. Carex kashmirensis Clarke in Hook. F.

 Use of emend:- The names of two authors are linked using emend when the second author makes some change in the diagnosis or in circumscription of taxon without altering the type. e.g. Phyllanthus Linn. Emend Mull  Use of square brackets:-Square brackets are used to indicate prestarting point author. e.g. Lupinus [Tourne.] Linn

VALID PUBLICATION

 A set of rules in biological nomenclature that regulates whether the name of a taxon can be accepted in order to be valid a taxon name must be effectively published accompanied by a description or diagnosis and comply with several other provisions of the relevant code.

 Valid publication is a publication that is accordance with the rules:-

 Have a Latin diagnosis or description

 Give a clear indication of rank

 Designate a type and it’s location

 Publish in a scientific formula

 Follow the rules of nomenclature according to the most recent code.

REJECTION OF NAMES

 Tautonym:-An illegitimate binomial in which the name of genus and specific epithet is identical or some is called a tautonym. e.g. Malus malus or Armoracia (L) Britron. Cajanus cajan – not tautonym

 Autonym:- Reputation of a specific epithet is an intra specific epithet does not constitute a tautonym but a legitimate autonym. e.g. Acacia nilotica ssp. Nilotica.

 Synonym:- All names of a taxon other than a single valid name are synonyms of that taxon. The earliest name is the current name and others are synonyms. The earliest is detected by low of priority from 1753. e.g. Nymphaea nouchali Burm. f, 1768 Nymphaea pubescence Willd, 1799 –Synonym Nymphaea torus Hook. f. Et T., 1872 –Synonym

 Basionym:- A specific or intraspecific name which has priority and is retained deeded when transferred to a new taxon is called a basionym. e.g. Panicum dactylon Linn—basionym. Cynodon dactylon (Linn) pers—Original name.  Homonym:- A taxon should have one correct name. The code does not allow the same to be used for two different taxa. Such if existing constitute homonyms. The name published at an early date is termed the earlier homonym. The name rejects the later homonym. E.g:- Zizyphus jujuba Lamk 1789— later homonym Zizyphus jujuba Mill 1768—earlier homonym.  Later Isonym:- When the same based on the same type has been published independently at different times by different authors, then only the earliest of these so called “Isonym” has nomenclatural status and “later Isonym” rejected. e.g:- Alsophila kalbreyeri Baker(1892) Alsophila kalbreyeri Christensten(1905) –later Isonym.

THANK YOU

BOTANY: SEM-II, GE2T: PLANT ECOLOGY AND TAXONOMY, UNIT-6: INTRODUCTION TO PLANT TAXONOMY.