| Name | Polygonum amphibium f. simile Fernald |
| Authorship | Fernald |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Polygonum amphibium Linnaeus |
| GUID | urn:lsid:ipni.org:names:1079270-2 |
| Citation | 1946 Rhodora 48: 49 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Polygonum amphibium f. simile Fernald |
| Identification made in | [no date] (1), 2019 (1) |