Potamogeton is a genus of aquatic, rooted, monocotyledon herbs; colonial from creeping rhizomes.
Leaves alternate, or occasionally, upper leaves subopposite especially if above water surface; veins parallel or single; base of leaf sheathed, sheath projecting above the leaf attachment as a ligule (as in Poaceae). In species that have floating leaves, those on the surface are different than those produced under water.
Flowers very small, radially symmetrical, 4-parted, petals and sepals alike (tepals); inflorescences of spikes usually held somewhat above the water surface.
Fruit: small, 1-seeded, beaked capsules.
Wetland status: OBL