LEMNACEAE, Duckweed Family

Small floating herbs; plant body a globose, convex, or fl at thallus, with or without roots from lower side; plants solitary or, when they do not separate after budding. in colonies; flowers (rarely observed) at edge of or on upper surface of thallus, perianlh none; staminate flower of 1 stamen, carpellate of an ovary with 1 to few ovules.