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a genus of aquatic plants of the family Cabom-baceae, formerly included in the Nymphaeaceae family. These plants are perennial grasses with creeping rootstock. The alternate, long-petioled leaves are submerged (finely dissected) and floating (entire, peltate, and leathery). The flowers are solitary and on long peduncles. There are three sepals, three petals, and three to six stamens. The fruit is three-seeded. Around seven species are found in tropical and subtropical America. Several species, including C. aquatica and C. rosifolia, are cultivated in aquariums. Plants of this genus are propagated with pieces of rhizome.