Hello, I would like to know the name of this Mammillaria

[arturo conan]

at first I thought it was pseudocrucigera, but the spination is different
what will it be?

[greenknight]

Mammillaria compressa, maybe.

[DaveW]

Agree with Spence, one of that group with bristles in the tubercle axils. There are many "names" for similar plants though in that group. Check for best fit with those in Series XIII in the classification below

https://www.cactus-art.biz/note-book/Ge ... llaria.htm

[arturo conan]

COMPRESSA.GRACIAS

[greenknight]

I had one very similar, and I was a bit puzzled, too. Sadly, mine died from some unknown cause. Should be very happy in your climate,

[anttisepp]

Mammillaria karwinskiana jr?

[Tom in Tucson]

Maybe Mammillaria karwinskiana fa. nejapensis

[mmcavall]

I have also thought on M. karwinskiana when I saw the picture. (Although I'm not familiar to M. compressa).

[arturo conan]

I'll look quietly in my books, maybe it's M. karwinskiana or as Tom says
http://www.llifle.com/Encyclopedia/CACT ... nejapensis
although I see the very long spines.
Well, we'll see when he grows up.
Anyway thank you very much

[greenknight]

M. karwinskiana has a lot of wool and long hair in the axils. Unless it develops those as it ages, I would discount that IDea.

[mmcavall]

My karwinskiana is much more wooly than that one, but when I found it in the supermarket it has no wool at all.

Perhaps it will be necessary to wait a little longer to have an ID.