Ahern, Tom USA
Andersen, Henning. Denmark
Anderson, Alan J. B. Scotland
Anderson, Alan and Shirley. USA
Barlup, Jim. USA
Barnard, Robert. USA
Beaudry, Norman. USA
Berg, Warren. USA
Berg, Warren. USA Additionals
Beutler, Eugenie. USA
Blee, Alistair J. New Zealand
Blumhardt, O. New Zealand
Boland, Todd. USA
Brack, Werner. USA = zone 7
Brack, Werner. USA Additionals
Bruso, Joe. USA = zone 5B
Cavender, Richard : (Red's Rhodies). USA
Chernut, Jim. USA
Chernut, Jim. USA
Bruce Clyburn, Canada
Colombel, Marc. France
Peter Cox, Scotland
Cordy, Earl W. USA
Doi, Yasuyuki, Japan
Doppel, John. USA
Eiberg, Hans. Denmark
Emerson, Gordon. USA
Emmerich, Bob. USA
Farbarik, John. USA
Fujioka, Frank. USA
Furman, Bob. USA
Gehnrich, Bud. USA = zone 7
Gilkey, Russell. USA
Glassman, Allan. USA
Gray, George. USA
Grinevicius, A. Canada
Tommy Johansson, Sweden
Gross, Dr. Kenneth W. USA = zone 5
Hartman, Rosemary D. USA
Harvey, Joe. Canada
Helm, Henry R, USA
Higgerson, Clyde W. USA
Higgerson, Clyde W. USA Additionals
Horner, Tom. USA
Ishida, Shin' ichi. Japan
Jenkins, Ewin B. USA = zone 5
Jensen, Peder Hjorth. Denmark
Jensen, Peder Hjorth. Denmark Additionals
Clive Justice, Canada
Tommy Johansson, Sweden
Kline, Howard R. USA
Larus, Charles. USA
Leijdens, M. The Netherlands
Hirokazu Maehara, Japan
McCullough, Mike. USA
Meltzer, Hanns Germany
Tom Milner, USA
Erhard Moser, Germany
Ohazama, Hideaki. Japan
Oleri, Mary, USA
Oliver, Michael R. USA
Pflug, Gene and Margaret. USA
Jack O'Shannassy, Australia
Pohlandt, DR. Frank. Germany
Przypek, Walter. USA
Purdy, David. USA
Ronald Rabideau, USA
Rhododendron Species Foundation, USA
Rhododendron Species Foundation, Seeds from last year
Ring, Dr. Tom. USA
Roberts, Howard H. USA
Rosenthal, Jacob. USA = zone 7
Schaarup, Palle. Denmark
Henry Schannen, USA
Henry Schannen, USA additional
Shanni, Kenneth. Canada
Sinclair, June. USA
Sinclair, June. USA Additionals
Southerland, Stan. USA
Staune, Claus J. Denmark
Stein Torben. Denmark
Stewart, Francis E. USA
Stilwell,Mike. USA
Thomas, D. USA
Vestergaard, Per Houbak. Denmark
Voitk, Kaarel. Sweden
Wallace, Don S. USA
Watson, Elsie. USA
Weagle, John. Canada
Weinz, Barbara D. USA
Jack F. Wilson, Australia
Yasenchak, Ronald. USA
Yoshimura, Eizi. Japan (JRS Seed Exchange).
Zimmermann, Robert. USA