| Name | Parietaria diffusa Mertens ex W. D. J. Koch |
| Authorship | Mertens ex W. D. J. Koch |
| Rank | Species |
| Placed in | Parietaria Linnaeus |
| Citation | 1823 Deutschl. Fl. (Mertens & W. D. J. Koch), ed. 3 1: 827. |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Parietaria diffusa Mertens ex W. D. J. Koch |
| Identification made in | [no date] (1) |
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