I think so Celticrose. I havent seen this on any of my other plants. first thought was they grew too close together and grafted themself. But with this one I dont believe thats the case.
That's pretty interesting..... I've seem Mammillarias do something similar.
A cactus and succulent collector who especially likes Ariocarpus. …Though I have a bit of everything! Want some pictures? See my flickr! I also do art and such.
I have had this happen 3 times I know of. My echinopsis made a baby offset that did that but I lost in the freeze and I have a cereus that did that I still have. I had an Opuntia do that but it had about 8 divisions and was cottony looking. It was growing fine but stupid me I cut it off and grafted it and the graft did not take and it died. So I did not get to enjoy an 8 headed opuntia.
Pic with the flower buds on it sure doesn't look like a sagauro.. I see what you guys mean tho.
(edit) the new spines are wrong they don't grow like that, but they sure do look similar.
Here's to you, all you insidious creatures of green..er I mean cacti.