| Name | Polygonum roylei Babcock |
| Authorship | Babcock |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Polygonum Linnaeus |
| Citation | 1838 Trans. Linn. Soc. London 18: 115 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Polygonum roylei Babcock |
| Identification made in | [no date] (2), 1930 (1) |
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