| Name | Polygonum hydropiper var. projectum Stanford |
| Authorship | Stanford |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Polygonum hydropiper Linnaeus |
| GUID | urn:lsid:ipni.org:names:206232-2 |
| Citation | 1927 Rhodora 29(341): 86 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Polygonum hydropiper var. projectum Stanford |
| Identification made in | [no date] (1), 1924 (1), 2019 (1) |