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CCDB → Angiosperms → Cactaceae → Peniocereus → Cereus greggii
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Cereus greggii | Cereus greggii W. Watson | 22 | IPCN online | Weedin, J. F. & A. M. Powell. 1978. Chromosome numbers in Chihuahuan desert Cactaceae. Trans-Pecos Texas. Amer. J. Bot. 65: 531–537. | ||
| ! | Cereus greggii var. transmontanus Engelm. | Peniocereus greggii subsp. transmontanus (Engelm.) U. Guzmán | 11 | IPCN67-71 | PINKAVA, D.J., & M.G. MCLEOD. 1971. Chromosome numbers in some cacti of western North America. Brittonia 23: 171-176. |