Ritterocactus langsdorfii subsp. multiceps (Hofacker & K.Herm) Doweld in Sukkulenty 3: 60. 2000
Ritterocactus langsdorfii subsp. multiceps in Sukkulenty 3: 60. 2000
is new combination for Parodia langsdorfii subsp. multiceps in Kakteen And. Sukk. 50: 62. 1999