A plant at the Arnold Arboretum labeled Rhododendron 'Graf von Meran', which is a 1858 J. Rinz Ghent hybrid, has been determined to be a triploid 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 'Graf von Meran' was determined to be a tetraploid using flow cytometry by Tom Eeckhaut.
Summary of Ploidy Levels
Triploid 'Bronze Unique',
Triploid 'Daviesii',
Triploid 'Deep Rose',
Triploid 'Gloria Mundi',
Triploid 'Graf von Meran' at Arnold Arboretum,
Triploid 'Josephine Klinger',
Tetraploid 'Graf von Meran' by Eeckhaut
Source: Arnold Arboretum Accession Number: 7101
John and Sally Perkins
