http://rosebayblog.blogspot.com/2011/08/rhododendron-calendulaceum-smoky.html

H: Saturday, August 20, 2011

Rhododendron calendulaceum 'Smoky Mountaineer' is a Tetraploid

Rhododendron calendulaceum 'Smoky Mountaineer' 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.

Summary of Ploidy Levels

Tetraploid Rhododendron calendulaceum,
Tetraploid Rhododendron calendulaceum var. croceum,
Tetraploid Rhododendron calendulaceum 'Cherokee',
Tetraploid Rhododendron calendulaceum 'Smoky Mountaineer'

Source: Arnold Arboretum Accession Number: 22690

John and Sally Perkins
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