Species:
     Potamogeton berchtoldii   (Berchtold's or dwarf pondweed)
     Potamogeton crispus   (curled pondweed)
     Potamogeton diversifolius   (waterthread pondweed)
     Potamogeton fibrillosus   (fibrous pondweed)
     Potamogeton foliosus   (leafy pondweed)
     Potamogeton illinoensis   (Illinois or shining pondweed)
     Potamogeton natans   (broadleaf pondweed)
     Potamogeton nodosus   (longleaf pondweed)
     Stuckenia pectinata   (sago or fennel-leaf pondweed)