Well, I'm 0/2 so far this season: was all excited when I stumbled across a patch of these delicate little beauties. And still am, but slightly tempered by the fact that they turned out to be another exotic species (naturalized ornamental), not a native. At least this one seems to play well with others (isn't considered invasive).
Growing in a recently-muddy spot in mature coastal deciduous woods in central NJ. Flower diameter ~3 cm, leaf length ~10 cm, leaf width ~0.5 cm. Some flowers ranged to a more intense blue.
This is a top view. More views (uploaded to aid ID):
whole plant from the side
inside of flower
with a hand for scale
Siberian squill (Scilla siberica), also known as the wood squill or spring beauty, is a small perennial plant native to Siberia.