A field guide to Pacific States wildflowers
Subtitle: Washington, Oregon, California and adjacent areas
By: Theodore F. Niehaus ; illustrations by Charles L. Ripper ; sponsored by the National Audubon Society, the National Wildlife Federation and the Roger Tory Peterson Institute.
Contributors: Ripper, Charles L.
Series: The Peterson field guide series -- 22.; Peterson field guide series -- 22.
Publisher: Houghton Mifflin
Published: 1976
Place of publication: Boston
Language: eng
Number of pages: 432
Subjects: Wild flowers -- Pacific States -- Identification.
Genres: Identification.
Notes: Includes index.