| Name | Piper guazacapanense Trelease & Standley |
| Authorship | Trelease & Standley |
| Rank | Species |
| Placed in | Piper Linnaeus |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Piper guazacapanense Trelease & Standley |
| Identification made in | [no date] (2) |