The flower opened later in the day and Mr McGregor's Daughter was absolutely right, it's Hepatica... and I think it's more Round-Lobed (Hepatica nobilis obtusa or Hepatica americana) rather than the Sharp-Lobed. That one's also more native to our area. I don't know if it will ever get any bigger than this, it's going on 4 years now.
Aster!? Yeesh - that's the 2nd thing that was mislabeled at our native plant sale (the other was a Celandine Poppy labeled as Blue Cohosh).
I got this small flower at my first ever Native plant sale back in
However, after a few years of gardening I don't think it's an aster at all, but I still can't find anything like it to ID it.
The flower, as you can see, is an early bloomer (April) and the leaves are kind of heart shaped (there's one in the background). It's very diminutive -- either because it just is, or because it's not planted in the proper spot.