| Name | Polygonum amphibium var. emersum Michaux |
| Authorship | Michaux |
| Rank | Variety |
| Placed in | Polygonum amphibium Linnaeus |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Polygonum amphibium var. emersum Michaux |
| Identification made in | [no date] (5) |
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