Polygonum aviculare L. ssp. aviculare
common knotweed, dooryard knotweed, doorweed
common knotweed, dooryard knotweed, doorweed
September 17,
Plymouth South High School, Plymouth
Identification tentative: short oval leaves suggesting P. aviculare ssp. aviculare or P. buxiforme, but the latter is usually mat-forming.