Potamogeton amplifolius
 Potamogeton amplifolius commonly known as largeleaf pondweed or broad-leaved pondweed is an aquatic plant of North America. It grows in water bodies such as lakes ponds and rivers often in deep water.This perennial plant grows from rhizomes and produces a very slender cylindrical sometimes spotted stem up to a meter or so long. The leaves take two forms. Submersed leaves are up to 20 centimeters long by 7 wide and may be folded along their midribs.