Index

R. 'Radistrotum'

Rhododendron Hybrid

R. calostrotum ssp keleticum Radicans Group X R. calostrotum ssp calostrotum

Hybridized By: Arends, G.. Wuppertal, Germany, 1940

R. 'Radium Group'

Rhododendron Cultivar group

R. griersonianum X R. 'Earl of Athlone'

Hybridized By: Crosfield, J. J.. Embley Park, Romsey, Hampshire, UK, 1936

R. 'Radmosum Group'

Rhododendron Cultivar group

R. calostrotum ssp keleticum Radicans Group X R. racemosum

Hybridized By: Thacker, T.C., 1958

R. 'Radnor'

Rhododendron Hybrid

R. 'Red Cloud' X R. degronianum ssp yakushimanum 'Koichiro Wada'

Hybridized By: Reese, W.A., 1978

R. 'Raeanum'

Rhododendron Hybrid

R. 'maximum x ponticum' X R. 'Altaclerense Group'

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

R. 'Raeburn'

Rhododendron Hybrid

R. racemosum X R. tephropeplum

Hybridized By: Ingram, C.. Benenden, Kent, England, 1955

R. 'Ragan's Marietta'

Rhododendron Hybrid

? X ?

Hybridized By: Ragan, W.A, 1969

R. 'Ragan's Pride'

Rhododendron Hybrid

? X ?

Hybridized By: Ragan, W.A, 1969

R. 'Ragged Robin'

Rhododendron Hybrid

R. griffithianum X ?

Hybridized By: Waterer (Bagshot). Surrey, England, 1920

R. 'Raging Bull'

Rhododendron Hybrid

R. 'Fantastica' X R. 'The Honourable Jean Marie de Montague'

Hybridized By: Whitman, M.J.. Wall, NJ, USA, 1994

R. 'Ragtime'

Rhododendron Hybrid

R. 'Tony's Gift' X R. 'Serenata'

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

R. 'Raijin'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1976

R. 'Raiko'

Azalea Hybrid

X ?

Hybridized By: Japan | no hybridiser registration, 1979

R. 'Raimunde'

Azalea Hybrid

R. 'Betty Kelly' X R. 'Cecile'

Hybridized By: Hachmann, Hans | Barmstedt in Holstein | Germany, 1967

R. 'Raimunde x Twilight Sky'

Azalea Hybrid

R. 'Raimunde' X R. 'Twilight Sky'

Hybridized By: No hybridiser registered

R. 'Rain Dance'

Azalea Hybrid

R. 'Nancy of Robinhill' X R. 'Gartrell's Lower Rock'

Hybridized By: Gartrell, R. D. | Highland Farms, Black Mountain, North Carolina | USA, 1984

R. 'Rain Fire'

Azalea Hybrid

R. austrinum 'Moonbeam' X R. mucronatum var mucronatum 'Lilacinum'

Hybridized By: Harris, J.O. | Lawrenceville, Georgia | USA, 1970

R. 'Rain of Gold'

Rhododendron Hybrid

? X ?

Hybridized By: Kersey, R.J., 1960

R. 'Rainbow'

Rhododendron Hybrid

R. griffithianum X ?

Hybridized By: Slocock, Walter C.. Goldsworth Nursery, Woking, UK, 1928

R. 'Rainbow Bright'

Rhododendron Hybrid

? X R. 'Dead Ringer'

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

R. 'Rainbow's End'

Rhododendron Hybrid

R. 'Butter Brickle' X R. 'Fabia Group x Lem's Early Orange'

Hybridized By: Lofthouse, J.G.. Vancouver, British Columbia, Canada, 1983

R. 'Rainier Pink'

Rhododendron Hybrid

? X ?

Hybridized By: , 1963

R. 'Rainier Red'

Azalea Hybrid

R. 'Exquisite' X R. 'Crimson Glory'

Hybridized By: Smith, B. | Dromana, Victoria | Australia, 1985

R. 'Raisa'

Rhododendron Hybrid

R. brachycarpum ssp tigerstedtii X ?

Hybridized By: Uosukainen, Marjatta, Dr. Mrs.. Laukaa, Finland, 2003

R. 'Raisa'

Rhododendron Hybrid

R. hippophaeoides var hippophaeoides X R. polycladum

Hybridized By: Greer, Harold E.. Eugene, Oregon, USA, 1975

R. 'Rajah'

Rhododendron Hybrid

? X ?

