Stenocactus violaciflorus (Quehl) A. Berger ex A.W. Hill = Stenocactus dichroacanthus subsp. violaciflorus (Quehl) U. Guzmán & Vazq.-Ben.
English:
violaciflorus,-a,-um;

https://archive.org/stream/#page//mode/2up
homotypic synonyms:
Echinocactus violaciflorus (Quehl) Britton & Rose; Echinocactus violaciflorus Quehl; Echinofossulocactus violaciflorus (Quehl) Britton & Rose;

protologue: : (1933)

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