One central spine in the former key
In the 2020 key to the narrowly circumscribed genus, Cochemiea poselgeri was distinguished by one central spine and 7–9 radial spines. The central spine belonged to the group with a hooked tip. The given range extended from Santa Rosalía to Cabo San Lucas in Baja California Sur. The set concerns the classical group of red-flowering species covered by that key. [García Morales et al. 2020, p. 5, species key]
Material in the plastid tree
In the 2021 tree, C. poselgeri material formed a pair with C. halei, whose central spines are straight. The difference in spine form in closely related samples shows the need to assess many traits together. Samples were examined under the historical name Mammillaria poselgeri. [Breslin et al. 2021, Breslin et al., p. 313, fig. 2. POWO, as of 11 October 2026] [2-WWW]
Related articles
Materials from the author's archive
The species also appears in Konrad Szychowski's private material archive. [Anonim b.d.y, file p. 1] [Lindsay 1959, file p. 3, 4] [Kaktologia 2009b, file p. 14] [Neciu b.d., file p. 1]
Synonyms and names in the literature
Cochemiea roseana · Mammillaria poselgeri · Mammillaria radleana · Mammillaria radliana · Mammillaria roseana [2-WWW]