Great post! Have not checked in for quite a while and just read the entire thread. It is amazing how many free edibles grow in your yard or nearby that most people are unaware of. I can walk around my yard and gather lambs quarter, dandelion, burdock; all great greens. There is also lots of purslane, just pick and eat. If I have a stomach or digestive disorder; there is always Canadian Fleabane nearby. I often just pick leaves chew thoroughly and swallow......not ver tasty but very effective....the recommended method is to make a tea of it.
I have been interested in this for many years; and just recently began a study course that I picked up from the Ancient Roots group on Yahoo. Very good infor there.