Gymnocalycium spegazzinii subsp. bayrianum (H.Till) Halda in Cactaceae etc. 9(3): 84. 1999
Gymnocalycium spegazzinii subsp. bayrianum in Cactaceae etc. 9(3): 84. 1999
is new combination for Gymnocalycium bayrianum in Kakteen And. Sukk. 38(8): 191. 1987