R. 'Asian Sunrise'Rhododendron Hybrid? X ?Hybridized By: Childers, A.A. |
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R. 'Aspansia'Rhododendron Hybrid? X ?Hybridized By: Aberconway, Lord |
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R. 'Aspansia Group'Rhododendron Cultivar group? X ?Hybridized By: Aberconway, Lord |
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R. 'Aspasia'Vireya HybridR. 'Maiden's Blush' X R. javanicum ssp teysmannii |
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R. 'Astarte'Rhododendron HybridR. dichroanthum ssp dichroanthum X R. 'Penjerrick'Hybridized By: Aberconway, Lord |
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R. asterochnoum var asterochnoumSpecies
Subgenus:
Hymenanthes
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R. asterochnoum var brevipedicellatumSpecies
Subgenus:
Hymenanthes
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R. 'Astra'Azalea HybridR. kosterianum X R. canescensHybridized By: Kondratovičs, Rihard |
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R. 'Astra'Azalea HybridR. indicum X R. 'Hatsu-shimo'Hybridized By: Morrison, B.Y. More information and pictures
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R. 'Astrid'Rhododendron HybridR. 'Fantastica' X R. 'Feuerschein'Hybridized By: Hachmann, Hans More information and pictures
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R. 'Athanasius'Vireya HybridR. 'laetum X viriosum x macgregoriae' X R. javanicum ssp javanicum |
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R. 'Atis'Rhododendron Hybrid? X ?Hybridized By: Kondratovičs, Rihard |
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R. atlanticumSpecies
Subgenus:
Pentanthera
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R. atlanticum f confusumSpecies |
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R. atlanticum 'Little's Super Truss'Azalea Species SelectionSelected By: Little, P.L. |
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R. atlanticum 'Seaboard'Rhododendron Species Selection |
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R. 'atlanticum x periclymenoides'Azalea HybridR. atlanticum X R. periclymenoides |
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R. 'atlanticum x unkown (MLA no. 570091A)'Azalea Hybrid? X ?Hybridized By: University of Minnesota |
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R. 'Atlantis'Rhododendron HybridR. catawbiense X R. 'dichroanthum X griffithianum x auriculatum'Hybridized By: Leach, Dr. David G. |
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R. 'Atrier Group'Rhododendron Cultivar groupR. 'Atrosanguineum' X R. griersonianumHybridized By: Gable, J.B. More information and pictures
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R. 'Atrier Group X decorum x haematodes'Rhododendron HybridR. 'Atrier Group' X R. 'decorum x haematodes' |
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R. 'Atroflo'Rhododendron HybridR. 'Atrosanguineum' X R. floccigerumHybridized By: Gable, J.B. More information and pictures
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R. 'Atrosanguineum'Rhododendron HybridR. catawbiense X ?Hybridized By: Waterer, H. (Knaphill) More information and pictures
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R. 'Atrotrill'Rhododendron HybridR. 'Atroflo' X R. 'Trilby'Hybridized By: Johnson, D.B. |
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R. 'Atta Girl'Rhododendron Hybrid? X ?Hybridized By: Goodrich, J.M. (Jane) & Ray |
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R. 'Attraction'Rhododendron HybridR. ponticum X ?Hybridized By: Koster & Sons More information and pictures
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R. 'Auburn Beauty'Vireya HybridR. laetum X R. christianae |
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R. 'Audacius'Rhododendron HybridR. dauricum Sempervirens Group X ?Hybridized By: Brueckner, J.B. More information and pictures
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R. 'Audrey Wynniatt'Azalea Hybrid? X ?Hybridized By: Rothschild, L. de More information and pictures
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R. 'Auftakt'Rhododendron HybridR. 'Kokardia' X R. 'Inamorata Group x Nymphenburg'Hybridized By: Müller, Heinz More information and pictures
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R. 'August'Rhododendron Hybrid? X ? |
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R. 'August Lamken'Rhododendron HybridR. 'Doctor V.H. Rutgers' X R. williamsianumHybridized By: Hobbie, Dietrich G. More information and pictures
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R. 'August Sunrise'Azalea HybridR. arborescens X ?Hybridized By: Callaway Gardens |
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R. 'August to Frost'Azalea HybridR. mucronatum var mucronatum X ?Hybridized By: Matlack, M. B. More information and pictures
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R. 'Auguste van Geert'Rhododendron Hybrid? X ?Hybridized By: van Geert, C. More information and pictures
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R. 'Augustine's White Lie'Rhododendron HybridR. augustinii ssp augustinii X ?More information and pictures 
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R. augustinii ssp augustiniiSpecies
Subgenus:
Rhododendron
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R. augustinii ssp augustinii 'Barto Blue'Rhododendron Species SelectionSelected By: Barto, James More information and pictures
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R. augustinii ssp augustinii 'Blue Cloud'Rhododendron Species SelectionMore information and pictures 
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R. augustinii ssp augustinii 'Caprice'Rhododendron Species SelectionSelected By: Hansen Ruth |
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R. augustinii ssp augustinii 'Fair Sky'Rhododendron Species SelectionSelected By: Barto, James More information and pictures
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