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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
Genus Potamogeton
- a large genus of aquatic herbs found in quiet waters in temperate regions; leaves usually float on the water
Genus Groenlandia
- a monocotyledonous genus of the family Potamogetonaceae