Alismataceae Vent.

Water-plantain Family

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Plants > Angiosperms > Alismataceae

Kingdom: Plantae
Clade: Angiosperms
Class:  Monocots
Order: Alismatales
Family: Alismataceae

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​The water-plantains are a family of flowering plants, comprising 11 genera and between 85 and 95 species. The family has a cosmopolitan distribution, with the greatest number of species in temperate regions of the Northern Hemisphere. Most of the species are herbaceous aquatic plants growing in marshes and ponds. Wikipedia

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Genera: Echinodorus, Hydrocleys, ​Limnocharis

Echinodorus cordifolius

Hydrocleys nymphoides

Limnocharis flava

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References: 
Wikipedia