LIST OF AUTHORS' AFFILIATIONS 



1. Oswald Tippo, Eaton Professor and Chairman, Department of Botany, Yale Uni- 



versity, New Haven, Connecticut 



2. Bernard S. Meyer, Professor and Chairman, Department of Botany and Plant Pathol- 



ogy, Ohio State University, Columbus, Ohio 



3. Kenneth B. Raper, Professor of Bacteriology and Botany, Department of Bacteriology, 



University of Wisconsin, Madison, Wisconsin 



4. James G. Horsfall, Director, Connecticut Agricultural Experiment Station, New Haven, 



Connecticut 



5. Elvin C. Stakman, Professor Emeritus, University of Minnesota, St. Paul, Minnesota, 



and Special Consultant in Agriculture, Rockefeller Foundation 



6. Katherine Esau, Professor of Botany, University of California, Davis, California 



7. Vernon I. Cheadle, Professor and Chairman, Department of Botany, University of 



California, Davis, California 



8. Edmund W. Sinnott, Professor Emeritus, Department of Botany, and Dean Emeritus 



of the Graduate School, Yale University, New Haven, Connecticut 



9. Ralph E. Cleland, Professor and Chairman, Department of Botany, and Dean of the 



Graduate School, Indiana University, Bloomington, Indiana 



10. 0. J. Eigsii, Professor, Department of Natural Sciences, Chicago Teachers College, 



Chicago, Illinois 



11. G. Ledyard Stebbins, Professor of Genetics, University of California, Davis, California 



12. Reed C. Rollins, Asa Gray Professor of Systematic Botany, and Director, Gray 



Herbarium, Harvard University, Cambridge, Massachusetts 



13. Bassett Maguire, Curator and Coordinator of Tropical Research, New York Botanical 



Garden, New York, N.Y. 



14. Edgar Anderson, Missouri Botanical Garden, St. Louis, Missouri 



15. Stanley A. Cain, Professor and Chairman, Department of Conservation, University of 



Michigan, Ann Arbor, Michigan 

 Gustavus M. de Oliveira Castro, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil 

 /. Mur(a Pires, Instituto Agronomico do Norte, Belem, Brazil 

 Nilo Tomas da Silva, Instituto Agronomico do Norte, Belem, Brazil 



16. E. Lucy Braun, Professor Emeritus of Plant Ecology, University of Cincinnati, Cin- 



cinnati, Ohio 



17. R. H. Whittaker, Department of Biology, Brooklyn College, Brooklyn, New York 



18. Paul B. Sears, Chairman, Conservation Program, and Professor of Botany, Yale Uni- 



versity, New Haven, Connecticut 



19. A. G. Norman, Professor of Botany, and Director, Botanical Gardens, University of 



Michigan, Ann Arbor, Michigan 



20. William J. Robbins, Director Emeritus, New York Botanical Garden, and Professor 



of Botany, Columbia University, New York, N.Y. 



