mammillaria

hi, can someone help me in identification? really thank
jenny


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Hi Jenny,
Glad that you managed to work through the image posting stuff, it can be a bit daunting the first time.
Your plant is, I believe, a form of Mammillaria formosa. This is a very variable species, and if you look at the A-Z gallery under F, and then formosa, a long way down the many photos you will find a photo of M. Formosa aff Rog 326. This form has close white radial spines and an upward pointing very short dark central spine. Your plant resembles this, though I can't be sure it is exactly the same, but certainly the same species.

thank you Chris. I'll undoubtedly put the right card on the plant.
I have a little greenhouse in the Museo Civico Craveri in Bra, and there's a little and modest collection of cactaceae. there are some plants with localization data, and some I bought in market or not specialized places. so many of them are without a sure name. I'll ask your help again...
jenny