Wikijunior:Summer Flowers of Northern New England/Nuphar variegata
Bullhead Lily is a yellow flower that grows in the shallow water of ponds. The leaves are large and heart-shaped, and they float on top of the water. They are lily pads in every sense of the word! The inside of the flower is usually a very busy place for insects. They are there to gather the flower's nectar, and in doing so, they pollinate the flower. The flowers grows at the end of a stem which pushes the blossom a couple of inches higher than the surface of the water. The stems can only grow to about 16 inches, so Bullhead Lilies cannot grow in water any deeper than that.