Creator
- American Rhododendron Society1
- Bloom, Joseph D.1
- Borissow, Kyrill1
- Carpenter, William T.1
- Edward G. Sharp 1
- Farrand, Robert William, 1934-1
- Friedman, Herbert, 1924-20061
- Gardner, Thomas N.1
- Hirschfeld, Robert M. A.1
- Hopkins, William H. (William Hugh), 1942-1
- Keith, Samuel J.1
- Kleyman, Felix, Dr.1
- Kovalev, A. A. (Andreĭ Anatolʹevich)1
- Mercer, Ellen Robertson1
- Monahan, John (John Thomas), 1946-1