Index

R. 'Ringetsu' Azalea Hybrid ? X ? More information
R. 'Ringgold' Azalea Hybrid ? X ? Hybridized By: Gable, J.B. More information
R. 'Rio' Rhododendron Hybrid R. 'Newburyport Beauty' X R. 'Newburyport Belle' Hybridized By: Leach, Dr. David G. More information
R. 'Rio de Janeiro' Rhododendron Hybrid ? X ? Hybridized By: Guyens, H.J.A. More information
R. 'Rio Rita' Vireya Hybrid R. 'Doctor Hermann Sleumer' X R. leucogigas Hybridized By: Blumhardt, O. S. More information
R. 'Ripe Corn' Rhododendron Hybrid R. 'Goldsworth Orange' X R. 'Exbury Naomi' Hybridized By: Slocock, Walter C. More information
R. 'Ripe Peach' Rhododendron Hybrid R. 'C.O.D.' X R. 'Dexter's Honeydew' Hybridized By: Knippenberg, Mrs. J. F. More information and pictures
R. 'Riplet Group' Rhododendron Hybrid R. forrestii Repens Group X R. 'Letty Edwards Group' Hybridized By: Lem Halfdan More information and pictures
R. ripleyi var basitrichum Species Subgenus: Rhododendron Section: Vireya Subsection: Euvireya More information
R. ripleyi var cryptogonium Species Subgenus: Rhododendron Section: Vireya Subsection: Euvireya More information
R. ripleyi var ripleyi Species Subgenus: Rhododendron Section: Vireya Subsection: Euvireya More information
R. ririei Species Subgenus: Hymenanthes Section: Pontica Subsection: Argyrophylla More information and pictures
R. 'Rising Sun' Azalea Hybrid ? X ? Hybridized By: Morrison, B.Y. More information
R. 'Risque' Azalea Hybrid ? X ? Hybridized By: Morrison, B.Y. More information
R. 'Rita Zvaigzne' Azalea Hybrid ? X ? Hybridized By: Kondratovičs, Rihard More information
R. 'Ritchard's Red' Rhododendron Hybrid ? X ? Hybridized By: Delp Weldon E. More information
R. 'Ritchie' Rhododendron Hybrid R. catawbiense 'Catalgla' X R. 'Sappho' Hybridized By: Delp Weldon E. More information
R. 'Ritchutissima' Azalea Hybrid ? X ? Hybridized By: Sunningdale Nursery More information
R. 'Ritenďtis' Azalea Hybrid ? X ? Hybridized By: Kondratovičs, Rihard More information
R. 'Ritzy' Rhododendron Hybrid ? X ? Hybridized By: Smith, A.L. More information
R. 'Rival' Azalea Hybrid ? X ? Hybridized By: Pericat, A. More information
R. 'Rivermist' Azalea Hybrid R. 'Sherwoodii' X R. 'Fedora' Hybridized By: Harris, J.O. More information
R. rivulare Species Subgenus: Tsutsusi Section: Tsutsusi More information
R. 'Rixte' Rhododendron Hybrid R. 'Goldsworth Orange' X R. insigne Hybridized By: Robeneck, H. More information
R. 'Road Red' Rhododendron Hybrid ? X ? Hybridized By: Steele, Captain Richard, M. More information
R. 'Roadrunner' Azalea Hybrid ? X ? Hybridized By: Motzkau, H.W. More information
R. 'Rob's Favourite' Vireya Hybrid R. viriosum X R. macgregoriae More information
R. 'Robbie Robinson' Rhododendron Hybrid ? X ? More information
R. 'Robbins Flame' Azalea Hybrid ? X ? Hybridized By: Arneson, Ivan & Robertha More information
R. 'Robbo' Rhododendron Hybrid ? X ? Hybridized By: Stockman, M. More information
R. 'Robby' Rhododendron Hybrid ? X ? Hybridized By: Delp Weldon E. More information
R. 'Robert Allison' Rhododendron Hybrid R. 'Caroline' X R. fortunei ssp discolor Hybridized By: Gable, J.B. More information and pictures
R. 'Robert Balch' Rhododendron Hybrid R. arboreum ssp zeylanicum X R. elliottii Hybridized By: Balch, R.W. More information
R. 'Robert Bates' Vireya Hybrid R. zoelleri x viriosum X R. konori var konori More information
R. 'Robert Burns' Rhododendron Hybrid ? X ? Hybridized By: Noble, C. More information
R. 'Robert Cobden' Rhododendron Hybrid ? X ? Hybridized By: Davies, I More information
R. 'Robert Coe' Rhododendron Hybrid ? X ? Hybridized By: Dexter, C.O. More information
R. 'Robert Croux' Rhododendron Hybrid ? X ? Hybridized By: Croux & Fils More information and pictures
R. 'Robert de Belder' Rhododendron Hybrid ? X ? Hybridized By: Böhlje G. D. More information and pictures
R. 'Robert de Schrijver' Azalea Hybrid ? X ? More information
R. 'Robert Earl' Azalea Hybrid ? X ? Hybridized By: Greentree, M.E. More information
R. 'Robert Fortune' Rhododendron Cultivar group R. griffithianum X R. 'H. M. Arderne' Hybridized By: Williams, Percival D. More information
R. 'Robert Hale' Rhododendron Hybrid ? X ? Hybridized By: Sifferman, Karl I. More information
R. 'Robert Keir' Rhododendron Hybrid R. lacteum X R. 'Luscombei' Hybridized By: Stevenson, J.B. More information
R. 'Robert Koch' Azalea Hybrid R. 'Cecile' X R. Gibraltar Hybridized By: Fleischmann, C. More information and pictures
R. 'Robert Korn' Rhododendron Hybrid R. 'Diane' X R. 'Gomer Waterer' Hybridized By: Korn, R. More information and pictures
R. 'Robert Louis Stevenson' Rhododendron Hybrid R. 'May Day Group' X R. 'Jester' Hybridized By: Seabrook, Cecil S. More information
R. 'Robert Schill' Rhododendron Hybrid R. 'Whitney’s Orange' X R. 'Golden Star' Hybridized By: Rosenthal, J. More information and pictures
R. 'Robert Seleger' Rhododendron Hybrid R. calostrotum ssp keleticum X ? Hybridized By: Hobbie, Dietrich G. More information and pictures
R. 'Robert Sutherland' Rhododendron Hybrid R. 'R.O. Delp' X R. 'Golden Star x Mezitt's Hardy Yellow' Hybridized By: Looye, Jack More information and pictures

