Potamogeton natans

Potamogeton natans L. (Broad-leaved Pondweed, Floating Pondweed, Floating-leaf pondweed) is an aquatic species in the genus Potamogeton native to quiet or slow-flowing freshwater habitats throughout the Holarctic Kingdom. It produces both floating and submersed leaves on the same plant. The floating leaves are ovate to oblong-ovate and almost always heart-shaped at the base. They are dark green, leathery, opaque, with translucent longitudinal veins. They are 5 to 10 centimeter long, pointed at the tips, and rounded at the base.