Thelocactus bicolor var. schwarzii (Backeb.) E.F.Anderson in Bradleya 5: 61. 1987.

Nomenclatural References

• literature : Anderson, E. F. (1987). A revision of the genus Thelocactus B. & R. (Cactaceae). Bradleya, 5(5), 49–76. https://doi.org/10.25223/brad.n5.1987.a3 DOI link imported from Page, R. (2023). doi:10.5281/zenodo.7974720
• person : Curt Backeberg (1894-1966) Based on occurrence of standard abbreviation 'Backeb.' in the authors string.
• person : Edward Frederick Anderson (1931-2001) Based on occurrence of standard abbreviation 'E.F.Anderson' in the authors string.