Below is a scan of a similar group of blossoms.
Fun! Let us crop and zoom in. According to USDA it is related to the aster family. But the blossoms are truly exotic and complex. It grows well at the edges of woods and in sunny meadows throughout the eastern portions of North America.
They almost look if they have been constructed from bits and bobs rather than opened from buds. Yet if you really look closely:
...missed this guy, guess it is now time to take this blossom back outside!