What I have is the non-flowering (normally) everlasting onion. It's very much like Welsh Onion, but smaller, and doesn't flower. It does flower occasionally, and someone sent me a seedhead last year which I believe to be from the same plant. I got one plant form the seeds I planted then, put the rest in this year, and have half a dozen seedlings from that. I should know for sure whether it's the same plant by the end of this season.