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CCDB → Angiosperms → Cactaceae → Peniocereus
| Taxon name | Status | Median (n) |
| Peniocereus greggii (Engelm.) Britton & Rose | Accepted | 11 |
| Cereus greggii var. transmontanus Engelm. | Synonym of Peniocereus greggii subsp. transmontanus (Engelm.) U. Guzmán | 11 |