[Pondweeds: The Genus Potamogeton in Mt. Adams Country]

Floating Pondweed, Floatingleaf Pondweed, Floating-leaved Pondweed

Potamogeton natans

Floating-leaved Pondweed, Floating Pondweed: Potamogeton natans - Floating-leaved Pondweed, Floating Pondweed: Potamogeton natans

Both images show the floating leaves and spike of floating pondweed as seen in a canal along the Willard Springs Trail at Conboy Lake NWR..........August 17, 2007. The base of the leaves of this species are rounded to cordate (heart-shaped) as seen here.

Floating-leaved Pondweed, Floating Pondweed: Potamogeton natans

Floating pondweed covering the canal that originates at Willard Springs, Conboy Lake National Wildlife Refuge.........September 20, 2012.

Floating-leaved Pondweed, Floating Pondweed: Potamogeton natans

Floating-leaved Pondweed, Floating Pondweed: Potamogeton natans - Floating-leaved Pondweed, Floating Pondweed: Potamogeton natans

The photo above shows a close-up of the floating leaves of floating pondweed as seen in the central canal through Conboy Lake NWR as seen at Kreps Lane.......July 31, 2008. Note again the rounded to slightly heart-shaped base to the leaves of this species.

Floating Pondweed, Floatingleaf Pondweed, Floating-leaved Pondweed: Potamogeton natans

The floating leaves of floating pondweed as seen in an old irrigatin canal along the Willard Springs Trail at Conboy Lake NWR..........August26, 2018.

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)

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