Pterocactus skottsbergii (Britton & Rose) Backeb. in Desert Pl. Life 22: 17. 1950 Pterocactus skottsbergii (Britton & Rose) Backeb. in Desert Pl. Life 22: 17. 1950is new combination for Opuntia skottsbergii Britton & Rose, Cactaceae 1: 96–97, f. 114. 1919Taxon for this namePterocactus skottsbergii (Britton & Rose) Backeb.