Sunflower (Helianthus annus) serves as the national flower of Ukraine. http://www.theflowerexpert.com stated: The government of Denmark declared Marguerite Daisy as the national flower of Denmark. The National Flower of Argentina is the Ceibo. The flower was adopted on December 2, 1942. The Iris is the national flower of France and is represented in the Fleur-de-lis emblem, the symbol of the French monarchy.