Mammillaria sartorii

This species was one of the first that I successfully brought to flower, from the first assorted batch of seeds I got from the UK in 2004.  Unfortunately, those seedlings fell prey to theft, and I determined that I needed to get this back in my collection.

So in 2011 I started over with a batch of seed, and here is the largest of them, blooming for the first time.  Surprisingly, the smaller ones bloomed last year, but only the occasional single flower or maybe two - but this one was worth waiting for.  I expect to be enjoying this for at least a week - something to open every day.

Mammillaria sartorii