High Quality Content by WIKIPEDIA articles! This is a gallery of named canna cultivars, representative of the various Canna cultivar groups. Names of cultivars are regulated by the International Code of Nomenclature for Cultivated Plants, are registered with an International Cultivar Registration Authority (ICRA) and conform to the rules of the International Society for Horticultural Science (ISHS) Commission for Nomenclature and Cultivar Registration. The ICRA for the Canna genus is the Royal General Bulbgrowers` Association of the Netherlands (KAVB).