| Name | Pachypodium horombense Poisson |
| Authorship | Poisson |
| Rank | Species |
| Placed in | Pachypodium Lindley |
| Citation | 1924 Bull. Trimestriel Acad. Malgache 6: 165 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Pachypodium horombense Poisson |
| Identification made in | [no date] (1), 1997 (2) |