| Name | Polygonum douglasii var. latifolium (Engelmann) Greene |
| Authorship | (Engelmann) Greene |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Polygonum douglasii Greene |
| GUID | urn:lsid:ipni.org:names:206179-2 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Polygonum douglasii var. latifolium (Engelmann) Greene |
| Identification made in | [no date] (2) |