| Name | Pycnanthemum leptodon (A. Gray) A. Gray |
| Authorship | (A. Gray) A. Gray |
| Rank | Species |
| Placed in | Pycnanthemum |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Pycnanthemum leptodon (A. Gray) A. Gray |
| Identification made in | [no date] (2), 1939 (2) |