Here are some of the pictures of this plant: http://www.flickr.com/photos/76284694@N02/7335223464/in/photostream http://www.flickr.com/photos/76284694@N02/7335224052/in/photostream http://www.flickr.com/photos/76284694@N02/7335224436/in/photostream http://www.flickr.com/photos/76284694@N02/7335225224/in/photostream http://www.flickr.com/photos/76284694@N02/7335224682/in/photostream Location = Michigan
Pretty sure it's White or yellow sweet clover (Melitotus alba, M. officinalis) http://www.dnr.state.mn.us/invasives/terrestrialplants/herbaceous/whitesweetclover.html