Index

R. 'Oropa'

Rhododendron Hybrid

? X ?

Hybridized By: Parco Burcina. Pollone, Biella, Italy

R. 'Orrie Dille'

Rhododendron Hybrid

? X ?

Hybridized By: Stockman, M.. Port Angeles, Washington, USA

R. orthocladum var microleucum

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Lapponica

R. orthocladum var orthocladum

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Lapponica

R. 'Ortiga Group'

Rhododendron Cultivar group

? X ?

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

R. 'Orton Bradley'

Rhododendron Hybrid

? X ?

Hybridized By: Boswell, E.D. Mrs

R. 'Oryx'

Azalea Hybrid

R. 'cumberlandense x occidentale' X R. 'Kilauea'

Hybridized By: Waterer, H. (Knaphill) | Woking, Surrey (Knaphill) | UK, 1959

R. 'Os's Oriana'

Vireya Hybrid

? X ?

Hybridized By: Unknown

R. 'Osaka'

Azalea Hybrid

R. 'Madame Petrick' X R. 'Pink Dream'

Hybridized By: Van Lancker, M. | Melle - Reseach Station for Ornamental Plant Growing | Belgium, 1962

R. 'Osakazuki'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1929

R. 'Osakazuki x Flame'

Azalea Hybrid

R. 'Osakazuki' X R. 'Flame'

Hybridized By: No hybridiser registered

R. 'Osakazuki x Suetsumu'

Azalea Hybrid

R. 'Osakazuki' X R. 'Suetsumu'

Hybridized By: No hybridiser registered

R. 'Oscar I'

Azalea Hybrid

? X ?

Hybridized By: van Geert, C., 1877

R. 'Oskar'

Azalea Hybrid

? X ?

Hybridized By: Schulz, O. (head-gardener, Royal Porcelain Factory) | Berlin | Germany, 1895

R. 'Osmar'

Rhododendron Hybrid

R. williamsianum X ?

Hybridized By: UK, No hybridizer registered, 1965

R. 'Oso'

Rhododendron Hybrid

R. 'Lem's Tangerine' X R. 'Goldsworth Yellow x decorum ssp diaprepes'

Hybridized By: Newcomb,L.L.. Snohomish, Washington, USA, 1983

R. 'Ostalett'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. 'Ostbo's Copper'

Rhododendron Hybrid

R. 'Fabia Group' X R. 'Mrs W.C. Slocock'

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

R. 'Ostbo's Low Yellow'

Rhododendron Hybrid

? X ?

Hybridized By: Ostbo, E.. Bellevue, Washington, USA, 1960

R. 'Ostbo's Yellow'

Rhododendron Hybrid

? X ?

Hybridized By: Unknown

R. 'Ostergold'

Rhododendron Hybrid

? X ?

Hybridized By: Unknown

R. 'Osterküken'

Rhododendron Hybrid

? X ?

Hybridized By: Wieting, J.. Baumschulen, Gisselhorst/Westerstede, Germany, 1984

R. 'Osterschnee'

Rhododendron Hybrid

R. 'Mardi Gras' X R. praevernum

Hybridized By: Hachmann, Hans. Barmstedt in Holstein, Germany, 1985

R. 'Ostfriesland'

Rhododendron Hybrid

R. 'Madame de Bruin' X R. forrestii Repens Group

Hybridized By: Hobbie, Dietrich G.. Westerstede/Linswege, Germany, 1949

R. osuzuyamense

Species

Subgenus: Tsutsusi
Section: Brachycalyx

R. 'Oswald de Kerchove'

Azalea Hybrid

? X ?

Hybridized By: Van Houtte, L. B. (Louis Benoit) | Gentbrugge | Belgium, 1871

R. 'Oswald Schreiber'

Azalea Hybrid

? X ?

Hybridized By: Rose, J., 1886

R. 'Otava'

Azalea Hybrid

X R. yedoense var poukhanense

Hybridized By: Jelínek, J., 1962

R. 'Othello'

Rhododendron Hybrid

? X ?

Hybridized By: Brandt, Lester E.. Tacoma, Washington, USA, 1947

R. 'Othello'

Rhododendron Hybrid

R. maximum X ?

Hybridized By: Standish & Noble. Bagshot, Surrey, England, 1847

R. 'Othello'

Rhododendron Hybrid

? X ?

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

R. 'Othello'

Azalea Hybrid

? X ?

Hybridized By: Schulz, M., 1892

R. 'Othello'

Azalea Hybrid

? X ?

Hybridized By: Standish & Noble | Bagshot, Surrey | England, 1848

R. 'Othello'

Azalea Hybrid

? X ?

Hybridized By: Koster & Co., 1920

R. 'Othello'

Azalea Hybrid

? X ?

Hybridized By: Baumann, J. | Ghent | Belgium, 1859

R. 'Otis Hyde'

Rhododendron Hybrid

R. 'Fabia' X R. 'Exbury Albatross'

Hybridized By: Larson, H.L.. Tacoma, Washington, USA, 1965

R. 'Oto-kirishima'

Azalea Hybrid

? X ?

Hybridized By: Ito, Ihei | Register from 1692 | Japan, 1692

R. 'Otohime'

Azalea Hybrid

? X ?

Hybridized By: No hybridiser registered, 1958

R. 'Otome'

Azalea Hybrid

R. 'Izayoi' X R. 'Kyokko-nishiki'

Hybridized By: Chugai Nursery Co. | Kobe-city, Hyogo | Japan, 1939

R. 'Otome'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1918

R. 'Otome-gokara'

Azalea Hybrid

? X ?

Hybridized By: Kyoma Yokota Nursery

R. 'Otome-no-mai'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1979

R. 'Otomeno'

Azalea Hybrid

? X ?

Hybridized By: Greer Gardens

R. 'Ottawa'

Rhododendron Hybrid

R. fortunei ssp discolor X R. campylocarpum Elatum Group

Hybridized By: Rothschild, L. de. Founder of Exbury Gardens, UK, 1942

R. 'Otterwood'

Azalea Hybrid

? X ?

Hybridized By: Rothschild, Edmund Leopold de | Southampton | UK, 1970

R. 'Otto'

Azalea Hybrid

R. simsii var simsii X ?

Hybridized By: Stahnke, O. | Sassenburg | Germany, 1994

R. 'Otto and Betty'

Rhododendron Hybrid

? X ?

Hybridized By: Tolstead, W.L.. Davis and Elkins College, Elkins, WV, USA

R. 'Otto Forster'

Rhododendron Hybrid

? X ?

Hybridized By: Firma Seidel, 1894

R. 'Otto Hahn'

Azalea Hybrid

? X ?

Hybridized By: Fleischmann, C. | Wiesmoor, Ostfriesland | Germany

R. 'Otto Liliental'

Azalea Hybrid

? X ?

Hybridized By: Kersbergen, Gebr., 1918

R. 'Ouchi-jishi'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1984