Rhododendron 'Pearce's American Beauty', which is a Pearce hybrid documented as 'Mrs Charles S Sargent' x 'Doctor H.C. Dresselhuys', has been determined to be a triploid 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.
Rhododendron 'Pearce's American Beauty' may be fertile since the ARS Seed Exchange List contains seed from the cross 'Tooney Bird' X 'Pearce's American Beauty'
Summary of Ploidy Levels
Triploid 'Pearce's American Beauty'
Source: RareFind Nursery
Source: Kristian Theqvist
John and Sally Perkins
