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R. 'Albert de Mezey'Rhododendron HybridR. williamsianum X ?Hybridized By: Vaartnou, H., 1975 |
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R. 'Adrastia Group'Rhododendron Cultivar groupR. williamsianum X R. neriiflorum ssp neriiflorumHybridized By: Aberconway, Lord. Bodnant, Tal-y-Cafn, Wales, 1946 More information and pictures |
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R. 'Kimberly'Rhododendron HybridR. williamsianum X R. fortunei ssp fortuneiHybridized By: Greer, Harold E.. Eugene, Oregon, USA, 1963 More information and pictures |
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R. 'Maureen'Rhododendron HybridR. williamsianum X R. 'Lem's Goal'Hybridized By: Lem Halfdan. Seattle, Washington, USA, 1973 More information and pictures |
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R. 'Honingen'Rhododendron HybridR. williamsianum X R. oreodoxa var oreodoxaHybridized By: Hobbie, Dietrich G.. Westerstede/Linswege, Germany, 1965 |
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R. 'Grayswood Pink'Rhododendron HybridR. williamsianum X R. venatorHybridized By: Dowry, G. H., 1949 |
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R. 'Osmar'Rhododendron HybridR. williamsianum X ?Hybridized By: UK, No hybridizer registered, 1965 More information and pictures |
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R. 'Arthur J. Ivens'Rhododendron HybridR. williamsianum X R. fortunei ssp discolorHybridized By: Ivens, 1932 More information and pictures |
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R. 'Arab'Rhododendron HybridR. williamsianum X R. sperabile var sperabileHybridized By: Rothschild, L. de. Founder of Exbury Gardens, UK, 1933 |
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R. 'White Pippin'Rhododendron HybridR. williamsianum X R. 'Olympic Lady Group'Hybridized By: Larson, H.L.. Tacoma, Washington, USA, 1954 More information and pictures |
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R. 'Whisperingrose'Rhododendron HybridR. williamsianum X R. 'Elizabeth Group'Hybridized By: Greer, Harold E.. Eugene, Oregon, USA, 1982 |
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R. 'Cowslip'Rhododendron HybridR. williamsianum X R. wardii var wardiiHybridized By: Aberconway, Lord. Bodnant, Tal-y-Cafn, Wales, 1930 More information and pictures |
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R. 'James Barto'Rhododendron HybridR. williamsianum X R. orbiculare ssp orbiculareHybridized By: Barto, James. Eugene, Oregon, USA, 1958 More information and pictures |
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R. 'Ed Hillary'Rhododendron HybridR. williamsianum X R. grandeHybridized By: Campbell, B.W.. Ravensbourne, Dunedin, New Zealand, 1980 |
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R. 'Ruth Tracy'Rhododendron HybridR. williamsianum X R. 'Vera Elliott'Hybridized By: Elliott, W., 1980 |
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R. 'Jock'Rhododendron HybridR. williamsianum X R. griersonianumHybridized By: Stirling-Maxwell, Sir John, 1939 More information and pictures |
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R. 'Colina'Rhododendron HybridR. williamsianum X R. Sir Charles LemonHybridized By: Goheen. Dr. David. Camas, Washington, USA, 1963 |
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R. 'Mary de Mezey'Rhododendron HybridR. williamsianum X R. wardii var wardiiHybridized By: Mezey de, A., 1975 |
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R. 'Earlybird'Rhododendron HybridR. williamsianum X R. oreodoxa var fargesiiHybridized By: Henny, Rudolph. Brooks, Oregon, USA, 1959 |
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R. 'Dainty Jean'Rhododendron HybridR. williamsianum X R. 'Helene Schiffner'Hybridized By: The Bovees Nursery, 1962 |
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R. 'Moerheim's Pink'Rhododendron HybridR. williamsianum X R. 'Genoveva'Hybridized By: Hobbie, Dietrich G.. Westerstede/Linswege, Germany, 1945 |
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R. 'Mission Bells'Rhododendron HybridR. williamsianum X R. orbiculare ssp orbiculareHybridized By: Lancaster, Ben, F.. Lackamas Gardens, Camas, Washington, USA, 1940 More information and pictures |
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R. 'Brickdust'Rhododendron HybridR. williamsianum X R. 'Dido Group'Hybridized By: Henny, Rudolph. Brooks, Oregon, USA, 1960 More information and pictures |
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R. 'Görlitz'Rhododendron HybridR. williamsianum X R. 'Rinaldo'Hybridized By: von Martin, V.. Rothenburg/Oberlausitz, Germany, 1964 |
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R. 'Easter Bells'Rhododendron HybridR. williamsianum X R. 'China Group'Hybridized By: Lancaster, Ben, F.. Lackamas Gardens, Camas, Washington, USA, 1966 |
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R. 'Dormouse Group'Rhododendron Cultivar groupR. 'Dawn's Delight' X R. williamsianumHybridized By: Rothschild, L. de. Founder of Exbury Gardens, UK, 1936 More information and pictures |
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R. 'High Sheriff'Rhododendron HybridR. decorum ssp decorum X R. williamsianumHybridized By: Williams, F.J., 1960 More information and pictures |
