One seedling of Rhododendron 'Nancy Evans' x 'Point Defiance', which was raised by Ned Brockenbrough, has been determined to be a tetraploid 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.
Summary of Ploidy Levels
Diploid 'Nancy Evans'
Tetraploid 'Point Defiance'
Tetraploid 1 Seedling of 'Nancy Evans' x 'Point Defiance'
Source: Ned Brockenbrough
John and Sally Perkins
