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| R. degronianum ssp heptamerum var hondoenseSpecies
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp heptamerum var kyomauruenseSpecies
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp heptamerum var kyomauruense 'Silver Frost'Rhododendron Species SelectionSelected By: Greer, Harold E. , Eugene, Oregon , USA, 1972 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp heptamerum 'Yashiro Homare'Rhododendron Species SelectionSelected By: Yashiro, M., 1985 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanumSpecies
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Baron Lionel'Rhododendron Species SelectionSelected By: Rothschild, Edmund Leopold de , Southampton , UK 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Beefeater'Rhododendron Species SelectionSelected By: UK, No hybridizer registered, 1994 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Best Dane'Rhododendron Species SelectionSelected By: Unknown 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Black Velvet'Rhododendron Species SelectionSelected By: Rare Find Nursery 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Caperci Dwarf'Rhododendron Species SelectionSelected By: Caperci, J.F. 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Church Lane'Rhododendron Species SelectionSelected By: Unknown 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Convexum'Rhododendron Species SelectionSelected By: unknown, 1962 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Dekora'Rhododendron Species SelectionSelected By: Stöckman, E.A. , Baumschule, Bad-Zwischenahn-Rostrup , Germany 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Edelweiss'Rhododendron Species SelectionSelected By: Wieting, J. , Baumschulen, Gisselhorst/Westerstede , Germany, 1986 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Exbury Yakushimanum'Rhododendron Species SelectionSelected By: Exbury , The Rothschild Estate, Hampshire , England 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Hanano-ego'Rhododendron Species SelectionSelected By: Hobbie, Dietrich G. , Westerstede/Linswege , Germany, 1984 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Ken Janeck'Rhododendron Species SelectionSelected By: Janeck, Kenneth , Tacoma, Washington , USA 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Koichiro Wada'Rhododendron Species SelectionSelected By: Royal Horticultural Society, 1947 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Mist Maiden'Rhododendron Species SelectionSelected By: Leach, Dr. David G. , North Madison, Ohio , USA, 1958 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Montanum'Rhododendron Species SelectionSelected By: Unknown 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Nakai'Rhododendron Species SelectionSelected By: Kentville Research Station, 1966 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Parvum'Rhododendron Species SelectionSelected By: Unknown 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Phetteplace'Rhododendron Species SelectionSelected By: Phetteplace, Dr. Carl H , Leaburg, Oregon , USA 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Pink Parasol'Rhododendron Species SelectionSelected By: Leach, Dr. David G. , North Madison, Ohio , USA, 1968 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Planum'Rhododendron Species SelectionSelected By: Unknown 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Power Girl'Rhododendron Species SelectionSelected By: Stöckman, E.A. , Baumschule, Bad-Zwischenahn-Rostrup , Germany 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Rhodoland's Silver Mist'Rhododendron Species SelectionSelected By: Childers, A.A & M. 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Schneekissen'Rhododendron Species SelectionSelected By: Hachmann, Hans , Barmstedt in Holstein , Germany, 1989 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Siouxon'Rhododendron Species SelectionSelected By: Larson, H.L. , Tacoma, Washington , USA, 1960 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'White Velvet'Rhododendron Species SelectionSelected By: Ward, R.W., 1970 
            
                Subgenus: 
                
                        Hymenanthes
                    
                 | More information | 
| R. degronianum ssp yakushimanum 'Yak-ity-yak'Rhododendron Species SelectionSelected By: Swenson, G., 1983 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Yaku Angel'Rhododendron Species SelectionSelected By: Greer, Harold E. , Eugene, Oregon , USA, 1967 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. degronianum ssp yakushimanum 'Yakushima Tabata Shiro'Rhododendron Species SelectionSelected By: Iwayama, S., 1979 
            
                Subgenus: 
                
                        Hymenanthes
                    
                 | More information | 
| R. degronianum ssp yakushimanum 'Yakushima-nishiki'Rhododendron Species SelectionSelected By: Japan , no hybridiser registration, 1997 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. delavayi var adenostylumSpecies
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. denudatumSpecies
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. denudatum var glabriovariumSpecies
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. detonsumNatural HybridR. adenogynum X R. vernicosum
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. dichroanthum ssp apodectumSpecies
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. dichroanthum ssp dichroanthumSpecies
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. dichroanthum ssp scyphocalyxSpecies
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. dichroanthum ssp scyphocalyx 'Böhmen'Rhododendron Species SelectionSelected By: Wüstemeyer, W., 1974 
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. dichroanthum ssp septentrionaleSpecies
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. dignabileSpecies
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. dimitrumSpecies
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. diphrocalyxNatural HybridR. habrotrichum X ?
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. dumicolaSpecies
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. ebianenseSpecies
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. eclecteum var bellatulumSpecies
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. eclecteum var eclecteumSpecies
            
                Subgenus: 
                
                        Hymenanthes
                    
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| R. eclecteum var eclecteum 'Kingdom Come'Rhododendron Species SelectionSelected By: Clarke, S.R. , Borde Hill, West Sussex , England, 1978 
            
                Subgenus: 
                
                        Hymenanthes
                    
                 | More information |