(In progress) An annotated list of wildflower books I've loved reading
I've generally chosen links to AbeBooks because I get a lot of (used) books there myself; you'll also find all the info you need to buy new.
Spring Wildflowers of the Northeast
Carol Gracie
A really engaging read. Covers only a couple of dozen wildflowers, but in fascinating breadth and depth. In some ways, an inspiration for my creating this blog. There's also a summer version, but it includes a fair number of non-natives, and I didn't find the details as interesting.
Wildflowers & Plant Communities
Of the Southern Appalachian Mountains and Piedmont
This book takes a community approach--discussing the different types of environments in its coverage area, their signature trees and wildflowers. Individual wildflower write-ups have lots of engaging details.
Wildflowers of Tennessee the Ohio Valley and the Southern Appalachians
Horn, Cathcart, Hemmerly & Duhl.
Includes great photos and the individual plant write ups share common names, origins of scientific name, and interesting tidbits about the flower.