Here are descriptions and illustrations of 1,492 species from 77 families - virtually all of the wildflowers found from British Columbia to Baja California, from the Rocky Mountains to the Pacific Ocean. Grouped by color, each species description includes field marks, size, habitat, range, flowering season, and common and scientific names.
This is an excellent summary guide to the wildflowers of the western states. I started botanizing with this guide, and I still use it to keep notes of new species I find (though I now use the much larger Jepson Manual for keying out California species). On a personal note, my wife and I met 30 years ago while backpacking in the high Sierra's. One way that we knew we were "meant for each other" was that we both loved & utilized this field guide extensively! Try it; perhaps you too will meet the love of your life by using this book!