The Catalog is the source for current, peer-reviewed, research-based learning materials published by OSU Extension. It is an active and growing resource, with learning materials in a variety of media for use in a variety of outreach and engagement activities and programs.
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NEW! 70th Anniversary Edition! For 70 years, people have turned to one book to learn about Northwest trees. This edition expands its scope, covering even more species of trees — including several rare species native to southwest Oregon. It also updates scientific names and adds a new section on how Northwest forests are likely to be affected by changing climates. Along with all the details on native conifers, broadleaves and more than 50 ornamental trees, readers will find:
