Is it Mammillaria spinosissima?

[A1essandro]

Hi!

I have bought this cactus but did not identified it. One collector suggested that it is Mammillaria spinosissima.

But I have one M. spinosissima and it very different.

[7george]

No, it is a different Mammillaria.

[Edwindwianto]

I'am not good at all at this

But i guess, it is Mammillaria brandegeei subs. lewisiana
The description can be read here

Or in the The Cactus Family
I quote page 410

Screenshot_2020-03-19-10-36-26-1.png (403.96 KiB) Viewed 996 times

My guessing is only based on that spination, white with black tip
But since yours doesn't have wool...i think my guessing could be wrong...

EDWIN

[A1essandro]

Thank you!
Hmmm. My cactus does not have a central spine.
I looked through llifle and cacti guide but not found same by photos.

[Edwindwianto]

Thank you!
Hmmm. My cactus does not have a central spine.
I looked through llifle and cacti guide but not found same by photos.

I think the presence or absence of central spines, maybe because of age too
I observe that my O. macdaugallii didn't produce any central spines until lately...

But yes, i think it is highly unlikely that yours is M. brandegeei

EDWIN

[A1essandro]

I think the presence or absence of central spines, maybe because of age too
I observe that my O. macdaugallii didn't produce any central spines until lately...

Thanks Edwin!

Hmm. With this new information I'm think that it is Mammillaria centralifera.

[TimN]

This is a young plant and may be hard to match to descriptions of mature specimens. Wool or bristles are other attributes that generally aren't apparent in young plants. For now, it looks like a Mammillaria with non-keeled tubercles. Time will tell.

[7george]

Can be Mammillaria polythele as well. But with age this seedling will change and spines can divide into centrals and radials, so other features.

[DaveW]

It's often easier to identify what a plant is not rather than what it is. M. spinosissima is very characteristic therefore it certainly is not that species since your plant is from a different group of Mammillaria's.

http://www.llifle.com/Encyclopedia/CACT ... inosissima

[A1essandro]

Thanks!

Now I signed it as M. compressa (centralifera). One spine in each new areola tends to be longer than each other.

But it's may be a M. prolifera.

Time will tell.

Thank you.

[DaveW]

Certainly not Mammillaria prolifera. As I said easier to tell what it is not!

http://www.llifle.com/Encyclopedia/CACT ... _prolifera

[A1essandro]

Oh... Sorry!

It's my mistake in message.

It is may be a M. polythele.

[DaveW]

M. polythele maybe?

[Dodi Russell]

It's still too young to id it properly