Thanks, stupid me its Rebutia yes, i used to keep some other Rebutia species long time ago, but i moved my collection and recently i back to collect just some pieces, thanks so much.

Can you please help in identifying my cactus? Mostly its a mammillaria but i can't get its species, also is it necessary for this species to be grafted ? or its can grow well in its own roots? thanks. http://roseicollis.net/cactus/100_5564.JPG http://roseicollis.net/cactus/100_5514.JPG http://roseic...