What Is It?

I was walking along Murray Street in the Byward Market area of Ottawa when I suddenly saw this...thing? object? whatever - in a little park. I had to stop and take some pictures because it was so strange. There was a crude sort-of statue of a man all made out of green plants (I think), and it was draped with plastic flowers and had a brightly painted tree stump in front. The whole thing was in a kind of cage.  

This is another view of the whatever-it-is. I thought it might be some sort of avant-garde sculpture, but there were no signs anywhere to identify it or explain why it is there. Such a mystery! Any ideas what it might be?