I've read that goats love it and that the gout in goutweed is a corruption of goat. Needless to say, I don't love it. It magically appeared in my back garden space around five years ago through the fence dividing my yard from the neighbor's. One year I had a nice young man dig it all up and sift out the roots. It came back. I've been pulling and sifting for roots ever since.
MizEllie and her Service Dog, MaeMae
Zone 4, NW Wisconsin
My immediate thoughts are Strawberry. The stems are all wrong for flat leafed parsley. Does it travel with runners? If so that would anchor strawberry. Goutweed is not as prostrate as this appears to be.
The real world is bizarre enough for me...Blue Oyster Cult