Help IDing these Mammillaria cacti

[Angel]

Hey everyone,

I just bought this two little cacti and I'm trying to identify them

Mammillaria_peninsularis_2.jpeg (99.82 KiB) Viewed 698 times

Mammillaria_peninsularis_1.jpeg (94.17 KiB) Viewed 698 times

This is the first one. I think it might be a M. peninsularis (mostly because of the globose-flattened stem) but those big beautiful spines confuse me

Mammillaria_tonalensis_2.jpeg (100.54 KiB) Viewed 698 times

Mammillaria_tonalensis_1.jpeg (71.83 KiB) Viewed 698 times

This is the second one. I think it might be a M. tonalensis

Any help is greatly appreciated

Thanks in advance,
Ángel

[7george]

The first one reminds me Mammillaria compressa. Seeing some flowers will help.

[Angel]

The first one reminds me Mammillaria compressa. Seeing some flowers will help.

Hi George, thanks for your input

It surely looks like a M. compressa althouh M. compressa has a globular-columnar stem. Maybe mine is too young and its stem is a bit flattened.

[Tom in Tucson]

I agree with 7george on the 1st ID.

As to your 2nd guess, I disagree that it is Mammillaria_tonalensis for 2 reasons:

1. Mammillaria_tonalensis is rare in cultivation.
2. Your plant has weaker spines than are typical.

I suspect the 2nd one might be Mammillaria occidentalis or Mammillaria thornberi

[Angel]

I agree with 7george on the 1st ID.

As to your 2nd guess, I disagree that it is Mammillaria_tonalensis for 2 reasons:

1. Mammillaria_tonalensis is rare in cultivation.
2. Your plant has weaker spines than are typical.

I suspect the 2nd one might be Mammillaria occidentalis or Mammillaria thornberi

Hi Tom,

Thanks for your help, I really appreciate it.

I discarded M. mazatanensis (M. occidentalis) and M. thornberi because those two have multiple hooked central spines and my little cactus has only one on each areole.

I have very little expirience with the genus and maybe those features I think are distinctive (the globose-flattened steam from the first one or the single hooked central spine on the second cactus) may change over time.

[anttisepp]

1st Mammillaria nejapensis