The water lily is perhaps the most poetic flower that exists and is known as Nymphaea; an aquatic plant in the family Nymphaeaceae. They are opulent with iridescent colors and dream their hours away in their watery gardens. Some water lilies open under reflected sunlight and sink beneath the water at twilight, while other species such as the Egyptian white water lily seek moonlight. Should you be so fortunate as to view one in perfect bloom it will intoxicate you with its bewitching beauty and leave an indelible watery impression of the other world upon you.
This symbolizes the original nature of the heart (hrdaya). It is the lotus of love, compassion, passion, activity and all the qualities of the heart. It is the lotus of Avalokitesvara. http://www.buddhanet.net/e-learning/history/b_lotus.htm