Potamogeton epihydrus is a perennial aquatic plant known by the common names ribbonleaf pondweed and Nuttall's pondweed (not to be confused with Elodea nuttallii), and American pondweed in the United Kingdom. It is native to much of North America, where it grows in water bodies such as ponds, lakes, ditches, and slow-moving streams.
The plant is a perennial rhizomatous herb producing narrow, compressed, unspotted stems, up to a length of about 1 m, which are unbranched or sparingly branched. It has ...