This is a familiar weed seen in ponds. When folks see water lilly, they know what it is. Fragrant water lilly a perennial plant with leaves that come off stalks from rhizomes. The leaves of water lilly are more round than heart-shaped and 6 to 12 inches in diameter. Leaves usually float on the water’s surface. The flowers are very fragrant and have white petals with yellow centers. The flowers may float or stick above the water and each opens in the morning and closes in the afternoon. White water lily can spread from seeds or the rhizomes.
Products containing 2,4-D, glyphosate, fluridone, triclopy, and imazamox work well in controlling this weed. White water lily can be cut and the rhizomes be dug up; however physical control is difficult since it can reestablish from seeds or remaining rhizomes. Click this link for more information on Fragrant Water Lilly.