The Lily pad is the floating leaf of a water lily (Liliales pontederiaceae), a common aquatic plant found in temperate and tropical climates. Due to its rapid growth and lack of natural predators, the lily has turned into a troublesome weed. However, it can help maintain proper oxygen levels in wetlands. The lily is also related to the onion, asparagus, and yam.

The lily pad floats on top of the water but its roots are anchored to the muddy bottom of the pond. The lily pad's roots anchor the flowering plant and also absorb water and minerals from the soil for photosynthesis. When water reaches the leaves of the lily pad, it can begin the food-making process. Leaves of the water lily have a tough waxy surface to keep them from becoming waterlogged. As a young plant, the water lily's leaves are rolled up underwater. In the springtime, the leaves uncurl to form pads .

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