Index

R. 'Asian Sunrise'

Rhododendron Hybrid

? X ?

Hybridized By: Childers, A.A.

R. 'Aspansia'

Rhododendron Hybrid

? X ?

Hybridized By: Aberconway, Lord. Bodnant, Tal-y-Cafn, Wales, 1932

R. 'Aspansia Group'

Rhododendron Cultivar group

? X ?

Hybridized By: Aberconway, Lord. Bodnant, Tal-y-Cafn, Wales

R. 'Aspasia'

Vireya Hybrid

R. 'Maiden's Blush' X R. javanicum ssp teysmannii

Hybridized By: Unknown

R. asperrimum

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. asperulum

Species

Subgenus: Rhododendron
Section: Pseudovireya

R. asperum

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Astarte'

Rhododendron Hybrid

R. dichroanthum ssp dichroanthum X R. 'Penjerrick'

Hybridized By: Aberconway, Lord. Bodnant, Tal-y-Cafn, Wales, 1931

R. asterochnoum var asterochnoum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Fortunea

R. asterochnoum var brevipedicellatum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Fortunea

R. 'Astra'

Azalea Hybrid

R. kosterianum X R. canescens

Hybridized By: Kondratovičs, Rihard | Riga | Latvia, 1974

R. 'Astra'

Azalea Hybrid

R. indicum X R. 'Hatsu-shimo'

Hybridized By: Morrison, B.Y. | Pass Christian, Mississippi | USA, 1947

R. 'Astrid'

Rhododendron Hybrid

R. 'Fantastica' X R. 'Feuerschein'

Hybridized By: Hachmann, Hans. Barmstedt in Holstein, Germany, 1976

R. 'Athanasius'

Vireya Hybrid

R. 'laetum X viriosum x macgregoriae' X R. javanicum ssp javanicum

Hybridized By: Unknown

R. 'Athena'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. 'Atis'

Rhododendron Hybrid

? X ?

Hybridized By: Kondratovičs, Rihard. Riga, Latvia, 1957

R. atlanticum

Species

Subgenus: Pentanthera
Section: Pentanthera
Subsection: Pentanthera

R. atlanticum f confusum

Species

R. atlanticum 'Little's Super Truss'

Azalea Species Selection

Selected By: Little, P.L. , Piping Tree Gardens, Beaverdam, Virgina , USA, 1995

Subgenus: Pentanthera
Section: Pentanthera
Subsection: Pentanthera

R. atlanticum 'Seaboard'

Rhododendron Species Selection

Selected By: Unknown

Subgenus: Pentanthera
Section: Pentanthera
Subsection: Pentanthera

R. 'atlanticum x periclymenoides'

Azalea Hybrid

R. atlanticum X R. periclymenoides

Hybridized By: No hybridiser registered

R. 'atlanticum x unkown (MLA no. 570091A)'

Azalea Hybrid

? X ?

Hybridized By: University of Minnesota

R. 'Atlantis'

Rhododendron Hybrid

R. catawbiense X R. 'dichroanthum X griffithianum x auriculatum'

Hybridized By: Leach, Dr. David G.. North Madison, Ohio, USA, 1952

R. 'Atrier Group'

Rhododendron Cultivar group

R. 'Atrosanguineum' X R. griersonianum

Hybridized By: Gable, J.B.. Stewartstown, Pennsylvania, USA, 1945

R. 'Atrier Group X decorum x haematodes'

Rhododendron Hybrid

R. 'Atrier Group' X R. 'decorum x haematodes'

Hybridized By: No hybridiser registered

R. 'Atroflo'

Rhododendron Hybrid

R. 'Atrosanguineum' X R. floccigerum

Hybridized By: Gable, J.B.. Stewartstown, Pennsylvania, USA, 1940

R. atropunicum

Species

Subgenus: Rhododendron
Section: Pogonanthum

R. atropurpureum

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Atrosanguineum'

Rhododendron Hybrid

R. catawbiense X ?

Hybridized By: Waterer, H. (Knaphill). Woking, Surrey (Knaphill), UK, 1851

R. 'Atrotrill'

Rhododendron Hybrid

R. 'Atroflo' X R. 'Trilby'

Hybridized By: Johnson, D.B., 1986

R. atrovirens

Species

Subgenus: Tsutsusi
Section: Tsutsusi

R. 'Atsumizakura'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1978

R. 'Atta Girl'

Rhododendron Hybrid

? X ?

Hybridized By: Goodrich, J.M. (Jane) & Ray. Vienna, Virginia, USA

R. 'Attraction'

Rhododendron Hybrid

R. ponticum X ?

Hybridized By: Koster & Sons

R. 'Auburn Beauty'

Vireya Hybrid

R. laetum X

Hybridized By: Unknown

R. 'Aucklandii Hybrid'

Rhododendron Hybrid

R. griffithianum X ?

Hybridized By: Unknown

R. 'Audacius'

Rhododendron Hybrid

R. dauricum Sempervirens Group X ?

Hybridized By: Brueckner, J.B.. Mississauga, Ontario, Canada, 1976

R. 'Audrey Wynniatt'

Azalea Hybrid

? X ?

Hybridized By: Rothschild, L. de | Founder of Exbury Gardens | UK

R. 'Auftakt'

Rhododendron Hybrid

R. 'Kokardia' X R. 'Inamorata Group x Nymphenburg'

Hybridized By: Müller, Heinz, 1990

R. 'August'

Rhododendron Hybrid

? X ?

Hybridized By: Unknown

R. 'August Lamken'

Rhododendron Hybrid

R. 'Doctor V.H. Rutgers' X R. williamsianum

Hybridized By: Hobbie, Dietrich G.. Westerstede/Linswege, Germany, 1942

R. 'August Sunrise'

Azalea Hybrid

R. arborescens X ?

Hybridized By: Callaway Gardens, 1978

R. 'August to Frost'

Azalea Hybrid

R. mucronatum var mucronatum X ?

Hybridized By: Matlack, M. B., 1940

R. 'Auguste van Geert'

Rhododendron Hybrid

? X ?

Hybridized By: van Geert, C., 1863

R. 'Augustine's White Lie'

Rhododendron Hybrid

R. augustinii ssp augustinii X ?

Hybridized By: Unknown

R. augustinii ssp augustinii

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Triflora

R. augustinii ssp augustinii 'Barto Blue'

Rhododendron Species Selection

Selected By: Barto, James , Eugene, Oregon , USA, 1958

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Triflora

R. augustinii ssp augustinii 'Blue Cloud'

Rhododendron Species Selection

Selected By: Unknown

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Triflora

R. augustinii ssp augustinii 'Caprice'

Rhododendron Species Selection

Selected By: Hansen Ruth , Portland Oregon , USA, 1958

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Triflora

R. augustinii ssp augustinii 'Fair Sky'

Rhododendron Species Selection

Selected By: Barto, James , Eugene, Oregon , USA, 1929

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Triflora

R. augustinii ssp augustinii 'Firwood Best'

Rhododendron Species Selection

Selected By: Unknown

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Triflora