Tephrocactus russellii (Britton & Rose) Backeb. in Cactus (Paris) 38: 249. 1953 Tephrocactus russellii (Britton & Rose) Backeb. in Cactus (Paris) 38: 249. 1953is new combination for Opuntia russellii Britton & Rose, Cactaceae 1: 94–5, f. 111. 1919Taxon for this nameTephrocactus russellii (Britton & Rose) Backeb.