Bödecker, Z. f. Sukkulentenkunde, 3(11):229-230, 1928: Simplex oviformis, costis perfecte in mamillas quadrangulares-sub-conoideas secundum 8 et 13 series spiraliter dispositas solutis; areolis albido-lanatis dein glabrescentibus; aculeis 3, rarius 4, paullo volubilibus apicem versus arcuatis griseo-fuscis; floribus roseis, ovario globoso olivaceo.