Grassy Pondweed, Variable Pondweed, Variableleaf Pondweed, Variable-leaved Pondweed
Potamogeton gramineus
Synonyms: Potamogeton gramineus var. maximus, Potamogeton gramineus var. myriophyllus
What appears to be grassy pondweed growing in a shallow pool in Swampy Meadows on the western flanks of Mt. Adams...........August 30, 2012.
What appears to be grassy pondweed growing in a shallow pool in Swampy Meadows on the western flanks of Mt. Adams...........August 30, 2012.
Paul Slichter