Covers southern British Columbia, Washington, Oregon, and northern California, from the coast to the mountains and high desert, including the Siskiyou, Steens, and Wallowa mountains Describes and illustrates 1220 commonly encountered species Includes perennials, annuals, and shrubs, both native and nonnative 1248 superb color photographs, 1220 range maps, 1 ecoregions map User-friendly organization by flower color and shape Handy, authoritative trailside reference