This species is sometimes considered to include the blue Egyptian lotus "Nymphaea caerulea". Both "Nymphaea caerulea" and "Nelumbo nucifera" contain the alkaloids nuciferine and aporphine. The traditional Sacred Lotus is only distantly related to "Nymphaea caerulea", but possesses similar chemistry. Nuciferine is an alkaloid found within the plants "Nymphaea caerulea" and "Nelumbo nucifera". The two species of water lily used were "Nelumbo nucifera" and "Nymphaea macrosperma". In "Nymphaea lotus", the tiger lotus, leaf variegations appear under intense illumination. The provincial flower is the Lotus ("Nymphaea lotus"). The provincial flower is the lotus ("Nymphaea lotus"). Water lily "(Nymphaea nouchali)" is the National Flower of Bangladesh. In northern latitudes, the water lilies Nymphaea and Nuphar are the most important herbaceous component. Nymph Lake is named for the yellow lily, "Nymphaea polysepala", on its surface. The species is less tolerant of water pollution than water-lilies in the genus "Nymphaea". The genus name refers to their resemblance to the water lily "Nymphaea". Nymphaea thermarum is the world's smallest water lily. A water lily cultivar of the genus "Nymphaea" has also been named in his honor.