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R. 'Stadt Essen'Rhododendron HybridR. 'Louis Pasteur' X R. williamsianumHybridized By: Hobbie, Dietrich G.. Westerstede/Linswege, Germany, 1948 More information and pictures |
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R. 'Elfenbein'Rhododendron HybridR. 'Adriaan Koster' X R. williamsianumHybridized By: Hobbie, Dietrich G.. Westerstede/Linswege, Germany, 1947 More information and pictures |
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R. 'Moonstone Group'Rhododendron Cultivar groupR. campylocarpum ssp campylocarpum X R. williamsianumHybridized By: Williams, John Charles. Caerhays, Cornwall, England, 1933 More information and pictures |
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R. 'August Lamken'Rhododendron HybridR. 'Doctor V.H. Rutgers' X R. williamsianumHybridized By: Hobbie, Dietrich G.. Westerstede/Linswege, Germany, 1942 More information and pictures |
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R. 'campylocarpum x williamsianum'Rhododendron HybridR. campylocarpum ssp campylocarpum X R. williamsianumHybridized By: No hybridiser registered |
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R. 'Vater Böhlje'Rhododendron HybridR. catawbiense X R. williamsianumHybridized By: Hobbie, Dietrich G.. Westerstede/Linswege, Germany, 1970 More information and pictures |
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R. 'Loderi White Diamond x williamsianum'Rhododendron HybridR. 'Loderi White Diamond' X R. williamsianumHybridized By: No hybridiser registered |
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R. 'Hachmann's Andrea'Rhododendron HybridR. 'Fantastica' X R. williamsianumHybridized By: Hachmann, Hans. Barmstedt in Holstein, Germany, 1986 |
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R. 'Thomwilliams Group'Rhododendron Cultivar groupR. thomsonii ssp thomsonii X R. williamsianumHybridized By: Magor, E.J.P.. Lamellan, St. Tudy, Cornwall, England, 1921 More information and pictures |
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R. 'Ladrillo'Rhododendron HybridR. 'Moonstone Group' X R. williamsianumHybridized By: Henny, John. Brooks, Oregon, USA, 1963 |
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R. 'Veryan Bay'Rhododendron HybridR. pseudochrysanthum X R. williamsianumHybridized By: Williams, John Charles. Caerhays, Cornwall, England, 1929 |
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R. 'Karin'Rhododendron HybridR. 'Britannia' X R. williamsianumHybridized By: Boskoop. Research Center fo Arboreus Crops, Netherlands, 1966 More information and pictures |
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R. 'Temple Belle Group'Rhododendron Cultivar groupR. orbiculare ssp orbiculare X R. williamsianumHybridized By: Kew. Royal Botanical Gardens, Surrey, England, 1916 More information and pictures |
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R. 'Erich Beeken'Rhododendron HybridR. 'Britannia' X R. williamsianumHybridized By: Hobbie, Dietrich G.. Westerstede/Linswege, Germany, 1955 More information and pictures |
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R. 'Moonstone Yellow'Rhododendron HybridR. campylocarpum ssp campylocarpum X R. williamsianumHybridized By: Williams, John Charles. Caerhays, Cornwall, England, 1933 More information and pictures |
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R. 'Oldenburg Group'Rhododendron Cultivar groupR. fortunei ssp discolor X R. williamsianumHybridized By: Hobbie, Dietrich G.. Westerstede/Linswege, Germany, 1943 |
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R. 'Wega Group'Rhododendron Cultivar groupR. fortunei ssp fortunei 'Sir Charles Butler' X R. williamsianumHybridized By: Hobbie, Dietrich G.. Westerstede/Linswege, Germany, 1945 |
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R. 'Olympic Lady Group'Rhododendron Cultivar groupR. 'Loderi King George' X R. williamsianumHybridized By: Ostbo, E.. Bellevue, Washington, USA, 1954 More information and pictures |
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R. 'Ivory Bells'Rhododendron HybridR. chlorops X R. williamsianumHybridized By: Lancaster, Ben, F.. Lackamas Gardens, Camas, Washington, USA, 1966 |
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R. 'Brocade'Rhododendron HybridR. 'Vervaeneanum' X R. williamsianumHybridized By: Rothschild, L. de. Founder of Exbury Gardens, UK, 1934 More information and pictures |
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R. 'Bow Bells Group'Rhododendron Cultivar groupR. 'Corona' X R. williamsianumHybridized By: Rothschild, L. de. Founder of Exbury Gardens, UK, 1934 More information and pictures |
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R. 'Varna Group'Rhododendron Cultivar groupR. 'Caman Group' X R. williamsianumHybridized By: Aberconway, Lord. Bodnant, Tal-y-Cafn, Wales, 1935 |
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R. 'Tibet'Rhododendron HybridR. 'Bismarck' X R. williamsianumHybridized By: Hobbie, Dietrich G.. Westerstede/Linswege, Germany, 1966 More information and pictures |
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R. 'Vulcan's Bells'Rhododendron HybridR. 'Vulcan's Flame' X R. williamsianumHybridized By: Lancaster, Ben, F.. Lackamas Gardens, Camas, Washington, USA, 1965 More information and pictures |