A great resource for native plant enthusiasts, biologists, ecologists, conservationists, and amateur naturalists who desire a comprehensive, up-to-date, and well-illustrated book for identifying plants in the Pacific Northwest. This is the definitive guide to the rich and varied plant life of the region, from the ocean shores to the crest of the Cascades, from British Columbia south through the Klamath Mountains of southwestern Oregon and the Siskiyou Mountains of northwestern California. Its botanical coverage is complete, with plants native to the region as well as those that have been introduced, either intentionally or as weeds, and that have become naturalized. More than 2,500 species are included, with user-friendly keys and more than 700 color photographs and 350 line drawings to facilitate successful identification.