This is one of the best books available for identifying wildflowers. It thoroughly covers all of the Northeastern U.S. and Southeastern Canada. It goes West to Minnesota and south to Tennessee and Virginia.
It uses a unique 5 step process to identify any wildflower. The system uses flower type, followed by plant type and leaf type to zero in on the identification of any species. There are visual examples for every step of the process. Superb illustrations help to confirm the ID.
It will take a little effort by the user to learn the system, but once learned, an identification is quickly and accurately accomplished.
I highly recommend this guide to anyone that wants to identify wildflowers.
I own many wildflower books for identifying North American wildflowers, but I always land up using my Newcombs, and why? If you have a flower but don't know where to start, the Newcombs walks you through until you can identify it. It starts with color, then number of petals, then type of leaf, etc. It's absolutely wonderful for identifying wildflowers. I have given it as a gift to many friends who have been equally enthusiastic. Of course, if the wildflower isn't in bloom, look elsewhere for a guide!