The term 'Blue Flower' can refer to two different plants: the IRIS and the Nile. The IRIS is a genus of flowering plants with showy flowers that come in a variety of colors, including blue. It is native to the Mediterranean region and is widely cultivated as a garden flower. The Nile is a species of lily that is native to tropical Africa and is characterized by its large, bright blue flowers. Both the IRIS and the Nile are popularly used in gardens and bouquets for their beautiful blue blooms.