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Plant Form: Aquatic mat-forming, floating herb.
Size: Up to 30 cm across.
Stem: Horizontal runners producing new plants.
Leaves: Undivided, widest near end, partly overlapping each other, up to 17 cm long, longitudinally ribbed, softly hairy, with short, inflated stalk. Has an overall lettuce-like appearance.
Flowers: Inconspicuous, between leaf bases, whitish-greenish, up to 2 cm wide.
Fruit and Seeds: Greenish berry 5-10 mm across.
Habitat: Ponds, lagoons, wetlands.