Es gibt -offline- gerade eine Diskussion über die Benennung von Cultivaren.
Die Namensvergabe regelt der ICNCP, der kürzlich in der 7. Version erschienen ist - allerdings nur in englisch. Da es einige deutsche Züchter gibt, die der englischen Sprache nicht mächtig sind, wollte ich mich daran machen, eine Seite mit allgemeinen Hinweisen dazu aus dem Englischen ins Deutsche zu übertragen. Hat jemand Lust daran mitzutun, ich starte heute Nacht damit. Hier kommt schon mal der englische Text:

How to name a new cultivar

Many of the Rules in the International Code of Nomenclature for Cultivated Plants (Cultivated Plant Code or ICNCP) deal with sorting out problems which have arisen in past nomenclature. The following short notes are intended as a quick guide to forming new cultivar names and should be read by anyone wishing to name a new cultivar. For precise regulations, the ICNCP is to be consulted.
DO I HAVE A NEW CULTIVAR?
You have a new cultivar and you wish to name it. First check that you do actually have a cultivar. A single plant is not a cultivar: a cultivar is a group of individual plants which collectively is distinct from any other, which is uniform in its overall appearance and which remains stable in its attributes. Do not attempt to name a cultivar until you have a number of individuals that are uniform and stable. Now convince yourself that your cultivar is really worth naming; there is no point in going through the process of naming your cultivar if it is not an improvement on others.
There are different sorts of cultivar ranging from clones, which should be genetically identical, to tightly controlled seed-raised cultivars such as F1 hybrids. Article 2 of the Code describes some of the different kinds of cultivar.
The only way you can check if your cultivar is new and distinct is by comparing it with existing cultivars. Your new cultivar must be distinguishable from others that exist or have existed.
Once you are satisfied that you do indeed have a new cultivar, decide if you want to give it a cultivar name. A name is made up of a botanical name in Latin (or its common-name equivalent) for a genus or species followed by a cultivar epithet which is the last part of the entire name and which renders the name unique. Cultivar epithets are always written within single quotation marks (never double quotation marks) so that they stand out from the rest of the name and so that their status is obvious.
Remember that cultivar names, by their very definition, are available for all to use and that the names themselves offer no protection if you wish to obtain intellectual property rights on your new cultivar.
HOW DO I FORM A NEW CULTIVAR NAME?
The full name of a cultivar will always begin with the name of the genus to which the cultivar belongs. Optionally, the species or hybrid epithet may be included as a second element in the entire name but this is not usually necessary; inclusion of such epithets merely provides more information about your cultivar.
Since 1959, new cultivar epithets must be in a language other than Latin and they must be unique within the so-called denomination class which is usually the genus. A few groups have special denomination classes and these may be found listed in Appendix III of the Code.
Coining a new and original cultivar name is not easy, especially in groups which historically have had hundreds or even thousands of cultivars. Luckily many of these groups have International Cultivar Registration Authorities (ICRAs) who publish checklists and registers of names which are in use or which have been used in the past. You can search in the alphabetic list of genera in these pages to see if the genus of your cultivar is covered by an ICRA and then consult the ICRA's publications or contact the particular ICRA Registrar directly. Registrars will be glad to advise you if your proposed name has been used before and whether or not your name is in an acceptable form.
There have been many other lists of cultivar epithets produced in the past and a fairly comprehensive list of those is given in Appendix XI of the 1995 edition of the Code. This list of Checklists is kept up to date at Delaware State University (USA). Good horticultural and botanical libraries are likely to have copies of many checklists, registers, and other publications for you to check through prior to publishing your proposed name.
Thinking up a cultivar epithet requires a bit of care. An ideal epithet is both easy to spell and pronounce in the various countries through which the cultivar might be distributed. The rules for forming an epithet allow you to use or make up any word or words you want but the epithet will not be allowed as a cultivar epithet if it is confusing or likely to confuse or if it is contrary to the few provisions listed below. The Code governs the reasons why a proposed epithet might not be allowed: epithets not formed in accordance with the Code are to be "rejected".
1. The following are some of the Rules to follow when formulating a new name:
(a) Make sure your proposed name is unique and that the epithet is in a modern language other than Latin. (ICNCP Art. 19.13-19.14)
(b) Make sure that your name cannot be confused either in spelling or pronunciation with an existing one. (ICNCP Art. 19.15)
(c) Make sure that your name could not be interpreted as being likely to exaggerate the merits of the cultivar. (Art. 19.26)
(d) Make sure that the epithet of your name has no more than 10 syllables and no more than 30 characters, excluding spaces and the single quotation marks. (ICNCP Art. 19.15)
(e) Make sure your epithet does not consist of a single letter or solely of numerals (ICNCP Art. 19.16)
(f) Do not use any of the following banned words (or their equivalents in any language) in your epithet: "cultivar", "grex", "group", "hybrid", "maintenance", "mixture", "selection", "series", "sport", "strain", "variety" (or the plural form of these words in any language) or the words "improved" or "transformed". (ICNCP Art. 19.19-19.20)
(g) Do not use any punctuation marks except for the apostrophe, the comma, a single exclamation mark, the hyphen and the full-stop (period). Do not use fractions or symbols unless they are specifically permitted. (ICNCP Art. 19.21-19.22)
(h) Make sure that your epithet is not, or does not contain, the Latin or common name of its genus or the common name of any species in that genus if use of such might lead to confusion. (ICNCP Art. 19.23-19.24)
(i) Make sure that publication of the cultivar’s name is not against the wishes of its raiser or breeder. (ICNCP Art. 28.4)
Quelle: http://www.ishs.org/sci/icraname.htm

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