Scrophulariaceae of the central Rocky mountain states
By: by Francis W. Pennell.
Series: Smithsonian institution. United States National museum.  Contribuitons from the United States National herbarium.; v. 20, pt.9
Publisher: Govt. print. off.
Published: 1920
Place of publication: Washington
Language: eng
Number of pages: 381
Subjects: Scrophulariaceae -- Rocky Mountain  Region
Notes: Also considered as Contribution from the New York botanical garden, no. 219.