Trade Designations
Many plants have "selling names" or "marketing names" as well as a cultivar name; the ICNCP refers to these as "trade designations". Only the cultivar name is governed by the ICNCP. It is required to be unique; in accordance with the principle of priority it will be the first name that is published or that is registered by the discoverer or breeder of the cultivar. Trade designations are not regulated by the ICNCP; they may be different in different countries. Thus the German rose breeder Reimer Kordes registered a white rose in 1958 as the cultivar 'Korbin'. This is sold in the United Kingdom under the selling name "Iceberg", in France as "Fée des Neiges" and in Germany as "Schneewittchen".
Trade designations are not enclosed in single quotes. The ICNCP states that "trade designations must always be distinguished typographically from cultivar, Group and grex epithets." It uses small capitals for this purpose, thus Syringa vulgaris Ludwig Spaeth (trade designation) is distinguished from S. vulgaris 'Andenken an Ludwig Späth' (cultivar name). Other sources, including the Royal Horticultural Society, instead use a different font for selling names, e.g. Rosa Iceberg 'Korbin'.
Read more about this topic: International Code Of Nomenclature For Cultivated Plants
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