Eriosyce clavata subsp. nigrihorrida (Backeb. ex A.W.Hill) Helmut Walter in Bradleya 26: 92. 2008.

Nomenclatural References

• literature : Walter, H. (2008). Floral biology, phytogeography and systematics of Eriosyce subgenus Neoporteria (Cactaceae). Bradleya, 26(26), 75–98. https://doi.org/10.25223/brad.n26.2008.a6 DOI link imported from Page, R. (2023). doi:10.5281/zenodo.7974720
• person : Arthur William Hill (1875-1941) Based on occurrence of standard abbreviation 'A.W.Hill' in the authors string.
• person : Curt Backeberg (1894-1966) Based on occurrence of standard abbreviation 'Backeb.' in the authors string.
• person : Helmut Walter (b.1947) Based on occurrence of standard abbreviation 'Helmut Walter' in the authors string.