Potamogetonaceae

Alpine Pondweed, Northern Pondweed, Reddish Pondweed: Potamogeton alpinus (Synonyms: Potamogeton alpinus ssp. tenuifolius, Potamogeton alpinus var. subellipticus, Potamogeton alpinus var. tenuifolius ) -

Ribbonleaf Pondweed, Ribbon-leaved Pondweed: Potamogeton epihydrus (Synonyms: Potamogeton epihydrus var. epihydrus, Potamogeton epihydrus ssp. nuttallii, Potamogeton epihydrus var. nuttallii, Potamogeton epihydrus var. ramosus) -

Grassy Pondweed, Variable Pondweed, Variableleaf Pondweed, Variable-leaved Pondweed: Potamogeton gramineus (Synonyms: Potamogeton gramineus var. gramineus, Potamogeton gramineus var. maximus, Potamogeton gramineus var. myriophyllus, Potamogeton heterophyllus) -

Floating Pondweed, Floating-leaved Pondweed: Potamogeton natans -