| Name | Potentilla drummondii subsp. breweri (S. Watson) Ertter |
| Authorship | (S. Watson) Ertter |
| Rank | Subspecies |
| Placed in | Potentilla drummondii Lehmann |
| Holdings | 19 Specimens held in the Harvard University Herbaria identified as Potentilla drummondii subsp. breweri (S. Watson) Ertter |
| Identification made in | [no date] (19) |
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