OSU Extension Catalog publications are current, peer-reviewed learning materials backed by research. Catalog publications undergo rigorous peer review and are periodically checked for accuracy and timeliness. The Catalog is an active and growing resource in a variety of media.
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Featured publication
Trees to Know in Oregon and Washington
70th anniversary edition! This Northwest classic is updated and expanded for a new generation of readers. Get the details on native conifers, broadleaved trees and more than 50 ornamentals — plus range maps and easy-to-follow identification keys!