Oval-Leaf Knotweed (Polygonum arenastrum)
Polygonum Arenastrum, or more commonly know as Oval-Leaf Knotweed, is a forb/herb (a forb/herb is a non-woody plant that is not a grass) of the genus Polygonum. Its duration is annual which means it grows for one season only. Polygonum Arenastrum or Oval-Leaf Knotweed's floral region is North America US Lower 48, Alaska, Hawaii and The Virgin Islands, specifically in the states of Alaska, Alabama, Arkansas, Arizona, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Iowa, Idaho, Illinois, Indiana, Kentucky, Louisiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, Mississippi, Montana, North Carolina, North Dakota, Nebraska, New Hampshire, New Jersey, New Mexico, Nevada, New York, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, Vermont, Washington, Wisconsin and Wyoming.
