Before starting the detailed discussion first I simply answer the first arising question what is author citation? In a sense of Botany, every living being has a unique botanical name by which it is recognized (i.e.Mango=Mangifera indica, Jackfruit=Artocarpus heterophyllus), if it does not have any then it will have sooner or later. These unique names are maintained, by the International Code of Nomenclature for algae, fungi, and plants (ICN). Who first published the name of the organism validly, his or their name also cited besides the botanical name in abbreviated form (i.e.Mango=Mangifera indica L., Jackfruit=Artocarpus heterophyllus Lam.) to make the name complete, accurate and readily verifiable. This naming trend is known as the author citation.
There is a large author’s abbreviated name list but some well-known author names and abbreviated form are given below:
|Joseph Dalton Hooker||Hook.|
|J.D. Hooker||Hook. f.|
|A. P. de Candolle,||DC.|
|Robert Brown,||R. Br.|
|J. P. Lamarck,||Lam.|
|Carl Ludwig von Willdenow||Willd.|
|George Arnott Walker-Arnott||Arn.|
Now, how we cite the name of the author? or what will we do if there are multiple authors? What are the rules for author citation?
In the article 46-50 of ChapterVI of DivisionII(rules and regulations) of ICN, all the norms are point to point described. I will briefly explain these rules but you can check the original one here. let’s go…
Rules for Author citation
It is quite easier to present the author’s name in the case of 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. Areca catechu L.
The names of two or more authors may be associated with a name for a variety of reasons. These different situations are exhibited by citing the name of the authors differently. Such as:
A. Use of et
When two or more authors publish a new species or propose a new name, their names are linked by et.
e.g. Antigonon leptopus Hook. et Arn.
B. Use of parentheses
The rules of botanical nomenclature specify that whenever the name of a taxon is changed by the transfer from one genus to another, or by upgrading or downgrading the level of the taxon, the original epithet should be retained.
The name of the taxon providing the epithet is termed a basionym. The name of the original author or authors whose epithet is being used in the changed name is placed within parentheses, and the author or authors who made the name change outside the parentheses.
e.g. Senna alata (L.) Roxb., based on the basionym Cassia alata L., the original name for the species.
C. Use of ex
The names of two authors are linked by ex when the first author had proposed a name but was validly published only by the second author, the first author failing to satisfy all or some of the requirements of the Code.
e.g. Euphorbia pulcherima Willd. ex Klotz.
D. Use of in
The names of authors are linked using in when the first author published a new species or a name in a publication of another author.
e.g. Carex kashmirensis Clarke in Hook.f. Clarke published this new species in the Flora of British India whose author was Sir J. D. Hooker.
E. Use of emend
Emend comes from the word emendavit which means person making the correction. The names of two authors are linked using emend. when the second author makes some change in the diagnosis or in the circumscription of a taxon without altering the type.
e.g. Phyllanthus Linn. emend. Mull.
That’s for today. If you need more information or have a suggestion then make a comment and let me know.
(Some of the parts of this article is based on the lecture of Dr. Md Oliur Rahman, Professor, Department of Botany, University of Dhaka.
Some info have been added by the author. If any mistake, error, misinformation and other related things found in this article are only author’s to blame)