A delicate parasol of tiny white flowers is punctuated at the center with one that is dark purple. This is Queen Anne’s lace, or Daucus carota.
Though the plant looks a lot like poison hemlock, Queen Anne’s lace is actually edible–its other name is wild carrot. The roots are eaten cooked, or roasted for a coffee substitute, while the seeds are used as a flavoring. I personally have been too squeamish to try it, though the subtle details of the two plants are very different. First there is the central purple bloom. Second, wild carrot has a green stem stippled with hairs (while poison hemlock has a mottled and whitish stem).
This non-native plant is native to Europe and Asia.