| Name | Haageocereus decumbens (Vaupel) Backeberg |
| Authorship | (Vaupel) Backeberg |
| Rank | Species |
| Placed in | Haageocereus Backeberg |
| Citation | 1934 Blätt. Kakteenf. 6: 2 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Haageocereus decumbens (Vaupel) Backeberg |
| Identification made in | [no date] (1) |
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