Hybridized By: Standish, J.. Bagshot, Surrey, England, 1879

R. 'Rajah'

Rhododendron Hybrid

R. neriiflorum ssp neriiflorum Euchaites Group X R. thomsonii ssp thomsonii

Hybridized By: Harrison, E.G.W.W.. Bodmin, Cornwall, England, 1961

R. 'Rajomon'

Azalea Hybrid

? X ?

Hybridized By: Wada, K. | Hakonea Nursery, Numazu | Japan, 1937

R. 'Rajpur'

Rhododendron Hybrid

R. 'Jalisco Group' X R. 'Trianon'

Hybridized By: Rothschild, Edmund Leopold de. Southampton, UK, 1986

R. 'Rakan'

Azalea Hybrid

? X ?

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

R. 'Rakete'

Rhododendron Hybrid

R. 'Caractatus' X R. 'Louis Pasteur'

Hybridized By: Hermann, E., 1964

R. 'Rakuzan'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1979

R. 'Ralph'

Azalea Hybrid

R. mucronatum var mucronatum X R. 'Blaauw's Pink'

Hybridized By: Van de Ven, H., 1966

R. 'Ralph Pape'

Rhododendron Hybrid

R. 'Sunset Yates' X R. 'Pink Punch'

Hybridized By: Yates, H.R.. Frostburg, Maryland,, USA, 1968

R. 'Ralph Purnell'

Rhododendron Hybrid

R. cerasinum X R. 'Doncaster'

Hybridized By: Thacker, T.C., 1942

R. 'Ralph Sanders'

Rhododendron Hybrid

? X ?

Hybridized By: Waterer, H. (Knaphill). Woking, Surrey (Knaphill), UK, 1881

R. 'Ramapo'

Rhododendron Hybrid

R. minus Carolinianum Group X R. fastigiatum

Hybridized By: Nearing, G.G.. Ramsey, NJ, USA, 1940

R. 'Ramaya'

Rhododendron Hybrid

R. 'Nancy Evans' X R. 'Cream Glory'

Hybridized By: Workman, Y.. Cape Coral, Florida, USA, 1988

R. 'Rambling Rose'

Azalea Hybrid

? X ?

Hybridized By: Kerrigan, Howard, 1987

R. 'Ramella'

Rhododendron Hybrid

? X ?

Hybridized By: Parco Burcina. Pollone, Biella, Italy

R. 'Ramillies Group'

Rhododendron Cultivar group

R. 'Ethel Group' X R. 'Redwing Group'

Hybridized By: Aberconway, Lord. Bodnant, Tal-y-Cafn, Wales, 1934

R. ramipilosum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Thomsonia

R. 'Ramolet'

Rhododendron Hybrid

R. 'Ramapo' X ?

Hybridized By: Foster, H.L., 1985

R. 'Ramona'

Rhododendron Hybrid

R. 'Huntsman Group' X R. neriiflorum ssp neriiflorum

Hybridized By: Ramsden, Sir John. Muncaster Castle, UK, 1964

R. 'Ramona'

Azalea Hybrid

? X ?

Hybridized By: Cuthbert, Messrs, 1902

R. ramsdenianum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Irrorata

R. 'Ramsey Tinsel'

Rhododendron Hybrid

R. 'Chesapeake' X ?

Hybridized By: Nearing, G.G.. Ramsey, NJ, USA, 1962

R. 'Random Red'

Azalea Hybrid

R. calendulaceum X R. periclymenoides

Hybridized By: Towe, L.C. & Anastos, N., 1985

R. 'Ranger'

Azalea Hybrid

R. 'Shishu' X R. 'Hatsu-shimo'

Hybridized By: Morrison, B.Y. | Pass Christian, Mississippi | USA, 1941

R. 'Rangitoto Blush'

Vireya Hybrid

? X ?

Hybridized By: Oldham, B.E., 1993

R. 'Rangitoto Dawn'

Vireya Hybrid

? X ?

Hybridized By: Oldham, B.E., 1993