rhizomatous aquatic herbs with milky latex. Leaves simple, with long petiole,
arising directly from the rhizome, leaf blades orbicular, peltate, with
radiating veins. Flowers bisexual, hypogynous, on long peduncles, raised above
the water. Tepals many, spirally arranged, outer few sepaloid, inner ones petaloid.
Stamens numerous with sterile appendage. Carpels many, free, embedded singly in
cavities of the receptacle, ovule solitary in each carpel. Fruit of separate