The "Lobivia" or "Mediolobivia" is now correctly a member of the Rebutia pygmaea complex. They tend to have deep tap roots and can be spectacular in bloom.

Nice blooms!

x

Thanks xerophyte, I'm not very good at keeping up with taxonomy. 8(

So does that mean there really isn't a "Lobivia" genus anymore?

Lobivia is currently placed under Echinopsis, and Mediolobivia has been combined with Rebutia. Wait and see how long it lasts ...

So, yes, it means that if you look in a recent book it is likely not to list Lobivia and Mediolobivia as genera.

Note: Some commercial growers would still list your plant as a Mediolobivia, but I have never seen it under Lobivia, that must have been before my time.

Yes, your last is a Cotyledon and an excellent shot of those blooms! :) Would need to see some leaves to figure species.