Index

R. 'Royston Reverie'

Rhododendron Hybrid

R. auriculatum X R. 'Fabia Group'

Hybridized By: Greig, E,J. & M.. Royston Nurseries, Vancouver Island, BC, Canada, 1980

R. 'Royston Rose'

Rhododendron Hybrid

? X ?

Hybridized By: Greig, E,J. & M.. Royston Nurseries, Vancouver Island, BC, Canada

R. 'Royston Summertime'

Rhododendron Hybrid

? X ?

Hybridized By: Greig, E,J. & M.. Royston Nurseries, Vancouver Island, BC, Canada

R. 'Roza'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. 'Roza Bonheur'

Azalea Hybrid

? X ?

Hybridized By: Van der Cruyssen, E. | Gentbrugge | Belgium, 1876

R. 'Roza Stevenson'

Rhododendron Hybrid

? X ?

Hybridized By: Stevenson, J.B.. Ascot, Berkshire, England, 1969

R. 'Rozamarie Group'

Rhododendron Cultivar group

? X ?

Hybridized By: Stevenson, J.B.. Ascot, Berkshire, England, 1930

R. 'Rozanne Waterer'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. 'Rozie Group'

Rhododendron Cultivar group

? X ?

Hybridized By: Stevenson, J.B.. Ascot, Berkshire, England, 1919

R. 'Ruach'

Rhododendron Hybrid

? X ?

Hybridized By: Ogdon, B.J.

R. rubellum

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Rubens'

Rhododendron Hybrid

? X ?

Hybridized By: Byls, J., 1863

R. 'Rubens'

Rhododendron Hybrid

? X ?

Hybridized By: Waterer (Bagshot). Surrey, England

R. 'Rubens'

Azalea Hybrid

? X ?

Hybridized By: Vuylsteke, C., 1900

R. 'Rubens'

Azalea Hybrid

? X ?

Hybridized By: Verschaffelt, L | Royghem (near Ghent) | Belgium, 1846

R. 'Rubicon'

Rhododendron Hybrid

R. arboreum ssp nilagiricum 'Noyo Chief' X R. 'Kilimanjaro'

Hybridized By: Gordon, R.C, 1979

R. rubiginosum

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Heliolepida

R. rubiginosum Desquamatum Group

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Heliolepida

R. rubiginosum 'Finch'

Rhododendron Species Selection

Selected By: Henny, Rudolph , Brooks, Oregon , USA

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Heliolepida

R. rubiginosum 'Rosey Ball'

Rhododendron Species Selection

Selected By: Unknown

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Heliolepida

R. rubiginosum var leclerei

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Heliolepida

R. rubiginosum var ptilostylum

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Heliolepida

R. rubiginosum 'Wakehurst'

Rhododendron Species Selection

Selected By: Unknown

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Heliolepida

R. 'Rubina'

Vireya Hybrid

X R. culminicola var culminicola

Hybridized By: Unknown

R. 'Rubina Group'

Rhododendron Cultivar group

? X ?

Hybridized By: Unknown

R. 'Rubina Group x Fabia Group'

Rhododendron Hybrid

R. 'Rubina Group' X R. 'Fabia Group'

Hybridized By: No hybridiser registered

R. rubineiflorum

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Rubinetta'

Azalea Hybrid

R. 'Mother's Day' X R. 'Kermesinum'

Hybridized By: Hachmann, Hans | Barmstedt in Holstein | Germany, 1961

R. 'Rubinetta x Vuyk's Scarlet'

Azalea Hybrid

R. 'Rubinetta' X R. 'Vuyk's Scarlet'

Hybridized By: No hybridiser registered

R. 'Rubinfeuer'

Rhododendron Hybrid

? X ?

Hybridized By: Backhus, A.W.. Edewecht-Kleefeld, Germany, 1988

R. 'Rubinstern'

Azalea Hybrid

R. 'Mother's Day' X R. 'Kermesinum'

Hybridized By: Hachmann, Hans | Barmstedt in Holstein | Germany, 1959

R. 'Rubinstern X Red Pimpernel x Kermesinum'

Azalea Hybrid

R. 'Rubinstern' X R. 'Red Pimpernel x Kermesinum'

Hybridized By: No hybridiser registered

R. 'Rubinstern x Rubinetta'

Azalea Hybrid

R. 'Rubinstern' X R. 'Rubinetta'

Hybridized By: No hybridiser registered

R. 'Rubis de Meirelbeke'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. rubrobracteum

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. rubropilosum

Species

Subgenus: Tsutsusi
Section: Tsutsusi

R. 'Rubrum Aurantiacum'

Azalea Hybrid

? X ?

Hybridized By: van Geert, A., 1849

R. 'Rubrum Elegans'

Azalea Hybrid

? X ?

Hybridized By: Van Houtte, L. B. (Louis Benoit) | Gentbrugge | Belgium, 1868

R. 'Ruby'

Vireya Hybrid

R. 'Jasminiflorum Carminatum' X R. multicolor var curtisii

Hybridized By: Unknown

R. 'Ruby Anne'

Vireya Hybrid

R. anagalliflorum X R. rubineiflorum

Hybridized By: Unknown

R. 'Ruby Bells'

Vireya Hybrid

X R. commonae

Hybridized By: Unknown

R. 'Ruby Bowman'

Rhododendron Hybrid

R. fortunei ssp fortunei X R. 'Lady Bligh'

Hybridized By: Bowman, R.F., 1940

R. 'Ruby Hart'

Rhododendron Hybrid

R. 'Carmen Group x Elizabeth Group' X R. elliottii

Hybridized By: Whitney, William E.. Brinnon, Washington, USA, 1956

R. 'Ruby Ice'

Rhododendron Hybrid

R. 'Dopey' X R. 'Doctor Tom Ring'

Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1992

R. 'Rubīns'

Azalea Hybrid

R. kosterianum X R. canescens

Hybridized By: Kondratovičs, Rihard | Riga | Latvia, 1981

R. 'Ruddy Red Max'

Rhododendron Hybrid

? X ?

Hybridized By: Unknown

R. 'Rudolf Abel'

Rhododendron Hybrid

? X ?

Hybridized By: Firma Seidel, 1878

R. 'Rudolph'

Rhododendron Hybrid

? X ?

Hybridized By: Liebig, L.L.. Dresden, Germany, 1867

R. 'Rudolph's Orange'

Rhododendron Hybrid

R. 'Fabia Group' X R. 'Temple Belle Group'

Hybridized By: Henny, Rudolph. Brooks, Oregon, USA, 1958

R. 'Rudy's Fairytail'

Rhododendron Hybrid

? X ?

Hybridized By: Unknown

R. rufescens

Species

Subgenus: Rhododendron
Section: Pogonanthum