Mammillaria magnimamma 'krameri'

In flower at the end of last week when it was sunny - the flowers are closed shut these last few days.
Mammillaria krameri is one of the larger flowered forms of magnimamma. This plant came from Southfields nursery last year.

Hello Chris,
I've a "krameri", also from Southfields, and the flowers are almost white with a thin red midstripe.