the flying dutchman

Okay, here you go, altough I am not a specialist i would say any banana
can flower. The thing is it depends on the circumstances it grows.
You probably have a cold-hardy banana and by saying that it might be inedible too as it will be a seeded one in that case.
I could be mistaking, but as it grows back after frosts it looks like that.
I still hope someone can identify it.

Ron