The most comprehensive and authoritative guide to the wildflowers of North America， updated for the first time in decades to reflect the impact of climate change and the advancements in DNA studies that have radically altered the classification process。

This handsome volume， from the world's most trusted name in nature field guides， is the result of a collaboration among leading scientists， scholars， taxonomic and field experts， photo editors， and designers。 An indispensable resource， it covers 853 species of wildflowers， with nearly 5，200 full-color photographs。

For ease of use， the book includes a glossary， an index， and a ribbon marker， and is organized according to the latest Angiosperm Phylogeny Group IV classification system。 Each species features up to five vibrant photographs， to aid with identification， along with notes on range， season， flowers， stems， fruit， conservation status， and more。 Introductory essays give in-depth explanations of each part of a wildflower， and discuss nomenclature， invasive species， and the impacts of our changing climate。

Whether preparing for a scenic hike or getting to know the flowers in the backyard， readers will come to rely on this work of remarkable breadth， depth， and elegance。 It is a must-have reference for the library of any nature lover， and is poised to become the number-one guide in the field。