Alpine Pondweed, Northern Pondweed, Reddish Pondweed
Potamogeton alpinus
Synonyms: Potamogeton alpinus ssp. tenuifolius, Potamogeton alpinus var. subellipticus, Potamogeton alpinus var. tenuifolius, Potamogeton tenuifolius, Potamogegon tenuifolius var. subellipticus
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The photo at left shows a close-up of the inflorescence of alpine pondweed as seen in a small stream that runs through Swampy Meadows on the western slopes of Mt. Adams.........September 6, 2008. The photo at right shows a close-up of the submerged stem leaves of alpine pondweed as seen in a small stream that runs through Swampy Meadows on the western slopes of Mt. Adams.........September 6, 2008. The leaves of this species are all similar in shape.
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The photo above shows a close-up of the inflorescence of alpine pondweed as seen in a small stream that runs through Swampy Meadows on the western slopes of Mt. Adams...........September 6, 2008.
Alpine pondweed growing in a stock pond with floating pondweed on Klickitat Wildlife Area lands near Grayback Mountain, Klickitat County, WA.....September 20, 2025.
Paul Slichter