Rhododendron 'Mrs. Lindsay Smith', which is a 1910 Koster hybrid documented as 'George Hardy' x 'Duchess of Edinburgh', has been determined to be a diploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Rhododendron 'Mrs. Lindsay Smith' is the seed parent of 'Diane'. 'Diane' is the seed parent of 'Phyllis Korn'. 'Gomer Waterer' is the pollen parent of 'Phyllis Korn'.
Summary of Ploidy Levels
Diploid 'Diane',
Diploid 'Mrs. Lindsay Smith',
Triploid 'Gomer Waterer',
Triploid 'Phyllis Korn'
Source: Van Veen Nursery
John and Sally Perkins
