field guide to Pacific States wildflowers
Subtitle: field marks of species found in Washington, Oregon, California, and adjacent areas , a visual approach arranged by color, form, and detail
By: text by Theodore F. Niehaus  ill. by Charles L. Ripper sponsored by the National Audubon Society andNational Wildlife Federation.
Contributors: Ripper, Charles L.
Series: The 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.
Notes: Includes index.