Publication: Rhodora. 19: 232. 1917.
selected vouchers: PLU
Notes: FNA5: "Polygonum achoreum frequently is confused with P. erectum. It can be distinguished by its usually homophyllous leaves, its perianth, which is enlarged at the base and constricted above the fruit, its longer perianth tube, and its yellow-green to tan, tubercled achenes."