Rhododendron dilatatum 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.
Although the sample we tested was labeled as Rhododendron dilatatum forma leucanthum the flowers were not white.
Summary of Ploidy Levels
Diploid Rhododendron dilatatum forma leucanthum
Source: Arnold Arboretum Accession Number: 209-87
John and Sally Perkins
