Lily Pad

The lilypad is an item in the 1.9 pre-release, found growing in water inside swamp biomes. Apart from this, little is known.

Breaking the lily pad will place it in your inventory. It can be replaced, but only on top of swamp water, and only by placing it against a block that is above, and adjacent to, the water surface.

They actually have no use or purpose except aesthetic one. They can be passed through (swum) and broke, but not craftable. They usually spawn near Vines.