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Genus Naias
- sole genus of the family Naiadaceae
Genus Najas
- sole genus of the family Naiadaceae
Genus Alisma
- small genus of aquatic or semiaquatic plants
Genus Sagittaria
- genus of aquatic herbs of temperate and tropical regions having sagittate or hastate leaves and white scapose flowers
Genus Elodea
- submerged freshwater perennials
Genus Egeria
- small genus of dioecious tropical aquatic plants