| Name | Armatocereus laetus (Kunth) Backeberg ex A. W. Hill |
| Authorship | (Kunth) Backeberg ex A. W. Hill |
| Rank | Species |
| Placed in | Armatocereus |
| Citation | 1938 Index Kew. 25 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Armatocereus laetus (Kunth) Backeberg ex A. W. Hill |
| Identification made in | [no date] (2) |