Index

R. 'Alphonse Pericat'

Azalea Hybrid

? X ?

Hybridized By: Pericat, A., 1931

R. 'Alphonsianum'

Azalea Hybrid

? X ?

Hybridized By: de Witte, 1875

R. 'Alphée'

Azalea Hybrid

? X ?

Hybridized By: Demay, H., 1895

R. 'Alpine'

Azalea Hybrid

? X ?

Hybridized By: USDA, Department of Agriculture | Beltsville, Maryland | USA, 1960

R. 'Alpine Dew'

Rhododendron Hybrid

R. racemosum X R. 'Tessa'

Hybridized By: Cowles, J.C.. Stow, MA (superintendent of Dexter Estate 1959-1967), USA, 1976

R. 'Alpine Gem Group'

Rhododendron Cultivar group

R. brachyanthum ssp brachyanthum X R. ferrugineum

Hybridized By: Thacker, T.C., 1942

R. 'Alpine Glow'

Rhododendron Hybrid

R. 'Loderi Group' X R. calophytum var calophytum

Hybridized By: Rothschild, L. de. Founder of Exbury Gardens, UK, 1938

R. 'Alpine Meadow'

Rhododendron Hybrid

R. leucaspis X ?

Hybridized By: Dunedin Rhododendron Group, 1985

R. 'Alpine Rose'

Rhododendron Hybrid

R. 'Loderi Group' X R. calophytum var calophytum

Hybridized By: Rothschild, L. de. Founder of Exbury Gardens, UK, 1938

R. 'Alpine Snow'

Rhododendron Hybrid

R. 'lindleyi x dalhousiae' X R. taggianum

Hybridized By: Richards, C.W., 1969

R. 'Alpinum'

Azalea Hybrid

? X ?

Hybridized By: The Netherlands, hybridizer not registered, 1960

R. 'Alre Group'

Rhododendron Hybrid

R. 'Alan Group' X R. forrestii Repens Group

Hybridized By: Aberconway, Lord. Bodnant, Tal-y-Cafn, Wales, 1942

R. 'Alsace'

Rhododendron Hybrid

? X ?

Hybridized By: , 1890

R. 'Alsea'

Azalea Hybrid

R. 'Hugh Wormald' X R. 'Marion Merriman'

Hybridized By: Slonecker, H.J. | Milwaukie, Oregon | USA, 1963

R. 'Alston'

Rhododendron Hybrid

R. 'Hawk Group' X R. griffithianum

Hybridized By: Fortescue, L.S., 1970

R. 'Alstroemeroides'

Rhododendron Hybrid

R. 'Caucasicum Album' X ?

Hybridized By: Boddaert, B., 1853

R. 'Alstroemeroides Album'

Rhododendron Hybrid

? X ?

Hybridized By: André, E. F., 1864

R. 'Altaclarense'

Rhododendron Hybrid

X R. arboreum ssp arboreum

Hybridized By: Gowen, J.R., 1826

R. 'Altaclarense'

Azalea Hybrid

R. molle ssp japonicum X ?

Hybridized By: Lee, J. & C. | Hammersmith, London | England, 1862

R. 'Altaclarense Coccineum'

Rhododendron Hybrid

? X ?

Hybridized By: Veitch & Son, J.. Royal Exotic Nurseries, Chelsea, London, England, 1867

R. 'Altaclarense Roseum'

Rhododendron Hybrid

? X ?

Hybridized By: Gheldolf, C., 1844

R. 'Altaclarense Speciosum'

Rhododendron Hybrid

? X ?

Hybridized By: , 1839

R. 'Altaclarense Splendens'

Rhododendron Hybrid

? X ?

Hybridized By: Gheldolf, C., 1844

R. 'Altaclarense Superbum'

Rhododendron Hybrid

? X ?

Hybridized By: , 1843

R. 'Altaclarense Triumph'

Rhododendron Hybrid

? X ?

