Index

R. 'Opal'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. 'Opal Dawn'

Rhododendron Hybrid

R. davidsonianum 'Exbury Pink' X R. 'Countess of Haddington'

Hybridized By: Gordon, R.C

R. 'Opal Fawcett'

Rhododendron Hybrid

? X ?

Hybridized By: Ostbo, E.. Bellevue, Washington, USA, 1958

R. 'Opal Luster'

Rhododendron Hybrid

R. 'Nancy Evans' X R. 'Percy Wiseman'

Hybridized By: Fujioka, Frank. Whidbey Island, USA, 1988

R. 'Operetta Group'

Rhododendron Cultivar group

? X ?

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

R. 'Ophelia'

Vireya Hybrid

? X ?

Hybridized By: Unknown

R. 'Ophelia Group'

Rhododendron Cultivar group

? X ?

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

R. 'Oporto'

Rhododendron Hybrid

R. thomsonii ssp thomsonii X R. sanguineum ssp sanguineum var haemaleum

Hybridized By: Ingram, C.. Benenden, Kent, England, 1953

R. 'Opossum'

Azalea Hybrid

R. 'Purpurtraum' X R. 'Blue Danube'

Hybridized By: Cox, P.A. & K.N.E. | Glendoick | Scotland, 1997

R. opulentum

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Oracle'

Azalea Hybrid

? X ?

Hybridized By: Smith, F. & A., 1863

R. 'Oracle'

Azalea Hybrid

R. indicum X

Hybridized By: unknown, 1947

R. 'Orange Amber'

Rhododendron Hybrid

R. 'Dazzler' X R. 'Hill's Low Red'

Hybridized By: Barlup, Jim. Bellevue, USA, 2006

R. 'Orange Baron'

Azalea Hybrid

? X ?

Hybridized By: Barber

R. 'Orange Beauty'

Azalea Hybrid

R. 'Hinodegiri' X R. 'Malvaticum'

Hybridized By: van Nes C. B . & Sons | Boskoop | Netherlands, 1920

R. 'Orange Boven'

Azalea Hybrid

? X ?

Hybridized By: Bier, G. J. & Sons | Melle | Belgium

R. 'Orange Cameo'

Rhododendron Hybrid

R. 'Lem's Cameo' X R. 'Kubla Khan'

Hybridized By: Unknown

R. 'Orange Carpet'

Azalea Hybrid

R. calendulaceum X R. flammeum

Hybridized By: Sommerville, E.A., 1960

R. 'Orange Cloak'

Azalea Hybrid

? X ?

Hybridized By: Girard, P.E. | Geneva, Ohio | USA

R. 'Orange Cloud'

Azalea Hybrid

? X ?

Hybridized By: Aromi, E.J | Mobile, Alabama | USA

R. 'Orange Cup'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. 'Orange Essence'

Azalea Hybrid

? X ?

Hybridized By: Mezitt, E.V. | Weston Nurseries, Hopkinton, Massachusetts | USA

R. 'Orange Flirt'

Rhododendron Hybrid

? X ?

Hybridized By: Unknown

R. 'Orange Harmony'

Vireya Hybrid

R. 'Sweet Wendy' X R. javanicum ssp javanicum

Hybridized By: Waghorn, F.R., 1985

R. 'Orange Honey'

Rhododendron Hybrid

R. 'Blondie' X R. catawbiense 'Powell Glass'

Hybridized By: Pride, O.S.. Butler, Pennsylvania, USA, 1970

R. 'Orange Lemonade'

Rhododendron Hybrid

R. 'Goldsworth Orange' X ?

Hybridized By: Johnson, D.B., 1985

R. 'Orange Leopard'

Rhododendron Hybrid

R. 'Point Defiance' X R. 'Voluptuous'

Hybridized By: Brack, W. (Werner). St. James, New York, USA, 2003

R. 'Orange Marmalade'

Rhododendron Hybrid

R. degronianum ssp yakushimanum X R. 'Mrs Lammot Copeland'

Hybridized By: Larson, H.L.. Tacoma, Washington, USA, 1969

R. 'Orange Marmalade x Lem's Cameo'

Rhododendron Hybrid

R. 'Orange Marmalade' X R. 'Lem's Cameo'

Hybridized By: No hybridiser registered

R. 'Orange Prelude'

Rhododendron Hybrid

R. 'Lem's Tangerine' X R. 'Lem's Cameo x (Lem's Cameo x Ken Janeck) X Brandt's Tropicana x (Whopper x Brandt's Tropicana)'

Hybridized By: Barlup, Jim. Bellevue, USA, 1998

R. 'Orange Queen'

Vireya Hybrid

? X ?

Hybridized By: Unknown

R. 'Orange Rhyme'

Azalea Hybrid

? X ?

Hybridized By: Aromi, E.J | Mobile, Alabama | USA

R. 'Orange Ruffy'

Rhododendron Hybrid

? X ?

Hybridized By: Ahern, T. (Tom). Bethlehem, PA, USA

R. 'Orange Sander'

Azalea Hybrid

? X ?

Hybridized By: Camellia Lodge Nursery

R. 'Orange Sherbert'

Rhododendron Hybrid

? X ?

Hybridized By: Pride, O.S.. Butler, Pennsylvania, USA

R. 'Orange Splendor'

Azalea Hybrid

? X ?

Hybridized By: Arneson, Ivan & Robertha | Arneson Nursery, Canby, Oregon | USA

R. 'Orange Splendour'

Azalea Hybrid

? X ?

Hybridized By: Arneson, Ivan & Robertha | Arneson Nursery, Canby, Oregon | USA

R. 'Orangeade'

Azalea Hybrid

? X ?

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

R. 'Orangefeuer Group'

Rhododendron Cultivar group

? X ?

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

R. 'Orangengold'

Rhododendron Hybrid

R. dichroanthum ssp scyphocalyx X ?

Hybridized By: Wieting, J.. Baumschulen, Gisselhorst/Westerstede, Germany, 1970

R. 'Orangina'

Rhododendron Hybrid

R. 'fortunei ssp discolor x John Walter' X R. dichroanthum ssp scyphocalyx

Hybridized By: Hobbie, Dietrich G.. Westerstede/Linswege, Germany, 1955

R. 'Oratorium'

Rhododendron Hybrid

R. 'Feuerschein' X R. 'Thunderstorm'

Hybridized By: Unknown

R. 'Orbianum'

Rhododendron Hybrid

? X ?

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

R. 'Orbicarb Group'

Rhododendron Cultivar group

? X ?

Hybridized By: Magor, E.J.P.. Lamellan, St. Tudy, Cornwall, England

R. orbiculare ssp cardiobasis

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Fortunea

R. orbiculare ssp orbiculare

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Fortunea

R. orbiculare ssp orbiculare 'Painted Snipe'

Rhododendron Species Selection

Selected By: Unknown

Subgenus: Hymenanthes
Section: Pontica
Subsection: Fortunea

R. orbiculatum

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Orbis'

Rhododendron Hybrid

? X ?

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

R. 'Orbwill Group'

Rhododendron Cultivar group

? X ?

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

R. 'Orchard Road'

Rhododendron Hybrid

? X ?

Hybridized By: Grant, Mrs. G.. Orton, Temuka, New Zealand