I might be having a chimera.

If its no chimera, what else can it be?

this plant , Selinicereus, usually has 4-6 ribs

Very strange. What's the second plant ?


It could be other things besides a chimera, the odds of getting a chimera are so huge that it would be similar odds to getting a natural variant, mutation, natural cross pollination etc.

Looks very funky.

Looks like some sort of mutation. Chimerae generally only form in grafted plants, and occasionally in tissue culture. I'm not aware of any 'natural' cacti chimerae. Did you use this plant for grafting?