Rhododendron 'Pink Prelude', which is a Watson hybrid documented as ('Sarita Loder' x Rhododendron calophytum) x Rhododendron macabeanum, has been determined to be a diploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca Oliveira, 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 'Pink Prelude'
Source: RareFind Nursery
John and Sally Perkins
