Discocactus diersianus var. goianus (Diers & Esteves) P.J.Braun & Esteves in Kakteen And. Sukk. 44: 113. 1993
Discocactus diersianus var. goianus in Kakteen And. Sukk. 44: 113. 1993
is new combination for Discocactus goianus in Kakteen And. Sukk. 31: 79. 1980