Taxonomic status: Unresolved

homotypic synonyms:
Echinocactus ottonis (Lehm.) Link & Otto; Malacocarpus ottonis (Lehm.) Britton & Rose; Parodia ottonis (Lehm.) N.P. Taylor;

protologue: Index Seminum (HBG) 1827: 16 (1827)
URL protologue: https://archive.org/stream/#page/16/mode/2up

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