Most Popular Books
- ORCHIDS OF PANAMA. A Facsimile Reprint of the Orchidaeceae, FLORA OF PANAMA. Includes a Checklist of the Orchids of Panama as Known Today. Monographs in Systematic Botany Volume 4.
- Drug and condiment plants Agriculture handbook No. 172 Agricultural research service U.S. Department of Agriculture
- Tropical American Plants, V; Fieldiana. Botany series v. 29, no. 10
