A Catalogue of the Known Plants, (Phænogamia and Pteridophyta) of Oregon, Washington, and Idaho; (Paperback) (ISBN-13: 9781021466044)

A comprehensive catalog of the plant species found in the Pacific Northwest region of the United States, including Oregon, Washington, and Idaho. Thomas Howell's meticulous work provides information on scientific naming, location, and habitat of each species.

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