As for the stem itself, the heads and the whole plant in general, you have a mutant.
I don't know how safe it is to smoke, but you have something every grower would love to have.
I had two pieces 6-7 years ago, they were much funnier than this hahaha, but I threw them away in ignorance because I thought they couldn't be smoked, but after reading a little, I realized that it all depends on plant to plant and mutation to mutation, so I don't know what to tell you.
We are waiting for someone to contact us who has more experience with these types of plants.
the flowers that are born on the stem, I think it's just because you didn't remove unnecessary shoots well when you did the defoliation, I don't believe they're from a mutation.