A great resource for botanists, native plant enthusiasts, ecologists, conservationists, and amateur naturalists who desire a comprehensive, up-to-date, and well-illustrated book for the identification of plants of the Pacific Northwest. This is the definitive guide to the rich and varied plant life of the region, from the ocean shore to the crest of the Cascades, from British Columbia south through the Klamath Mountains of southwestern Oregon and the Siskiyous in northwestern California. Its botanical coverage is complete, including plants native to the region as well as those that have been introduced and become naturalized. More than 2500 species are fully described, with user-friendly keys and more than 700 color photographs and 350 line drawings to facilitate successful identification.