Taxonomic status: Unresolved

homotypic synonyms:
Cactus horridus Colla; Horridocactus horridus (Colla) Backeb.; Pyrrhocactus horridus (Colla) Backeb.;

protologue: Repert. Spec. Nov. Regni Veg. 50: 207 (1941)
URL protologue: http://bibdigital.rjb.csic.es/ing/Libro.php?Libro=6633&Pagina=210

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