Gymnocalycium gibbosum subsp. borthii (Koop ex H.Till) G.J.Charles in Cactaceae Syst. Init. 20: 18. 2005
Gymnocalycium gibbosum subsp. borthii in Cactaceae Syst. Init. 20: 18. 2005
is new combination for Gymnocalycium borthii in Kakteen And. Sukk. 38(8): 191. 1987
Gymnocalycium gibbosum subsp. borthii in Cactaceae Syst. Init. 20: 18. 2005