Rebutia fiebdgii Britton & Rose, Stand. Cycl. Hort. 5: 2915. 1916
Rebutia fiebdgii, Stand. Cycl. Hort. 5: 2915. 1916
is new combination for Echinocactus fiebrigii in Notizbl. Königl. Bot. Gart. Berlin 4: 183. 1905
non Rebutia fiebrigii in Cycl. Amer. Hort. 5: 2915. 1916