Discocactus zehntneri subsp. boomianus (Buining & Brederoo) N.P.Taylor & Zappi in Bradleya 9: 86. 1991
Discocactus zehntneri subsp. boomianus in Bradleya 9: 86. 1991
is new combination for Discocactus boomianus in Succulenta (Netherlands) 50: 26. 1971
Discocactus zehntneri subsp. boomianus in Bradleya 9: 86. 1991