What is my Welsh Onion flower doing?

What on Earth is my Welsh Onion flower doing?

It flowered last year, alone, and didn't set a single seed.

This year there are two of them, but the other one isn't open yet. I put the pot they are in next to the White Lisbon onions which are just beginning to flower in the hope that if I couldn't get pure Welsh Onions, which are Allium fistulosum, then I might at least get an interspecies hybrid with the White Lisbon onions, which are Allium cepa. That hybrid is essentially what the Egyptian Walking onion is.

There are also some chives flowering not far away.

But what is happening to the flower? Are onions supposed to do this? I haven't dared to investigate what's happening any closer in case I mess it all up but it kinda looks as though seeds have germinated and started to grow right from the flower. Which bearing in mind the wet weather we've had recently I guess could be a possibility. Or are there teeny bulbils down there? Could it be because it's crossed with the White Lisbon onion and the resulting seed has a mind of its own? Or is this behaviour perfectly normal and I just haven't noticed before because I don't usually grow onions with flowers.

My walking onions do that.  I don't know why a normal onion would. Looks nifty.