I believe this is a Mammillaria spinosissima. This summer it made itself another center. As you can see it has 2 of them. Does this mean its "clumping"? what can I expect for it to look like? is it going to spread?
It is not exactly clumping, it has split dichotomously. It it will look like a 'Y' with time. The term "clumping" is used when a plant forms a lot of offsets, bodies that originate from areoles and look like the main plant but smaller.
Oooooh thats kinda cool, I didn't know cacti could do that! Looks like I ought to get on with reading that cacti and succulents book I just bought..........
