fish
inverts
plants
   a
   b
   c
   d
   e
   f
   g
   h
   i
   j
   l
   m
   n
   o
   p
   r
   s
     Sagittaria
     Salvinia
     Samolus
     Saururaceae
       Anemopsis
       Gymnotheca
       Houttuynia
       Saururus
         cernuus
         chinensis
     Schismatoglottis
     Schoenoplectiella
     Scrophulariaceae
     Sesbania
     Shinnersia
     Sparganium
     Spirodela
     Staurogyne
     Stratiotes
     Strobilanthes
     Subularia
     Syngonanthus
   t
   u
   v
   w
   x
   z
misc