Silly Saturday 102

I am blipping this very silly plant for Admirer's Silly Saturday challenge.  I have no idea what it is, have tried to identify it, but without success.  It is another surprise plant that just appeared in one of the hanging baskets. It is now enormous, The stem at it's  base is.square-ish and one inch across which means about four inches round.  The largest leaves measure (yes I took a tape measure out) twelve inches from top to tip.  Then it's crowning glory is this SILLY LITTLE FLOWER right at the top. All that effort to produce such a large plant that it just gave up when it came to the flower, and thought :-
 "oh blow it, that'll do, I can't be bothered any more"..
If anyone of you clever people know what it is, please put me out of my misery and tell me.
Thank you admirer for hosting.