fish
inverts
plants
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     Sagittaria
     Salvinia
     Samolus
     Saururaceae
       Anemopsis
       Gymnotheca
       Houttuynia
       Saururus
     Schismatoglottis
     Schoenoplectiella
     Scrophulariaceae
     Sesbania
     Shinnersia
     Sparganium
     Spirodela
     Staurogyne
     Stratiotes
     Strobilanthes
     Subularia
     Syngonanthus
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misc

Saururaceae is a plant family comprising four genera and seven species of herbaceous flowering plants native to eastern and southern Asia and North America.