| Name | Pycnanthemum loomisii Nuttall |
| Authorship | Nuttall |
| Rank | Species |
| Placed in | Pycnanthemum |
| Citation | 1834 J. Acad. Nat. Sci. Philadelphia 7(1): 100 |
| Holdings | 66 Specimens held in the Harvard University Herbaria identified as Pycnanthemum loomisii Nuttall |
| Identification made in | [no date] (46), 1960 (2), 1990 (14), 2005 (4) |
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