okay, my last one (for now), I promise! So sorry to have so many at once.

I've looked and looked at this one. At first I thought it was just part of the hydrangea, but I think it is separate and a little different. I wonder if it is a tree of some kind that seeded in the hydrangea? I know I get a lot of Rose of Sharon seeding in that area from a neighbor's tree. Does it look like it might be ROS? or something else? Or am I crazy, and it's just a part of the hydrangea?