Indianapolis, zone 5. Mostly shade. Probably a wildflower, based on all the other plants in my new yard.
Pink, dead dandelion-looking petals.
Thanks in advance, you people are awesome!
Appears to be an Allium. Difficult to tell which one (can't see the leaves and the picture is a bit blurry) but perhaps A. cernuum.
The flower looks like hydrophyllum virginianum, but not the (visible) leaves.
Sort of fans out, but only one stalk/bloom that I can see.
More confident now that it is Allium cernuum.