- Elton F. Paddock, Herbert T. Scofield, John N. Wolfe, Adolph Edward Waller, Anna E. Waller, Bernard S. Meyer, C. A. Swanson, C. W. Ellett, Clarence E. Taft, Clyde Harold Jones, D. M. McLean, Edgar Nelson Transeau, Eugene B. Wittlake, Folke Johnson, Frederick G. Dickason, Glenn W. Blaydes, Lois Lampe, Ohio State University. Department of Botany, Royal E. Shanks, Grace Ann Stewart, Lawrence E. Yarman
· 1933
- Adolph E. Waller, Bernard S. Meyer, Clarence E. Taft, Clyde Harold Jones, Edgar Nelson Transeau, Elbert H. Ahlstrom, Elizabeth Sloane Bretz, Floyd Alonzo McClure, Glenn W. Blaydes, Helen Jean Brown, John Henry Schaffner, Lawrence E. Hicks, Lewis Hanford Tiffany, Mary Stump Taylor, Ohio State University. Department of Botany, R. T. Wareham, Ralph Orlando Freeland, Richard Allen Popham, Robert Benson Gordon, S. S. Humphrey, Don S. Rader
· 1933
- Glenn W. Blaydes, R. H. Böhning, William Anderson Kendall, William D. Gray, Margaret B. Heaslip, A. J. Linck, Allen S. Fox, Blair Ferdinand Janson, C. A. Swanson, C. N. Sun, C. W. Ellett, Calvin C. Kuehner, Carl E. Hendrickson, Carlos O. Miller, Clarence E. Taft, Clyde Harold Jones, Donald E. Davis, Donald R. Geiger, Edgar Nelson Transeau, Eduard Stadelmann, Gareth E. Gilbert, H. R. DeSelm, Harlan Ross Christy, James R. Troyer, John N. Wolfe, Lesley Ernestine Hayes, Lois Lampe, Patricia A. Langel, R. W. Shuel, Richard Allen Popham, Stuart Batterson Hughes, Theodore William Sudia, Thomas D. Brock, William H. Brandt, Ohio State University. Department of Botany, Allan Poe Chan, Bernard S. Meyer, Bhakdi Lusanandana, L. V. Domm, T. J. Johnson
· 1948
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