Books by Jason Richard Swallen:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Swallen, Jason Richard, 1903-: The awnless annual species of Muhlenbergia. (U. S. Govt. Print. Off., 1947) (page images at HathiTrust)- Swallen, Jason Richard, 1903-: Flora of Guatemala : part II: grasses of Guatemala (Chicago Natural History Museum, 1955) (page images at HathiTrust)
- Swallen, Jason Richard, 1903-: New grasses from Honduras, Columbia, Venezuela, Ecuador, Bolivia, and Brazil. (U. S. Govt. Print. Off., 1948) (page images at HathiTrust)
- Swallen, Jason Richard, 1903-: New grasses from Mexico, Central America and Surinam. (U. S. Govt. Print. Off., 1950) (page images at HathiTrust)
Find more by Jason Richard Swallen at your library, or elsewhere.