Rhododendron calendulaceum "Cahas Mountain White" has been determined to be a tetraploid 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.
A population of Rhododendron calendulaceum exists on Cahas Mountain in southern Virginia that display typical calendulaceum characteristics except for having flower colors that are more pastel than those normally associated with calendulaceum.
Summary of Ploidy Levels
Tetraploid Rhododendron calendulaceum "Cahas Mountain White"
Source: John and Sally Perkins
John and Sally Perkins
