This lovely little cactus is a cross of Rebutia heliosa and Rebutia albiflora known as 'Sunrise'. The albiflora parentage comes out sometimes as seen below on the left. A very nice, easy to grow.
A couple of days ago I may have had my tongue somewhat implanted in my cheek (don't try to translate that!) when I said that the artichoke cactus was easy, if... But, when I say that this is easy to grow, I mean it. It gets a lot of neglect by us throughout the winter and it continues on with grace. Highly recommended.