Discocactus zehntneri var. boomianus (Buining & Brederoo) P.J.Braun in Succulenta (Netherlands) 69: 218. 1990
Discocactus zehntneri var. boomianus in Succulenta (Netherlands) 69: 218. 1990
is new combination for Discocactus boomianus in Succulenta (Netherlands) 50: 26. 1971