| Name | Polygonum cespitosum var. longisetum (Bruijn) Steward |
| Authorship | (Bruijn) Steward |
| Rank | Variety |
| Placed in | Polygonum cespitosum Blume |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Polygonum cespitosum var. longisetum (Bruijn) Steward |
| Identification made in | [no date] (3) |
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