Rhododendron Index

R. 'Oropa'

Rhododendron Hybrid

? x ?

Hybridized By: Parco Burcina

R. 'Orrie Dille'

Rhododendron Hybrid

? x ?

Hybridized By: Stockman, M.

R. orthocladum var microleucum

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Lapponica

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R. orthocladum var orthocladum

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Lapponica

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R. 'Ortiga Group'

Rhododendron Cultivar group

? x ?

Hybridized By: Aberconway, Lord

R. 'Orton Bradley'

Rhododendron Hybrid

? x ?

Hybridized By: Boswell, E.D. Mrs

R. 'Oryx'

Deciduous Azalea Hybrid

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

Hybridized By: Waterer, H. (Knaphill)

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R. 'Os's Oriana'

Vireya Hybrid

? x ?

R. 'Osaka'

Evergreen Azalea Hybrid

R. 'Madame Petrick' x R. 'Pink Dream'

Hybridized By: Van Lancker, M.

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R. 'Osakazuki'

Evergreen Azalea Hybrid

? x ?

Hybridized By: Japan

R. 'Osakazuki x Flame'

Evergreen Azalea Hybrid

R. 'Osakazuki' x R. 'Flame'

R. 'Osakazuki x Suetsumu'

Evergreen Azalea Hybrid

R. 'Osakazuki' x R. 'Suetsumu'

R. 'Oscar I'

Deciduous Azalea Hybrid

? x ?

Hybridized By: van Geert, C.

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R. 'Oskar'

Evergreen Azalea Hybrid

? x ?

Hybridized By: Schulz, O. (head-gardener, Royal Porcelain Factory)

R. 'Osmar'

Rhododendron Hybrid

R. williamsianum x ?

Hybridized By: UK, No hybridizer registered

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R. 'Oso'

Rhododendron Hybrid

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

Hybridized By: Newcomb,L.L.

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R. 'Ostalett'

Evergreen Azalea Hybrid

? x ?

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R. 'Ostbo's Copper'

Rhododendron Hybrid

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

Hybridized By: Ostbo, E.

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R. 'Ostbo's Low Yellow'

Rhododendron Hybrid

? x ?

Hybridized By: Ostbo, E.

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R. 'Ostbo's Yellow'

Rhododendron Hybrid

? x ?

R. 'Ostergold'

Rhododendron Hybrid

? x ?

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R. 'Osterküken'

Rhododendron Hybrid

? x ?

Hybridized By: Wieting, J.

R. 'Osterschnee'

Rhododendron Hybrid

R. 'Mardi Gras' x R. praevernum

Hybridized By: Hachmann, Hans

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R. 'Ostfriesland'

Rhododendron Hybrid

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

Hybridized By: Hobbie, Dietrich G.

R. osuzuyamense

Species

Subgenus: Tsutsusi
Section: Brachycalyx

R. 'Oswald de Kerchove'

Evergreen Azalea Hybrid

? x ?

Hybridized By: Van Houtte, L. B. (Louis Benoit)

R. 'Oswald Schreiber'

Evergreen Azalea Hybrid

? x ?

Hybridized By: Rose, J.

R. 'Otava'

Evergreen Azalea Hybrid

R. Amoenum x R. yedoense var poukhanense

Hybridized By: Jelínek, J.

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R. 'Othello'

Rhododendron Hybrid

? x ?

Hybridized By: Brandt, Lester E.

R. 'Othello'

Rhododendron Hybrid

R. maximum x ?

Hybridized By: Standish & Noble

R. 'Othello'

Rhododendron Hybrid

? x ?

Hybridized By: Aberconway, Lord

R. 'Othello'

Evergreen Azalea Hybrid

? x ?

Hybridized By: Schulz, M.

R. 'Othello'

Evergreen Azalea Hybrid

? x ?

Hybridized By: Standish & Noble

R. 'Othello'

Evergreen Azalea Hybrid

? x ?

Hybridized By: Koster & Co.

R. 'Othello'

Evergreen Azalea Hybrid

? x ?

Hybridized By: Baumann, J.

R. 'Otis Hyde'

Rhododendron Hybrid

R. 'Fabia' x R. 'Exbury Albatross'

Hybridized By: Larson, H.L.

R. 'Oto-kirishima'

Evergreen Azalea Hybrid

? x ?

Hybridized By: Ito, Ihei

R. 'Otohime'

Evergreen Azalea Hybrid

? x ?

R. 'Otome'

Evergreen Azalea Hybrid

R. 'Izayoi' x R. 'Kyokko-nishiki'

Hybridized By: Chugai Nursery Co.

R. 'Otome'

Evergreen Azalea Hybrid

? x ?

Hybridized By: Japan

R. 'Otome-gokara'

Azalea Hybrid

? x ?

Hybridized By: Kyoma Yokota Nursery

R. 'Otome-no-mai'

Evergreen Azalea Hybrid

? x ?

Hybridized By: Japan

R. 'Otomeno'

Evergreen 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

R. 'Otterwood'

Deciduous Azalea Hybrid

? x ?

Hybridized By: Rothschild, Edmund Leopold de

R. 'Otto'

Evergreen Azalea Hybrid

R. simsii var simsii x ?

Hybridized By: Stahnke, O.

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R. 'Otto and Betty'

Rhododendron Hybrid

? x ?

Hybridized By: Tolstead, W.L.

R. 'Otto Forster'

Rhododendron Hybrid

? x ?

Hybridized By: Firma Seidel

R. 'Otto Hahn'

Deciduous Azalea Hybrid

? x ?

Hybridized By: Fleischmann, C.

R. 'Otto Liliental'

Deciduous Azalea Hybrid

? x ?

Hybridized By: Kersbergen, Gebr.