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CCDB → Angiosperms → Cactaceae → Mammillaria → Mammillaria humboldtii Ehrenb.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Mammillaria humboldtii Ehrenb. | Mammillaria humboldtii Ehrenb. | 22 | IPCN online | Das, A. B., S. Mohanty & P. Das. 1999. Karyotype diversity in thirteen species of Mammillaria in the family Cactaceae. Cytobios 97: 117–125. |