Now this is Bobbys favorite book. He has had one of the originals from copyright 1979. He carried it for years. Wore it out. Bought the newer version but not as good as this older version. Every wildflower imaginable in this resource field guide. Definitely considered a field guide literally for us. If you can ever get a copy, you would never regret it. WONDERFUL!!!
I take this into the yard and fields and have been able to identify almost everything I've tried to. Part 1 of the book are color photographs [638 of them] which are beautifully detailed, and are divided by color groups and petal types. Part 2 of the book are Family and Species descriptions. Both parts of the book cross-reference each other.