Tephrocactus microdiscus (F.A.C.Weber) G.D.Rowley in Tephrocactus Study Group 12(3): 46. 2006 Tephrocactus microdiscus (F.A.C.Weber) G.D.Rowley in Tephrocactus Study Group 12(3): 46. 2006is new combination for Opuntia microdisca F.A.C.Weber in Bois, Dict. Hort.: 896. 1898Taxon for this nameTephrocactus microdiscus (F.A.C.Weber) G.D.Rowley