Key to the Rocky Mountain flora
Subtitle: Colorado, Utah, Wyoming, Idaho, Montana, Saskatchewan, Alberta, and parts of Nebraska, South Dakota, North Dakota, and British Columbia
By: by P. A. Rydberg...
Publisher: The author
Published: 1919
Place of publication: New York
Language: eng
Number of pages: 305
Subjects: Botany -- Rocky Mountains.
Notes: A reprint of the keys and glossary found in the author's Flora of the Rocky Mountains and adjacent plains, 1917. cf. Pref.