I obviously planted this last year and have no idea what it is. I have looked in books and cannot find it. It looks like a geranium by the leaves, a bit. They are little yellow flowers that fall off at night and more bloom the next day.
I went to the link and I think that is it. The seed pods look exactly the same and so do the leaves. I sure do not remember planting it!!! Thank you for your help. This has been bugging me all summer. These plants sure have lots of seeds in those pods!!!