Thanks for the book recommendation, Fidelia! Judging by the plants you have been foraging, I'm guessing you must live somewhere not too far from me, here in the Southwest. (Santa Fe, here, as you know.)
One book I'm using is Wild Plants of the Pueblo Province
. This book describes use and usages of native plants used by the Pueblo people of Southwest, and their "Anasazi" ancestors. Some of the plants were used as food, others for medicine, and yet others for tools and baskets, etc. The book has its limitations, as all that I've seen do. And so I think the only thing to do for anyone with a genuine interest is to collect several or many books on the subject. One of my other guide books has simply terrible distribution maps! And this Pueblo book is good, but leaves out a lot of important details.