Children (11 direct children, 11 direct and indirect children):
Gymnocalycium riojense subsp. vertongenii
Gymnocalycium riojense subsp. guasayanense
Gymnocalycium riojense subsp. paucispinum
Gymnocalycium riojense var. guasayanense
Gymnocalycium riojense subsp. kozelskyanum
Gymnocalycium riojense subsp. piltziorum
Gymnocalycium riojense var. guthianum
Gymnocalycium riojense var. mirandaense
Gymnocalycium riojense var. pipanacoense
Gymnocalycium riojense var. platygonum
Gymnocalycium riojense var. sanjuanense