One of my favorite books in the entire world is "Weeds of the North Central States". I have an exceptionally long commute and 65 mph weed identification is something more than a pastime.
However, the most it says about the use of the plants is, "not good for forage". And I'm not particularly interested in forage, nor is it within the scope of this website. What I'd like is a good complete resource for the identification of beneficial 'weeds'.
I have to restrict this question to the Midwest, but if there was a twenty volume tome which had a little section on the Midwest, that'd be great too.