For foraging plants i have 4 books that I relay on.
1. Field Guide to Edible Wild Plants by Bradford Angier has good color drawings to help with ID also has some ways to eat them.
2.Edible Wild Plants of Eastern north America by Merritt L Fernald and Alfred C Kinsey uses black and white drawings and photos. good written descriptions.
3. The Complete Guide To Edible Wild Plants, Mushrooms, Fruit and Nuts by Katie L Lyle
uses black and white drawings and some color photos.
4. Field Guide to North American Edible Wild Plants by Thomas S Elias and Peter A Dykeman lots of color photos, range maps etc.
Unless I am sure of what I am gathering I try to verify what something is in as many of these books as I can. I have other books that cover a broader area so I am less likely to get a positive id from them. They just do not have the room to include everything so it is always best to try to see if there is a local book. But we make do with what we have.
Jim