[Wikipedia] Etymology: Originally described as Mammillaria tetrancistra by George Engelmann in 1852, the name tetrancistra comes from Greek words for 'four' and 'hook,' referring to the hooked central spines.[4] In 2021, Peter B. Breslin and Lucas C. Majure reclassified it into the genus Cochemiea. (link added by Mary Ann Machi)
Calflora:
Information on California plants for education, research and conservation,
with data contributed by
public and private institutions and individuals.
[web application]. 2025.The Calflora Database
[a non-profit organization].Available:
https://www.calflora.org/(Accessed: 03/29/2025).
