| Name | Polygonum latum Small ex Rydberg |
| Authorship | Small ex Rydberg |
| Rank | Species |
| Placed in | Polygonum Linnaeus |
| Citation | 1932 Fl. Plains N. Amer. 282 |
| Holdings | 11 Specimens held in the Harvard University Herbaria identified as Polygonum latum Small ex Rydberg |
| Identification made in | [no date] (9), 1941 (2) |
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