- Niehaus, T. F.
- Ripper, C. L.
Publisher/JournalHoughton Mifflin Company
NotesJournal Reference: 432 pgs. ISBN 0395316626 Notes: descriptions and illustrations of 1492 species, excluding shrubs and trees, found in the western U.S. from the Pacific coast to the western foothills of the Rocky Mountains
- Botany Documents
- Vascular Plants