I need help with the identification on the first Gymnocalycium as it was an unlabeled find at a local nursery when it was just a tiny thing. Now it's six-inches across - and lovely.
Not sure – Gymnocalycium monvillei (?)
Gymnocalycium mihanovichii
Gymnocalycium (gibbosum x baldianum) a cross I made in 2009.
Notocactus roseiflora
Notocactus scopa