Index

R. 'Ubald Croux'

Rhododendron Hybrid

? X ?

Hybridized By: Croux & Fils. Châtenay-Malabry, France, 1984

R. 'Ubald Croux'

Azalea Hybrid

? X ?

Hybridized By: Croux & Fils | Châtenay-Malabry | France, 1938

R. 'Uchiwa-gasane'

Azalea Hybrid

? X ?

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

R. 'Uchu-no-hikari'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1979

R. 'Uchu-no-tsuki'

Azalea Hybrid

? X ?

Hybridized By: Nuccio's Nurseries | Altadena, California | USA, 1984

R. 'Uelfe = Ülfe'

Azalea Hybrid

R. 'Noordtianum' X ?

Hybridized By: Arends, G. | Wuppertal | Germany, 1914

R. 'Ugigomo-no-tsuki'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1979

R. 'Ugo Fisch'

Azalea Hybrid

R. yedoense var poukhanense X ?

Hybridized By: Frei-Glaus, E. & H., 1974

R. 'Uguns'

Azalea Hybrid

? X ?

Hybridized By: Kondratovičs, Rihard | Riga | Latvia, 1971

R. 'Ukamuse'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1918

R. 'Uki-funei'

Azalea Hybrid

? X ?

Hybridized By: Greer, Harold E. | Eugene, Oregon | USA, 1987

R. 'Ukigumo-no-tsuki'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1984

R. 'Ulrike Jost'

Rhododendron Hybrid

R. 'Bellefontaine' X R. 'Lumina x Perlina'

Hybridized By: Hachmann, Hans. Barmstedt in Holstein, Germany, 1987

R. ultimum

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Ultrasleek'

Rhododendron Hybrid

R. 'Catalgla x Pink Twins' X R. 'Delp's Dream'

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

R. 'Umatilla'

Azalea Hybrid

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

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

R. 'Umbellatum Album'

Azalea Hybrid

? X ?

Hybridized By: Verschaffelt, A. (Alexander) | Ghent | Belgium, 1861

R. 'Umpqua'

Azalea Hybrid

? X ?

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

R. 'Umpqua Chief'

Rhododendron Hybrid

R. 'Fabia Group' X R. 'Azor Group'

Hybridized By: James Delbert W.. Eugene, Oregon, USA, 1958

R. 'Umpqua Chief x War Paint'

Rhododendron Hybrid

R. 'Umpqua Chief' X R. elliottii 'War Paint'

Hybridized By: No hybridiser registered

R. 'Umpqua Princess'

Rhododendron Hybrid

? X ?

Hybridized By: Sanders, George Merle. Roseburg, Oregon, USA

R. 'Umpqua Queen'

Azalea Hybrid

? X ?

Hybridized By: Schoneman, R., 1968

R. 'Una Mary'

Rhododendron Hybrid

R. 'Purple Splendour' X R. 'Van Nes Sensation'

Hybridized By: Stockman, M.. Port Angeles, Washington, USA, 1983

R. unciferum

Species

Subgenus: Tsutsusi
Section: Tsutsusi

R. 'Uncle Arch'

Rhododendron Hybrid

R. 'Petra's Debut' X R. 'Mrs E C Stirling'

Hybridized By: Dosser, D.J.. Lower Wilmot, Tasmania, Australia, 1990

R. 'Uncle Salmon'

Azalea Hybrid

? X ?

Hybridized By: Carlson's Gardens | (Bob & Janice Carlson), South Salem, New York | USA

R. 'Undine'

Azalea Hybrid

? X ?

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

R. 'Unelma'

Rhododendron Hybrid

? X ?

Hybridized By: Uosukainen, Marjatta, Dr. Mrs.. Laukaa, Finland, 2010

R. 'Unforgettable'

Rhododendron Hybrid

R. 'Anna' X R. 'Nestucca'

Hybridized By: Furman, R.A.. Brewster, MA, USA, 1979

R. 'Ungerio Group'

Rhododendron Cultivar group

? X ?

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

R. ungernii

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Pontica

R. ungernii 'Rachel Foster'

Rhododendron Species Selection

Selected By: Rothschild, Edmund Leopold de , Southampton , UK, 2005

Subgenus: Hymenanthes
Section: Pontica
Subsection: Pontica

R. 'ungernii x auriculatum'

Rhododendron Hybrid

R. ungernii X R. auriculatum

Hybridized By: No hybridiser registered

R. 'Ungetsu-no-hikari'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. uniflorum

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Uniflora

R. uniflorum 'Dalkeith'

Rhododendron Species Selection

Selected By: Unknown

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Uniflora

R. 'Unique'

Rhododendron Hybrid

R. campylocarpum ssp campylocarpum X ?

Hybridized By: Slocock, Walter C.. Goldsworth Nursery, Woking, UK, 1934

R. 'Unique'

Azalea Hybrid

? X ?

Hybridized By: Verschaffelt, L | Royghem (near Ghent) | Belgium, 1853

R. 'Unique Marmalade'

Rhododendron Hybrid

R. 'Orange Marmalade' X R. 'Unique'

Hybridized By: Davis, J.A., 1980

R. 'Unique x Leonardslee Luscombei'

Rhododendron Hybrid

R. 'Unique' X R. 'Leonardslee Luscombei'

Hybridized By: No hybridiser registered

R. 'University Place'

Rhododendron Hybrid

? X ?

Hybridized By: Minch, F.. Puyallup, Washington, USA, 1970

R. 'Unknow Warrior x arboreum'

Rhododendron Hybrid

R. 'Unknown Warrior' X R. arboreum ssp arboreum

Hybridized By: No hybridiser registered

R. 'unknown Indian azalea hybrid x Carol'

Azalea Hybrid

? X R. 'Carol'

Hybridized By: Unknown

R. 'Unknown Warrior'

Rhododendron Hybrid

R. 'Queen Wilhelmina' X R. 'Stanley Davies'

Hybridized By: van Nes C. B . & Sons. Boskoop, Netherlands, 1922

R. 'Unknown Warrior x Ole Olson'

Rhododendron Hybrid

R. 'Unknown Warrior' X R. 'Ole Olson'

Hybridized By: Watson, E.M. Mrs. (Elsie). Kirkland, WA, USA

R. 'unnamed Whitney hybrid'

Rhododendron Hybrid

? X ?

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

R. 'Upbeat'

Rhododendron Hybrid

R. 'Midsummer' X R. 'Delp's Red Max'

Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1977

R. 'Upton'

Azalea Hybrid

? X ?

Hybridized By: Pratt, M.C., 1986

R. 'UQ-1'

Azalea Hybrid

? X ?

Hybridized By: Aromi, E.J | Mobile, Alabama | USA

R. urophyllum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Parishia

R. 'Ursula'

Azalea Hybrid

R. 'Illusion' X R. 'Gaiety'

Hybridized By: Morrison, B.Y. | Pass Christian, Mississippi | USA, 1947