The Nature of Things

My little goldfish pond is full of life and it isn't only the fish. There are frogs, mainly Southern Leopard frogs, including lots and lots of tadpoles. Above and around the pond, dragonflies dart and dip. And in the pond, several plants live quite happily, feeding on and converting the fish waste and other detritus. The plants help to clean the water, which also keeps the fish happy. The white water lily is a perennial plant that often forms dense colonies. The round, slightly heart-shaped leaves are bright green and 6 to 12 inches in diameter. They float on the water's surface, providing shade and hiding places for the fish, something which I'm sure they appreciate on the hottest days of summer. After all, these are cold water fish. The flowers of the water lily arise on stalks that are separate from leaf stalks. They are brilliant white with yellow centers. The flowers float or stick above the water. They open in the morning and close in the late afternoon. The flowers a...