The international code governing plant nomenclature is
Global plant nomenclature is now governed by International Code of Nomenclature for algae, fungi, and plants abbreviated ICN, previously called ICBN International Code of Botanical Nomenclature until Melbourne Congress 2011 renamed it to include algae and fungi. ICN regulates valid publication, legitimacy, priority, typification, and rejection of names, ensuring one taxon bears one correct name. Separate codes exist for animals ICZN, prokaryotes ICSP, viruses ICVCN. Understanding which code applies to which kingdom is essential for answering taxonomy questions accurately. Field identification relies on this character, making it essential for wildlife surveys and protected area management protocols.
Ref: ICN Melbourne Code 2011 Preface; Campbell Biology Appendix Codes ICBN, ICZN, ICSP