Hybridized By: Guérin, M, 1842

R. 'Altaclerense'

Azalea Hybrid

R. molle ssp molle X R. viscosum 'Rubescens Major'

Hybridized By: Highclere, 1842

R. 'Altaclerense Group'

Rhododendron Hybrid

? X ?

Hybridized By: Unknown

R. 'Altair'

Azalea Hybrid

R. 'Ivory' X R. 'Kagetsu'

Hybridized By: Morrison, B.Y. | Pass Christian, Mississippi | USA, 1948

R. 'Altair'

Azalea Hybrid

? X ?

Hybridized By: Exbury | The Rothschild Estate, Hampshire | England, 1977

R. 'Altanuwa'

Azalea Hybrid

R. cumberlandense X R. viscosum

Hybridized By: Holmsomback, O., 1986

R. alternans

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. alticola

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Altweibersommer'

Rhododendron Hybrid

R. degronianum ssp yakushimanum X ?

Hybridized By: Müller, Heinz, 1991

R. 'Alumni Day'

Rhododendron Hybrid

R. maximum X R. fortunei ssp discolor

Hybridized By: Nearing, G.G.. Ramsey, NJ, USA, 1958

R. alutaceum var alutaceum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Taliensia

R. alutaceum var iodes

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Taliensia

R. alutaceum var iodes 'White Plains'

Rhododendron Species Selection

Selected By: Unknown

Subgenus: Hymenanthes
Section: Pontica
Subsection: Taliensia

R. alutaceum var russotinctum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Taliensia

R. alutaceum var russotinctum 'Easter Island'

Rhododendron Species Selection

Selected By: Clarke, S.R. , Borde Hill, West Sussex , England, 1980

Subgenus: Hymenanthes
Section: Pontica
Subsection: Taliensia

R. 'Alva'

Rhododendron Hybrid

R. hemsleyanum X R. degronianum ssp yakushimanum 'Koichiro Wada'

Hybridized By: Goheen. Dr. David. Camas, Washington, USA, 1963

R. 'Alvera Hager'

Azalea Hybrid

R. 'Pink Pearl x Mandarin' X R. 'Mother of Pearl'

Hybridized By: Hager, D. | Hager Nurseries, Spotsylvania, Virginia | USA, 1984

R. 'Alvinda Group'

Rhododendron Cultivar group

R. 'Ivery's Scarlet' X R. 'Loderi Group'

Hybridized By: Aberconway, Lord. Bodnant, Tal-y-Cafn, Wales, 1926

R. 'Always a Lady'

Rhododendron Hybrid

? X ?

Hybridized By: Childers, A.A., 1966

R. 'Always Admired'

Rhododendron Hybrid

R. 'Scintillation' X R. haematodes ssp haematodes

Hybridized By: Wister, J.C.. Swarthmore, PA, USA, 1958

R. 'Always April'

Rhododendron Hybrid

R. 'Mindy's Love' X R. 'Pink Petticoats'

Hybridized By: Barlup, Jim. Bellevue, USA, 1995

R. 'Alwin'

Rhododendron Hybrid

? X ?

Hybridized By: Seidel, T.J.R.. Dresden/Grüngräbchen, Germany, 1906

R. 'Alyssa Nori'

Rhododendron Hybrid

R. 'Nancy Evans' X R. 'Crest x Ken Janeck'

Hybridized By: Brockenbrough, E.C. Bellevue, Washington, USA, 1975

R. 'Alyssa Ray'

Rhododendron Hybrid

R. 'Weldy' X R. 'Fiery Orange'

Hybridized By: Ring, T.L.. Bellaire, Ohio, USA, 1988

R. 'Alzina'

Azalea Hybrid

? X ?

Hybridized By: Coolidge Rare Plant gardens, 1935

R. 'Alďna'

Azalea Hybrid

R. 'Uguns' X ?

Hybridized By: Kondratovičs, Rihard | Riga | Latvia, 1976

R. amabile

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya