'Manitou' is a Diploid

Rhododendron 'Manitou', which is a Nearing hybrid documented as a 'Conestoga' hybrid, 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 minus,
Diploid Rhododendron racemosum,
Diploid 'Manitou',
Diploid 'Windbeam'

Source: John and Sally Perkins

John and Sally Perkins

'Windbeam' is a Diploid

Rhododendron 'Windbeam', which is a 1934 Nearing hybrid documented as a 'Conestoga' hybrid, 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.

In 1977 at Breeders Roundtable in Eugene, Oregon, Ellis Jones presented several reasons he suspected that 'Windbeam' was a triploid. In 1979, Gustav A. L. Mehlquist reported that 'Windbeam' was fertile.

Summary of Ploidy Levels

Diploid Rhododendron minus,
Diploid Rhododendron racemosum,
Diploid 'Manitou',
Diploid 'Windbeam'

Source: RareFind Nursery

John and Sally Perkins

'Bluenose' is a Triploid

Rhododendron 'Bluenose', which is a Brueckner hybrid documented as Rhododendron dauricum var. sempervirens X 'Russautinii' 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.

Summary of Ploidy Levels

Diploid Rhododendron dauricum,
Triploid 'April Rhapsody',
Triploid 'Bluenose',
Triploid 'Purple Gem',
Tetraploid Rhododendron augustinii

Source: RareFind Nursery

John and Sally Perkins

Reminder: Rhododendron Walk Hort Farm @ Sat Jun 4 10am - 12pm (John Perkins)

more details » Rhododendron Walk Hort Farm June 11, 2011 10 A.M. to Noon Rhododendron Walk and Talk with Hal Bill, Collection Curator. A great opportunity to tour the Rhododendrons and Eastern U.S. Native Azalea collections in bloom. These "Jewels in the Crown" are one of best collections in New England. This event takes place at Friends of Hort Farm in Burlington, VT. When Sat Jun 4 10am – 12pm Eastern Time Where Friends of Hort Farm, Burlington, VT (map) Calendar John Perkins Who • John.A.Perkins@gmail.com - creator

Invitation from Google Calendar You are receiving this email at the account john.a.perkins@gmail.com because you set a reminder for this event on the calendar John Perkins. You can change your reminders for specific events in the event details page in https://www.google.com/calendar/.

'April Rhapsody' is a Triploid

Rhododendron 'April Rhapsody', which is a Allan and Shirley Anderson hybrid documented as 'April Gem' x 'Vibrant Violet', 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.

Summary of Ploidy Levels

Diploid Rhododendron dauricum,
Diploid Rhododendron minus,
Triploid 'April Rhapsody',
Triploid 'Bluenose',
Triploid 'Purple Gem',
Tetraploid Rhododendron augustinii

Source: RareFind Nursery

John and Sally Perkins

Arnold Arboretum Living Collection

Our ploidy research has included the testing of samples from the Living Collection of the Arnold Arboretum.

The "In The Collections" web page of the Arnold Arboretum includes a reference to our ploidy research.

John and Sally Perkins

'Caramou' is a Diploid

Rhododendron 'Caramou', which is a Hardgrove hybrid documented as Rhododendron minus Carolinianum Group x Rhododendron moupinense, 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 minus,
Diploid 'Caramou'

Source: RareFind Nursery

John and Sally Perkins

'Isola Bella' is a Diploid

Rhododendron 'Isola Bella', which is a Brueckner hybrid documented as (Rhododendron dauricum 'Arctic Pearl' selfed) X Rhododendron fletcherianum 'Yellow Bunting', 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 dauricum,
Diploid 'Isola Bella'

Source: RareFind Nursery

John and Sally Perkins

'Lemon Twist' is a Diploid

Rhododendron 'Lemon Twist', which is a Rokuyo hybrid documented as Rhododendron keiskei var. ozawae x Rhododendron lutescens 'Bagshot Sands', 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 keiskei,
Diploid 'Lemon Twist'

Source: RareFind Nursery

John and Sally Perkins

'Dora Amateis' is a Diploid

Rhododendron 'Dora Amateis', which is a Amateis hybrid documented as Rhododendron minus var. minus x Rhododendron ciliatum, 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 minus,
Diploid 'Dora Amateis',
Diploid 'Pink Magic'

Source: RareFind Nursery

John and Sally Perkins

'Pink Magic' is a Diploid

Rhododendron 'Pink Magic', which is a Augie Kehr hybrid documented as Rhododendron minus var. chapmanii x Rhododendron ciliatum pink form, 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 minus,
Diploid Rhododendron minus var. chapmanii,
Diploid 'Dora Amateis',
Diploid 'Pink Magic'

Source: RareFind Nursery

John and Sally Perkins

'Purple Gem' is a Triploid

Rhododendron 'Purple Gem', which is a Guy Nearing hybrid documented as Rhododendron minus Carolinianum Group x Rhododendron fastigiatum, 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.

Summary of Ploidy Levels

Diploid Rhododendron minus,
Triploid 'April Rhapsody',
Triploid 'Bluenose',
Triploid 'Purple Gem',
Triploid 'Ramapo',
Triploid 'Ramolet'

Source: John and Sally Perkins

John and Sally Perkins

Rhododendron hippophaeoides 'Silver Blue' is a Diploid

Rhododendron hippophaeoides 'Silver Blue' 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 hippophaeoides 'Silver Blue'

Source: RareFind Nursery

John and Sally Perkins

Poster of Rhododendron Ploidy Research

A poster entitled


"Ploidy level estimations in deciduous and elepidote hybrids of Rhododendron" José M. Oliveira, Mariana Castro, Francisco Nascimento, Sílvia Castro, John Perkins, Sally Perkins, and João Loureiro

was prepared for

XXXVI Jornadas Portuguesas de Genética
Departamento de Ciências da Vida
Universidade de Coimbra
30 de Maio a 1 de Junho de 2011

John and Sally Perkins

'Pearce's American Beauty' is a Triploid

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

Reminder: Plant Sale and Demonstrations at Weston Nurseries @ Sat May 21 9am - 1pm (ARS Massachusetts Chapter Calendar)

more details » Plant Sale and Demonstrations at Weston Nurseries Plant Sale and Demonstrations When Sat May 21 9am – 1pm Eastern Time Where Weston Nurseries Hopkinton MA (map) Calendar ARS Massachusetts Chapter Calendar Who • John Perkins - creator

Invitation from Google Calendar You are receiving this email at the account john.a.perkins@gmail.com because you are subscribed for reminders on calendar ARS Massachusetts Chapter Calendar. To stop receiving these notifications, please log in to https://www.google.com/calendar/ and change your notification settings for this calendar.

Rhododendron groenlandicum is a Tetraploid

Rhododendron groenlandicum has been determined to be a tetraploid 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 groenlandicum was formerly classified as Ledum groenlandicum.

Summary of Ploidy Levels

Diploid Rhododendron columbianum,
Diploid Rhododendron subarticum,
Diploid Rhododendron subulatum China,
Tetraploid Rhododendron diversipilosum,
Tetraploid Rhododendron diversipilosum 'Milky Way',
Tetraploid Rhododendron groenlandicum,
Tetraploid Rhododendron groenlandicum Saco Bog, Maine,
Tetraploid Rhododendron hypoleucum,
Tetraploid Rhododendron neoglandulosum,
Tetraploid Rhododendron tolmachevii,
Tetraploid Rhododendron tomentosum Turku Archipelago

Source: Bartlett Arboretum
Source: Saco Bog, Maine (John and Sally Perkins)
Source: Kristian Theqvist

John and Sally Perkins

The Research Team

Mariana Castro

José Cerca Oliveira

Dr. Silvia Castro

Dr. João Loureiro

To date over 500 Rhododendron and azalea samples, of which over 300 have been determined to be polyploids, have been tested for ploidy 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.

John and Sally Perkins

Rhododendron augustinii Berg is a Tetraploid

Rhododendron augustinii Berg form has been determined to be a tetraploid 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

Tetraploid Rhododendron augustinii Berg form

Source: RareFind Nursery

John and Sally Perkins

Rhododendron diversipilosum 'Milky Way' is a Tetraploid

Rhododendron diversipilosum 'Milky Way' has been determined to be a tetraploid 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 diversipilosum was formerly classified as Ledum palustre var. diversipilosum.

Summary of Ploidy Levels

Diploid Rhododendron columbianum,
Diploid Rhododendron subarticum,
Diploid Rhododendron subulatum China,
Tetraploid Rhododendron diversipilosum,
Tetraploid Rhododendron diversipilosum 'Milky Way',
Tetraploid Rhododendron groenlandicum,
Tetraploid Rhododendron groenlandicum Saco Bog, Maine,
Tetraploid Rhododendron hypoleucum,
Tetraploid Rhododendron neoglandulosum,
Tetraploid Rhododendron tolmachevii,
Tetraploid Rhododendron tomentosum Turku Archipelago

Source: RareFind Nursery
Source: Kristian Theqvist

John and Sally Perkins

Ploidy Research on Rhododendrons

For those interested in the ploidy research being done on Rhododendrons in cooperation with the University of Coimbra click the links below:

Ploidy Results

Research Team

Ploidy Presentation

Summary of Ploidy Results

John and Sally Perkins

Mass Chapter ARS Demo Correction

Correction to yesterday's communication:

The Pruning Demo at Weston on Saturday, May 21 will start at 12:00 noon and end at 2:00 PM.

 

Joe

 

In a message dated 5/15/2011 11:16:19 A.M. Eastern Daylight Time, Jpbruso@aol.com writes:

Next weekend, May 21 & 22, the Mass Chapter ARS will have our annual Sale and Show.  We are splitting this year's events between two venues: 

• Main Plant Sale at Weston Nurseries, Hopkinton MA - May 21 (Sat)
• Truss Show (and smaller plant sale) at Elm Bank - May 22 (Sun)

Details are in the latest Newsletter.  

There have been some recent additions however that are being communicated here.

 

Weston Nurseries Events, Saturday, May 21

 

Demo & Presentation/Discussion

CJ Patterson will give two demos/presentations at Weston Nurseries:

• 11:00 AM - Pruning Rhododendrons & Azaleas
• 12:00 Noon - 2:00 PM - Plant Doctor Clinic.  Bring your questions and problems with you to obtain solutions. 

Mini-Truss Display

Several people have expressed an interest in bringing trusses and/or choice foliage to Weston to complement the plant sale and demos.  Therefore we will have tubes, blocks and index cards on-hand for use by volunteers and other chapter members who bring trusses for a non-judged display.  These do not necessarily have to be "show quality" specimens or meet the rules of the formal show (to be held the next day).  All are encouraged to bring something.  Tables will be set up in the greenhouse attached to the back of the Weston garden center.  This is also where the Sale and demos will be held.  Signs will point the way from the front of Weston Nurseries.

 

Plant Sale Details

The main Plant Sale will occur at Weston Nurseries in Hopkinton.  This sale will contain plants from several sources, ranging in size from 4" plants through larger, multi-gallon size.  It will include choice hybrids as well a species and foliage plants, rhododendrons, evergreen and deciduous azaleas.  Plants not sold at Weston will be transported to the Elm Bank Society Row sale the next day (Sunday, May 22), but you will want to go to Weston for the best selection.

 

Attached is the official flyer announcing the events at Weston Nurseries.

 

Joe Bruso

 

'Orchid Lights' is a Diploid

Rhododendron 'Orchid Lights', which is in the Northern Lights group from the University of Minnesota documented as Rhododendron canadense X Rhododendron x kosteranum, 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.

Rhododendron x kosteranum is documented as having been derived from Rhododendron molle.

Summary of Ploidy Levels

Diploid Rhododendron canadense
Diploid Rhododendron molle
Diploid Rhododendron 'Orchid Lights'
Tetraploid 'Apricot Surprise',
Tetraploid 'Candy Lights',
Tetraploid 'Golden Lights',
Tetraploid 'Lemon Lights',
Tetraploid 'Mandarin Lights',
Tetraploid 'Northern Hi-Lights',
Tetraploid 'Tri-Lights'

Source: John and Sally Perkins

John and Sally Perkins

Mass Chapter ARS Plant Sale, Demo and Show

Next weekend, May 21 & 22, the Mass Chapter ARS will have our annual Sale and Show.  We are splitting this year's events between two venues: 

• Main Plant Sale at Weston Nurseries, Hopkinton MA - May 21 (Sat)
• Truss Show (and smaller plant sale) at Elm Bank - May 22 (Sun)

Details are in the latest Newsletter.  

There have been some recent additions however that are being communicated here.

 

Weston Nurseries Events, Saturday, May 21

 

Demo & Presentation/Discussion

CJ Patterson will give two demos/presentations at Weston Nurseries:

• 11:00 AM - Pruning Rhododendrons & Azaleas
• 2:00 PM - Plant Doctor Clinic.  Bring your questions and problems with you to obtain solutions. 

Mini-Truss Display

Several people have expressed an interest in bringing trusses and/or choice foliage to Weston to complement the plant sale and demos.  Therefore we will have tubes, blocks and index cards on-hand for use by volunteers and other chapter members who bring trusses for a non-judged display.  These do not necessarily have to be "show quality" specimens or meet the rules of the formal show (to be held the next day).  All are encouraged to bring something.  Tables will be set up in the greenhouse attached to the back of the Weston garden center.  This is also where the Sale and demos will be held.  Signs will point the way from the front of Weston Nurseries.

 

Plant Sale Details

The main Plant Sale will occur at Weston Nurseries in Hopkinton.  This sale will contain plants from several sources, ranging in size from 4" plants through larger, multi-gallon size.  It will include choice hybrids as well a species and foliage plants, rhododendrons, evergreen and deciduous azaleas.  Plants not sold at Weston will be transported to the Elm Bank Society Row sale the next day (Sunday, May 22), but you will want to go to Weston for the best selection.

 

Attached is the official flyer announcing the events at Weston Nurseries.

 

Joe Bruso

'Tri-Lights' is a Tetraploid

Rhododendron 'Tri-Lights', which is in the Northern Lights group from the University of Minnesota documented as Rhododendron atlanticum X 'Dayton Red', has been determined to be a tetraploid 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 'Orchid Lights',
Tetraploid Rhododendron atlanticum,
Tetraploid 'Apricot Surprise',
Tetraploid 'Candy Lights',
Tetraploid 'Golden Lights',
Tetraploid 'Lemon Lights',
Tetraploid 'Mandarin Lights',
Tetraploid 'Northern Hi-Lights',
Tetraploid 'Tri-Lights'

Source: RareFind Nursery

John and Sally Perkins

'Candy Lights' is a Tetraploid

Rhododendron 'Candy Lights', which is in the Northern Lights group from the University of Minnesota documented as Rhododendron atlanticum X 'Dayton Red', has been determined to be a tetraploid 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 'Orchid Lights',
Tetraploid Rhododendron atlanticum,
Tetraploid 'Apricot Surprise',
Tetraploid 'Candy Lights',
Tetraploid 'Golden Lights',
Tetraploid 'Lemon Lights',
Tetraploid 'Mandarin Lights',
Tetraploid 'Northern Hi-Lights',
Tetraploid 'Tri-Lights'

Source: RareFind Nursery

John and Sally Perkins

'Mandarin Lights' is a Tetraploid

Rhododendron 'Mandarin Lights', which is in the Northern Lights group from the University of Minnesota documented as a cross between Rhododendron calenducaleum and 'Orangeade', has been determined to be a tetraploid 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 'Orchid Lights',
Tetraploid Rhododendron calendulaceum,
Tetraploid 'Apricot Surprise',
Tetraploid 'Candy Lights',
Tetraploid 'Golden Lights',
Tetraploid 'Lemon Lights',
Tetraploid 'Mandarin Lights',
Tetraploid 'Northern Hi-Lights',
Tetraploid 'Tri-Lights'

Source: RareFind Nursery

John and Sally Perkins

'Lemon Lights' is a Tetraploid

Rhododendron 'Lemon Lights', which is in the Northern Lights group from the University of Minnesota documented as open pollinated seedling of an exbury possibly having a Rhododendron canadense hybrid as the pollen parent, has been determined to be a tetraploid 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.

Despite the appearance of Rhododednron 'Lemon Lights' reflecting some of characteristics common to Rhododendron canadense, the ploidy results and the normal rules of engagement where tetraploids normally reject pollen from diploids for deciduous azaleas do not support Rhododendron canadense being involved.

Summary of Ploidy Levels

Diploid Rhododendron canadense,
Diploid Rhododendron 'Orchid Lights',
Tetraploid 'Apricot Surprise',
Tetraploid 'Candy Lights',
Tetraploid 'Golden Lights',
Tetraploid 'Lemon Lights',
Tetraploid 'Mandarin Lights',
Tetraploid 'Northern Hi-Lights',
Tetraploid 'Tri-Lights'

Source: RareFind Nursery

John and Sally Perkins

'Magic' is a Tetraploid

Rhododendron 'Magic', which is a Mezitt Ghent, has been determined to be a tetraploid 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

Tetraploid 'Magic'

Source: Planeview Nursery

John and Sally Perkins

'Siskin' is a Tetraploid

Rhododendron 'Siskin', which is a Waterer Knaphill documented as a crossed between Rhododendron luteum and Rhododendron molle, has been determined to be a tetraploid 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 molle,
Tetraploid Rhododendron luteum,
Tetraploid 'Siskin'

Source: Planeview Nursery

John and Sally Perkins

Reminder: Board Meeting @ Wed May 11 7:30pm - 9pm (ARS Massachusetts Chapter Calendar)

more details » Board Meeting When Wed May 11 7:30pm – 9pm Eastern Time Where Hardings (map) Calendar ARS Massachusetts Chapter Calendar Who • John Perkins - creator

Invitation from Google Calendar You are receiving this email at the account john.a.perkins@gmail.com because you are subscribed for reminders on calendar ARS Massachusetts Chapter Calendar. To stop receiving these notifications, please log in to https://www.google.com/calendar/ and change your notification settings for this calendar.

'Orange Carpet' is a Diploid

Rhododendron 'Orange Carpet', which is a natural hybrid collected in 1962 from Allatoona Lake, GA registered by Earl Sommerville documented as containing Rhododendron flammeum and Rhododendron calendulaceum, 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.

Based soley on the ploidy evidence, Rhododendron 'Orange Carpet' may not have Rhododendron calendulaceum in its parentage.

Summary of Ploidy Levels

Diploid Rhododendron flammeum,
Diploid Rhododendron 'Orange Carpet',
Tetraploid Rhododendron calendulaceum

Source: Planeview Nursery

John and Sally Perkins

'Razzberry' is a Diploid

Rhododendron 'Razzberry', which is a natural hybrid collected in 1962 from Allatoona Lake, GA registered by Earl Sommerville documented as containing Rhododendron flammeum and Rhododendron periclymenoides, 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 flammeum,
Diploid Rhododendron periclymenoides,
Diploid Rhododendron 'Razzberry'

Source: Planview Nursery

John and Sally Perkins

'Pink Ember' is a Diploid

Rhododendron 'Pink Ember', which is a Earl Sommerville hybrid documented as (Rhododendron cumberlandense x Rhododendron viscosum) x Rhododendron arborescens, 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 arborescens,
Diploid Rhododendron cumberlandense,
Diploid Rhododendron viscosum,
Diploid Rhododendron 'Pink Ember'

Source: Planview Nursery

John and Sally Perkins

'Earl's Gold' Is a Tetraploid

Rhododendron 'Earl's Gold', which is a Earl Sommerville introduction documented as Rhododendron austrinum or austrinum hybrid, has been determined to be a tetraploid 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

Triploid 'Evening Sun',
Tetraploid Rhododendron austrinum,
Tetraploid 'Earl's Gold',
Tetraploid 'Sommerville Sunrise'

Source: Planview Nursery

John and Sally Perkins

'Sommerville Sunrise' is a Tetraploid

Rhododendron 'Sommerville Sunrise', which is a Earl Sommerville introduction documented as Rhododendron austrinum or austrinum hybrid, has been determined to be a tetraploid 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

Triploid 'Evening Sun',
Tetraploid Rhododendron austrinum,
Tetraploid 'Earl's Gold',
Tetraploid 'Sommerville Sunrise'

Source: RareFind Nursery

John and Sally Perkins

Reminder: Board Meeting @ Wed May 11 7:30pm - 9pm (ARS Massachusetts Chapter Calendar)

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'Yellow Delight' is a Tetrploid

Rhododendron 'Yellow Delight', which is a Beasley hybrid, has been determined to be a tetraploid 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

Tetraploid Rhododendron 'Yellow Delight'

Source: RareFind Nursery

John and Sally Perkins

Rhododendron austrinum 'Millie Mac' is a Tetraploid

Rhododendron austrinum'Millie Mac' has been determined to be a tetraploid 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

Tetraploid Rhododendron austrinum,
Tetraploid Rhododendron austrinum Album Form,
Tetraploid Rhododendron austrinum 'Millie Mac'

Source: RareFind Nursery

John and Sally Perkins

'June Jubilee' is a Diploid

Rhododendron 'June Jubilee', which is an Aromi hybrid, 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 'June Jubilee'

Source: RareFind Nursery

John and Sally Perkins

'Lakeside' is a Tetraploid

Rhododendron 'Lakeside' has been determined to be a tetraploid 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

Tetraploid 'Lakeside'

Source: RareFind Nursery

John and Sally Perkins