Discocactus mamillosus Buining & Brederoo in Kakteen And. Sukk. 25: 217. 1974 Discocactus mamillosus Buining & Brederoo in Kakteen And. Sukk. 25: 217. 1974is basionym for Discocactus hartmannii var. mamillosus (Buining & Brederoo) P.J.Braun in Kakteen And. Sukk. 36: 23. 1985Taxon for this nameDiscocactus mamillosus Buining & Brederoo