We will be rolling out several small fixes mid-day today (Jan 29.) We do not anticipate any disruptions or problems, but f you spot any unexpected issues after 12 noon (PST), please report them in the designated thread in the DG Site Updates forum.
Aha! Folks on the Plant ID forum agreed it was some type of Campanula, and one said Campanula Elizabeth. As soon as I read "Campanula," I knew it had come from my daughter Stacy (sstateham on DG), I remembered her talking about them, and she has given me quite a few plants, mostly perennials. I called her and it's Campanula Elizabeth. It's in almost total shade with about 2 hours of morning sun, and seems to be reseeding itself there among the hardy begonias.
Now I know! I think I'll try to start some of it in another shady area on the north side and see how it does. Thanks!