Name: Sandy B. Ford River Twp, Michigan UP (Zone 4b) (Zone 4b-maybe 5a)
"Maybe some tree seeds got implanted?"
Could be... are there any trees or shrubs nearby with similar-looking leaves? You could also try posting your photo on the Plant ID forum -- maybe someone there can identify it for you
“Think occasionally of the suffering of which you spare yourself the sight." ~ Albert Schweitzer C/F temp conversion
