Nancy, Digit and Skybird - you were right!
I asked what the heck was the weedy plant taking over my flower beds and you all said a campanula and sure enough that is what it is. I see it getting taller and taller. I did as suggested and painted the leaves with Roundup. Most of them are dead or dying. I am sure I'll be doing this regularly, but I guess that is just part of gardening.
Thanks to you all for your help.