These definitions of nomenclatural terminology were prepared
with the assistance of Dr. Werner Greuter (Chairman, Editorial
Committee for the ICBN). They offer only a general, and much-
simplified, explanation of the categories of unaccepted names.
As such, they are intended for GrainTax users who are unfamiliar
with Greuter International Code of Botanical Nomenclature
[ICBN]. Those users interested in more details about
nomenclatural rules and their legalistic complexities should
consult the ICBN or its web-based version http://www.bgbm.fu-
berlin.de/iapt/nomenclature/code. Illegitimate names are
rejected under ICBN Articles 52 and 53. A name is illegitimate
when (a) it was proposed as a replacement for an earlier name
that should have been adopted or whose epithet should have been
adopted (superfluous names) or (b) the same name had been
published earlier for a different taxon (later homonyms). Names
not validly published are those that did not fulfil all relevant
conditions deemed to apply under the ICBN (Ar