Potamogeton Robbinsii, or more commonly know as Robbins' Pondweed, is a forb/herb (a forb/herb is a non-woody plant that is not a grass) with green foliage and green flowers of the genus Potamogeton. It has a rapid growth rate and a height of 0 feet at maturity. Its duration is perennial which means it will grow year after year. It's active growth period is summer, blooms during late summer and is intolerant of shade. Potamogeton Robbinsii or Robbins' Pondweed's floral region is North America US Lower 48 and Alaska, specifically in the states of Alaska, Alabama, California, Colorado, Connecticut, Delaware, Idaho, Illinois, Indiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Montana, New Hampshire, New Jersey, New York, Ohio, Oregon, Pennsylvania, Rhode Island, Utah, Virginia, Vermont, Washington, Wisconsin and Wyoming.