| Name | Polygonum suffultum var. pergracile (Hemsley) Samuelsson |
| Authorship | (Hemsley) Samuelsson |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Polygonum suffultum Maximowicz |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Polygonum suffultum var. pergracile (Hemsley) Samuelsson |
| Identification made in | [no date] (1) |