Index

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R. 'Ringetsu'

Azalea Hybrid

? X ?

R. 'Ringgold'

Azalea Hybrid

? X ?

R. 'Rio'

Rhododendron Hybrid

R. 'Newburyport Beauty' X R. 'Newburyport Belle'

R. 'Rio de Janeiro'

Rhododendron Hybrid

? X ?

R. 'Rio Rita'

Vireya Hybrid

R. 'Doctor Hermann Sleumer' X R. leucogigas

R. 'Ripe Corn'

Rhododendron Hybrid

R. 'Goldsworth Orange' X R. 'Exbury Naomi'

R. 'Ripe Peach'

Rhododendron Hybrid

R. 'C.O.D.' X R. 'Dexter's Honeydew'

R. 'Riplet Group'

Rhododendron Hybrid

R. forrestii Repens Group X R. 'Letty Edwards Group'

R. ripleyi var basitrichum

Species

R. ripleyi var cryptogonium

Species

R. ripleyi var ripleyi

Species

R. ririei

Species

R. 'Rising Sun'

Azalea Hybrid

? X ?

R. 'Risque'

Azalea Hybrid

? X ?

R. 'Rita Zvaigzne'

Azalea Hybrid

? X ?

R. 'Ritchard's Red'

Rhododendron Hybrid

? X ?

R. 'Ritchie'

Rhododendron Hybrid

R. catawbiense 'Catalgla' X R. 'Sappho'

R. 'Ritchutissima'

Azalea Hybrid

? X ?

R. 'Ritenďtis'

Azalea Hybrid

? X ?

R. 'Ritzy'

Rhododendron Hybrid

? X ?

R. 'Rival'

Azalea Hybrid

? X ?

R. 'Rivermist'

Azalea Hybrid

R. 'Sherwoodii' X R. 'Fedora'

R. rivulare

Species

R. 'Rixte'

Rhododendron Hybrid

R. 'Goldsworth Orange' X R. insigne

R. 'Road Red'

Rhododendron Hybrid

? X ?

R. 'Roadrunner'

Azalea Hybrid

? X ?

R. 'Rob's Favourite'

Vireya Hybrid