Two Mammillarias more ....

I hope your opinions. Thanks.

Mammillaria 1





Mammillaria 2





Greetings

Hi again,
I think the first is M. karwinskiana, or one of its subspecies, but probably just karwinskiana.

The second looks a bit worse for wear, but I'd suggest M. backebergiana. I can't quite see if it has 1 or 2 central spines, there is a second darker spine, but it might be radial rather than central. The darker epidermis suggests ssp. ernestii, but this is supposed to have only 1 central spine.

I think it has two central spines, but I'm sure you have more experience than me. Sending a picture with more detail.

Detail spines





Greetings

Juan Carlos