Discocactus heptacanthus subsp. magnimammus (Buining & Brederoo) N.P.Taylor & Zappi in Bradleya 9: 86. 1991
Discocactus heptacanthus subsp. magnimammus in Bradleya 9: 86. 1991
is new combination for Discocactus magnimammus in Kakteen And. Sukk. 25: 242. 1974