Rhododendron 'Canobie Candy', which is very likely a Rhododendron canescens hybrid seedling raised by Sally and John Perkins, 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.
Rhododendron canescens was determined to be a diploid.
Summary of Ploidy Levels
Diploid Rhododendron canescens,
Diploid 'Canobie Candy'
Source: John and Sally Perkins
John and Sally Perkins
