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CCDB → Angiosperms → Cactaceae → Echinocactus → Echinocactus polycephalus Engelm. & J. M. Bigelow
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Echinocactus polycephalus Engelm. & J. M. Bigelow | Echinocactus polycephalus Engelm. & J. M. Bigelow | 11 | IPCN online | Pinkava, D. J. & D. J. Keil. 1977. Chromosome counts of Compositae from the United States and Mexico. Amer. J. Bot. 64: 680–686. | ||
| ! | Echinocactus polycephalus Engelm. & J. M. Bigelow | Echinocactus polycephalus Engelm. & J. M. Bigelow | 11 | IPCN75-78 | Pinkava et al. 1977 | ||
| Echinocactus polycephalus var. polycephalus | Echinocactus polycephalus Engelm. & J. M. Bigelow | 22 | eFlora |