| Name | Piper conejoense Trelease & Yuncker |
| Authorship | Trelease & Yuncker |
| Rank | Species |
| Placed in | Piper Linnaeus |
| Citation | 1950 Piperac. N. South Amer. 1: 46, f. 35 |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Piper conejoense Trelease & Yuncker |
| Identification made in | [no date] (4) |