There is a name for that which I unfortunately cannot remember now. Lucky knows what it is. I have gotten it several times and I pruned it off and regular shoots grew back. My vague memory is that some people are concerned that it can spread; I never had more than isolated instances of it.

Scott

I wonder if it's related to the mechanisms which initiate sports of a different phenotype. I also wonder if it's something in the environment flipping switches in the physiology and phenotypic expression of the genes. The fact that it replicated from one season to the next is interesting. Time to prune!
Thanks!

There's FB in my yard. Could I apply a little 3xantibiotic ointment on the cut? I have copper too, but recall toxicity issues. Am I too careful in this case? Thanks

Fasciation. look it up.

Thanks Lucky! That's super interesting! First thing I thought was ...a virus is responsible...

Had to hit and run earlier. If you googled up images, you see it happens in many plant species.
I've seen it from time to time in pecan/walnut/hickory, as well as pear - and probably in some non-woody annuals.
Have never intentionally tried to propagate fasciated stuff - though there are probably some folk - like those who seek out witches' brooms - who'd be interested in trying.

I saw it on Rose bushes.