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

Fern pondweed growing in shallow water and onto the bank with twoheaded water-starwort (Callitriche heterophylla) in a stream passing through Summit Prairie, Malheur National Forest........August 20, 2011.

Fern pondweed growing in shallow water and onto the bank with twoheaded water-starwort (Callitriche heterophylla) in a stream passing through Summit Prairie, Malheur National Forest........August 20, 2011.