If i name the above as Mammillaria nejapensis would there be agreement?
Regards,
Masud.

Mammillaria nejapensis looks possible!

http://www.google.co.uk/search...

Check the descriptions of Mammillaria karwinskiana, it's a subspecies of that.

http://mammillarias.net/galler...

http://cactiguide.com/cactus/?...

Mammillaria karwinskiana subsp. nejapensis ..

http://www.theplantlist.org/tp...

But, look at others which may be a better match ..

http://johnpschaefer.com/list-...

This one is another confusion. I have this one also some where Mammillaria bocasana.
200 recognised species, 171 known species.
#1. Mammillaria amajacensis .
#2. Mammillaria hahniana.
#3. Mammillaria melanocentra.
http://cactiguide.com/cactus/?...
Will be needing this latter when I find that white fur spine ball in the morning. Janet if Lynn takes a look at Mammillaria sempervivi 2 and the rest in bloom .
I have a feeling that this one will cause a bit of fun. Lets give some time for the others to comment.
Regards,
Masud.

No disagreement so far.
Regards,
Masud.