- Popular name(s): Water Cabbage, Water Lettuce, Nile Cabbage, Shellflower, Waterbonnet, Tropical Duckweed
- Botanical name: Pistia stratiotes
- Family: Araceae
- Origin: Tropical and subtropical regions in Africa, Asia, Australia, North America and South America. The origin is not known.
- Height: 20 to 30 centimetres
- USDA zone: 12 (10 °C)