In this category I am going to highlight several species of the genus Gymnocalycium, beginning with a plant from the Gran Chaco in Paraguay: G. paediophilum.
Gymnocalycium heidiae x STO 780
Gymnocalycium andreae WR 108
Gymnocalycium matoense VoS 288
Gymnocalycium hyptiacanthum WP 59-73
Frailea matoana VoS 260
Gymnocalycium monvillei var. steineri STO 219
Gymnocalycium monvillei subsp. achirasense var. kainradliae