"Updated for the first time in decades, this unparalleled reference work is the most comprehensive and authoritative guide to the wildflowers of North America, reflecting the impact of climate change and the advancements in DNA studies that have radically altered the classification process--from the creators of the world's most trusted field guides, a go-to source for millions of nature lovers. This handsome volume 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"-- Provided by publisher.