[5] William Stearn has outlined the origins of ICNCP, tracing it back to the International Horticultural Congress of Brussels in 1864, when a letter from Alphonse de Candolle to Edouard Morren was tabled.
When they can be traced back to a botanical species, subspecies or variety, this is indicated by a sequence of names (Pelargonium zonale Mistress-Pollock).
[a]This Article survived redrafting of the International Rules of Botanical Nomenclature until 1935 and its core sentiments remain in the present-day ICNCP of 2009.
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.
This is sold in the United Kingdom under the selling name "Iceberg", in France as "Fée des Neiges" and in Germany as "Schneewittchen".
The ICNCP states that "trade designations must always be distinguished typographically from cultivar, Group and grex epithets.