On stone-wall in my garden.
I'm not sure if it is this species. However, the arrangement of leaves seems similar.
The City recently purchased this little piece of land, so I went out and explored during lunch. :)
Hancock County, Maine, US
Washington County, Maine, US
Ranunculales is an order of flowering plants. Of necessity it contains the family Ranunculaceae, the buttercup family, because the name of the order is based on the name of a genus in that family. Ranunculales belongs to a paraphyletic group known as the basal eudicots. It is the most basal clade in this group; in other words, it is sister to the remaining eudicots. Widely known members include poppies, barberries, and buttercups.