Boucher, D. H. (1983). Species Accounts: Quercus oleodes (Rable Encina, Oak). Costa
Rican Natural History. D. H. Janzen (ed.) The University of Chicago Press.
Boucher, D. H., Hansen, M., Risch, S., and Vandermeer, J. H. (1983). Agriculture. Costa
Rican Natural History. D. H. Janzen (ed.) The University of Chicago Press.
Chavarría, U., González, J., and Zamara, N. (2001). Arboles comunes del Parque
Nacional Palo Verde (Common Trees of Palo Verde National Park). Instituto Nacional de
Biodiversidad (INBio).
Gill, D. E. (1998). The Flowering Plants of Palo Verde National Park Guanacaste
Province, Costa Rica. University of Maryland.
Hartshorn, G. H. (1983). Plants. Costa Rican Natural History. D. H. Janzen (ed.)
The University of Chicago Press.
Pohl, R. W. (1983). Species Accounts: Hyparrhenia rufa (Jaragua). Costa Rican
Natural History. D. H. Janzen (ed.) The University of Chicago Press.