Two deciduous azalea hybrids in Audra State Park, West Virginia have been determined to be triploids 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.
Audra State Park in West Virginia contains Rhododendron arborescens, Rhododendron maximum, Rhododendron periclymenoides, maybe
Rhododendron prinophyllum, and Rhododendron calendulaceum.
Summary of Ploidy Levels
Diploid Rhododendron arborescens,
Diploid Rhododendron maximum,
Diploid Rhododendron periclymenoides,
Diploid Rhododendron prinophyllum,
Triploid 2 deciduous azalea hybrids in Audra State Park,
Tetraploid Rhododendron calendulaceum
Source: Audra State Park, West Virginia
John and Sally Perkins