Poplar Vagabond Gall Aphid

I have been keeping a Question Book for years. It’s the greatest textbook I have ever owned. Each loving volume has been authored in partnership between the land and my own geysering, never-settling, curiosity. There have been many questions answered through research in my own library, the local university library, and online. For as many questions which have been answered, there are pages of unanswered mysteries. This is not for lack of searching, but perhaps the research has not come out yet, or I just don’t know where to look. Luckily today will be an indepth answer as to what the hell I have seen growing on the Poplar trees.