'Casille' is a Diploid

Rhododendron 'Casille' has been determined to be a diploid 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.

The Pastel series which includes 'Casille' is documented to contain Rhododendron alabamense, Rhododendron canescens, and Rhododendron flammeum.

Summary of Ploidy Levels

Diploid Rhododendron alabamense,
Diploid Rhododendron canescens,
Diploid Rhododendron flammeum,
Diploid 'Casille',
Diploid "Pastel #6",
Diploid "Pastel #7",
Diploid "Pastel #20"

Source: Woodlanders Nursery

John and Sally Perkins

"Pastel #20" is a Diploid

"Pastel #20" has been determined to be a diploid 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.

The Pastel series is documented to contain Rhododendron alabamense,
Rhododendron canescens, and Rhododendron flammeum.

Summary of Ploidy Levels

Diploid Rhododendron alabamense,
Diploid Rhododendron canescens,
Diploid Rhododendron flammeum,
Diploid 'Casille',
Diploid "Pastel #6",
Diploid "Pastel #7",
Diploid "Pastel #20"

Source: Woodlanders Nursery

John and Sally Perkins

"Pastel #7" is a Diploid

"Pastel #7" has been determined to be a diploid 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.

The Pastel series is documented to contain Rhododendron alabamense,
Rhododendron canescens, and Rhododendron flammeum.

Summary of Ploidy Levels

Diploid Rhododendron alabamense,
Diploid Rhododendron canescens,
Diploid Rhododendron flammeum,
Diploid 'Casille',
Diploid "Pastel #6",
Diploid "Pastel #7",
Diploid "Pastel #20"

Source: Woodlanders Nursery

John and Sally Perkins

"Pastel #6" is a Diploid

"Pastel #6" has been determined to be a diploid 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.

The Pastel series is documented to contain Rhododendron alabamense,
Rhododendron canescens, and Rhododendron flammeum.

Summary of Ploidy Levels

Diploid Rhododendron alabamense,
Diploid Rhododendron canescens,
Diploid Rhododendron flammeum,
Diploid 'Casille',
Diploid "Pastel #6",
Diploid "Pastel #7",
Diploid "Pastel #20"

Source: Woodlanders Nursery

John and Sally PerkinsDiploid 'Casille',

Rhododendron atlanticum 'Winterthur' is a Tetraploid

em>Rhododendron atlanticum 'Winterthur' 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.

Rhododendron atlanticum was also determined to be a tetraploid using flow cytometry by Dr. Thomas Ranney, J.R. Jones, and Nathan Lynch.

Summary of Ploidy Levels

Tetraploid Rhododendron atlanticum,
Tetraploid Rhododendron atlanticum 'Winterthur'

Source: Woodlanders

John and Sally Perkins

Rhododendron alabamense is a Diploid

Rhododendron alabamense 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.

Summary of Ploidy Levels

Diploid Rhododendron alabamense,
Diploid Rhododendron alabamense 'Schwinds'

Source: Connecticut College Arboretum Accession Number: 81-84-A
Source: Connecticut College Arboretum Accession Number: 85-2-A
Source: Connecticut College Arboretum Accession Number: 85-2-C
Source: Highstead Arboretum Accession Number: 94-6-L
Source: Woodlanders

John and Sally Perkins

'Harrison's Red' is a Triploid

Rhododendron 'Harrison's Red', which is a documented as Rhododendron austrinum, 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.

The ploidy results suggests that 'Harrison's Red' is a Rhododendron austrinum hybrid rather than a color form of the straight species.

Rhododendron Species Foundation lists 'Harrison's Red' under Rhododendron austrinum as follows:

1993/002 'Harrison's Red' A floriferous and easily grown deciduous azalea with slightly fragrant flowers in mid-spring. The flower color on this selection is listed as "rosy-red" but I have not recorded it in flower. Very heat tolerant, sun or shade. (-10\R1\6)

Summary of Ploidy Levels

Triploid 'Evening Sun',
Triploid 'Harrison's Red',
Tetraploid Rhododendron austrinum

Source: Woodlanders Nursery

John and Sally Perkins

Rhododendron canescens 'Clyo Red' is a Diploid

Rhododendron canescens 'Clyo Red' has been determined to be a diploid 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.

Summary of Ploidy Levels

Diploid Rhododendron canescens,
Diploid Rhododendron canescens 'Camilla's Blush',
Diploid Rhododendron canescens 'Clyo Red'

Source: Woodlanders Nursery

John and Sally Perkins