International Poplar Commission
Phases of the nomenclature process
Nomenclature is normally based on precedence of publication. Each cultivar can bear only one accepted epithet, generally the earliest published that is in accordance with the rules of the Cultivated Plant Code. Here follows the natural order of the nomenclatural process for fixing epithets:
a) appear in a dated publication;
b) conform to the spelling rules of the Cultivated Plant Code;
c) be accompanied by a description or diagnosis or by a reference to a previously published description or diagnosis;
d) be accepted by the author who publishes it;
e) correspond to an existing cultivar (no reserved names).
A cultivar epithet is not established against the expressed wish of its originator, unless the originator (or his assignee) has already knowingly distributed the cultivar without a proposed cultivar epithet. Herbarium or living material should be sent to ICRA or to a public herbarium specialized in the collection and maintenance of standard portfolios. The date for the establishment of precedence is that of establishment, not that of publication.