Creator
- American Rhododendron Society1
- Bloom, Joseph D.1
- Borissow, Kyrill1
- Carpenter, William T.1
- Chesse, Ralph 1
- Dodge, Harrison Howell, 1852-19371
- Farrand, Robert William, 1934-1
- Friedman, Herbert, 1924-20061
- Hirschfeld, Robert M. A.1
- Hopkins, William H. (William Hugh), 1942-1
- Keith, Samuel J.1
- Kertész, André, 1894-19851
- Kleyman, Felix, Dr.1
- Kovalev, A. A. (Andreĭ Anatolʹevich)1
- Mann, Charles Harrison, Jr., 1908-1977 1