Fragrant Water Lily (Nymphaea odorata) Pink and White forms: A floating aquatic with fragrant white or pink flowers. Found in calm water. Blooms June - September. Location: Black Moshannon SP, PA.

American Water Willow (Justicia americana): Small white flowers with orchid/purple markings. Grows along banks of streams, rivers and lakes. Roots are always submerged. Location: Potomac River, Great Falls National Park. Photo by Ken Clark.

Spadderdock/Yellow Pond Lily/Yellow Cow Lily/Bullhead Lily (Nuphar variegatum): Tough, leathery cup-like flowers. Blooms May - September. Location: Black Moshannon SP, PA.

Northern Pitcher Plant (Sarracenia purpurea): Carnivorous! Height 8 to 24 inches. Leaves up to 12 inches. Each plat has a large leathery crimson flower with 5 petals dangling over the basal leaves. Leaves veined deeply red, inflated and in the shape of a pitcher. The flower attracts insects which fall into the "pitchers" which are partially full with water. Inverted hairs on the leaf surface prevent their escape. The plant extracts the nutrients from the water as the insect decomposes. Photo by Marc Shaffer.

Wild Rice (Zizania aquatica): Grows in wetlands. Can reach a height of 9 feet. Simple white flowers on upper, erect branches are female. Flowers on drooping, lower branches are male. The grain is edible. Location: Jug Bay, Patuxent River, MD. Photo by Ken Clark.