| Name | Hylocereus monacanthus (Lemaire) Britton & Rose |
| Authorship | (Lemaire) Britton & Rose |
| Rank | Species |
| Placed in | Hylocereus (A. Berger) Britton & Rose |
| Citation | 1920. (9 Sep 1920) Cactaceae (Britton & Rose) 2: 190, t. 29 |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Hylocereus monacanthus (Lemaire) Britton & Rose |
| Identification made in | [no date] (4) |