| Name | Polygonum cascadense W. H. Baker |
| Authorship | W. H. Baker |
| Rank | Species |
| Placed in | Polygonum Linnaeus |
| Citation | 1949 Madroño 10: 62 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Polygonum cascadense W. H. Baker |
| Identification made in | [no date] (2) |
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