Rhododendron 'Anita Gehnrich', which is a Bud Gehnrich hybrid documented as 'The Honorable Jean Marie de Montague' X R. degronianum ssp. yakushimanum, 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 'The Honorable Jean Marie de Montague', although a diploid, is documented as the parent of several triploids indicating 'The Honorable Jean Marie de Montague' may throw more unreduced gametes than most diploids.
Rhododendron 'Solidarity', which is documented as having the reversed parents of 'Anita Gehnrich', is also a triploid.
Summary of Ploidy levels
Diploid 'The Honorable Jean Marie de Montague',
Triploid 'Anita Gehnrich',
Triploid 'Solidarity'
Source: Werner Brack
John and Sally Perkins
