[Pondweeds: The Genus Potamogeton East of the Cascade Mountains of Oregon and Washington]

Ribbonleaf Pondweed, Ribbon-leaved Pondweed

Potamogeton epihydrus

Synonyms: Potamogeton epihydrus ssp. nuttallii, Potamogeton epihydrus var. epihydrus, Potamogeton epihydrus var. nuttallii, Potamogeton epihydrus var. ramosus

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

The photo above shows a close-up of ribbonleaf pondweed as seen in one of the slow-draining pools in Swampy Meadows on the western slopes of Mt. Adams.....................September 6, 2008. The submerged stem leaves are much different in shape than the floating leaves as seen here. The submerged stem leaves are long, narrow (but greater than 2 mm) and have a prominent midvein which runs their length (barely visible here).

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

The photo above shows a close-up of the floating leaves of ribbonleaf pondweed as seen in Swampy Meadows on the western slopes of Mt. Adams.....................September 6, 2008.

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

The photo above shows a close-up of ribbonleaf pondweed as seen in Swampy Meadows on the western slopes of Mt. Adams.....................September 6, 2008.

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

The photo above shows a close-up of the floating leaves of ribbonleaf pondweed as seen in one of the slow-draining pools in Swampy Meadows on the western slopes of Mt. Adams.....................September 6, 2008.

Paul Slichter