Index

R. arboreum ssp cinnamomeum var roseum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Arborea

R. arboreum ssp cinnamomeum var roseum f album

Species

R. arboreum ssp delavayi

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Arborea

R. arboreum ssp delavayi 'Margum Castle'

Rhododendron Species Selection

Selected By: Unknown

Subgenus: Hymenanthes
Section: Pontica
Subsection: Arborea

R. arboreum ssp delavayi var albomentosum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Arborea

R. arboreum ssp delavayi var delavayi

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Arborea

R. arboreum ssp delavayi var peramoenum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Arborea

R. arboreum ssp nilagiricum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Arborea

R. arboreum ssp nilagiricum 'Noyo Chief'

Rhododendron Species Selection

Selected By: Bowman, P.J., 1965

Subgenus: Hymenanthes
Section: Pontica
Subsection: Arborea

R. arboreum ssp zeylanicum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Arborea

R. 'arboreum ssp zeylanicum x Pink Pearl'

Rhododendron Hybrid

R. arboreum ssp zeylanicum X R. 'Pink Pearl'

Hybridized By: No hybridiser registered

R. arboreum var album

Species

R. 'arboreum x decorum'

Rhododendron Hybrid

R. arboreum ssp arboreum X R. decorum ssp decorum

Hybridized By: No hybridiser registered

R. 'arboreum x Elizabeth Group'

Rhododendron Hybrid

R. arboreum ssp arboreum X R. 'Elizabeth Group'

Hybridized By: No hybridiser registered

R. 'arboreum x Elizabeth Group X arboreum'

Rhododendron Hybrid

R. 'arboreum x Elizabeth Group' X R. arboreum ssp arboreum

Hybridized By: No hybridiser registered

R. 'arboreum x griffithianum'

Rhododendron Hybrid

R. arboreum ssp arboreum X R. griffithianum

Hybridized By: No hybridiser registered

R. 'arboreum x macrophyllum'

Rhododendron Hybrid

R. arboreum ssp arboreum X R. macrophyllum

Hybridized By: No hybridiser registered

R. 'Arbsutch Group'

Rhododendron Hybrid

? X ?

Hybridized By: Magor, E.J.P.. Lamellan, St. Tudy, Cornwall, England, 1915

R. archboldianum

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Archiduc Ernest'

Azalea Hybrid

? X ?

Hybridized By: Van Houtte, L. B. (Louis Benoit) | Gentbrugge | Belgium, 1887

R. 'Archiduc Sigismund'

Azalea Hybrid

? X ?

Hybridized By: Van Houtte, L. B. (Louis Benoit) | Gentbrugge | Belgium, 1880

R. 'Arctic'

Azalea Hybrid

? X ?

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

R. 'Arctic Bear'

Rhododendron Hybrid

? X ?

Hybridized By: Gordon, R.C

R. 'Arctic Dawn'

Rhododendron Hybrid

? X ?

Hybridized By: Behring, R.. St. Catharines, Ontario, Canada

R. 'Arctic Dreams'

Rhododendron Hybrid

R. 'Horizon Lakeside' X R. 'Arctic Gold'

Hybridized By: Barlup, Jim. Bellevue, USA, 2014

R. 'Arctic Fox'

Azalea Hybrid

R. 'Panda' X R. mucronatum var mucronatum

Hybridized By: Cox, P.A. & K.N.E. | Glendoick | Scotland, 1998

R. 'Arctic Glow'

Rhododendron Hybrid

R. minus Carolinianum Group X R. dauricum 'Arctic Pearl'

Hybridized By: Lewis, D., 1970

R. 'Arctic Gold'

Rhododendron Hybrid

? X ?

Hybridized By: Mezitt, E.V.. Weston Nurseries, Hopkinton, Massachusetts, USA, 1971

R. 'Arctic Snow'

Rhododendron Hybrid

R. maximum X R. brachycarpum ssp tigerstedtii

Hybridized By: Behring, R.. St. Catharines, Ontario, Canada, 1973

R. 'Arctic Tern'

Rhododendron Hybrid

R. trichostomum X R. groenlandicum

Hybridized By: Larson, H.L.. Tacoma, Washington, USA, 1982

R. 'Ardent Beau'

Rhododendron Hybrid

R. 'Billy Budd' X R. 'Etta Burrows'

Hybridized By: O'Rourke, H.. Burnie, Tasmania, Australia, 1987

R. 'Ardeur'

Azalea Hybrid

? X ?

Hybridized By: de Coninck-Dervaes, L.

R. 'Arends Favorite'

Rhododendron Hybrid

? X ?

Hybridized By: Unknown

R. arenicola

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. arfakianum

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Argentina'

Rhododendron Hybrid

R. 'catawbiense x yakushimanum' X R. 'Fanfare x Gertrud Schäle Group'

Hybridized By: Leach, Dr. David G.. North Madison, Ohio, USA, 1966

R. argipeplum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Barbata

R. 'Argosy'

Rhododendron Hybrid

R. fortunei ssp discolor X R. auriculatum

Hybridized By: Rothschild, L. de. Founder of Exbury Gardens, UK, 1933

R. 'Argosy Group'

Rhododendron Cultivar group

R. fortunei ssp discolor X R. auriculatum

Hybridized By: Rothschild, L. de. Founder of Exbury Gardens, UK, 1933

R. 'Argosy Snow White'

Rhododendron Hybrid

? X ?

Hybridized By: Unknown

R. argyrophyllum ssp argyrophyllum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Argyrophylla

R. argyrophyllum ssp hypoglaucum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Argyrophylla

R. argyrophyllum ssp hypoglaucum 'Heane Wood'

Rhododendron Species Selection

Selected By: Hardy, Maj. A.E. , Hythe, Kent , UK, 1972

Subgenus: Hymenanthes
Section: Pontica
Subsection: Argyrophylla

R. argyrophyllum ssp nankingense

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Argyrophylla

R. argyrophyllum ssp nankingense 'Chinese Silver'

Rhododendron Species Selection

Selected By: Crown Estate Commissioners , Windsor, Berkshire , England, 1957

Subgenus: Hymenanthes
Section: Pontica
Subsection: Argyrophylla

R. argyrophyllum ssp omeiense

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Argyrophylla

R. argyrophyllum var cupulare

Species

R. 'Ariadne'

Rhododendron Hybrid

R. griffithianum X R. 'Grand Duke of Würtemberg'

Hybridized By: Van Nes, C.B., 1931

R. 'Ariadne'

Rhododendron Hybrid

? X ?

Hybridized By: Noble, C.. Standish & Noble, Bagshot, Surrey, England, 1862

R. 'Ariadne'

Azalea Hybrid

? X ?

Hybridized By: Dalličre, A., 1852

R. 'Ariadne'

Azalea Hybrid

? X ?

Hybridized By: Smet-Duvivier. L. de | St. Amandsberg | Belgium, 1888