I'm Basically an Inca.

Back in, oh, I don't know, May, I planted three hydrangea bushes in the front of our house.  Because I'm so plant saavy (not) and delicate (double not), I found myself with some branches that just "fell off."  I took one of them and threw it in a mason jar with water, and some dead leaf that got in there when a ghost put it in there.

I never imagined that this would happen.

The little stem thing is even getting brown and stick-like.

(Which reminds me of a joke one of my coworkers told me that's so stupid that it's awesome.  Q: "What's brown and sticky?" A: "A stick!")

But here's the thing.  I don't know what to do with it now.  Any suggestions?