Index

R. 'Robert van Oost'

Azalea Hybrid

R. 'Theodor Findeisen' X R. 'Paul Schäme'

Hybridized By: van Oost, G., 1941

R. 'Robert Weldon'

Rhododendron Hybrid

? X ?

Hybridized By: Unknown

R. 'Robert Whelan'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. 'Robert Withers'

Vireya Hybrid

R. christianae X R. aequabile

Hybridized By: Unknown

R. 'Roberta Ann'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. 'Roberta Ann x Boudoir'

Azalea Hybrid

R. 'Roberta Ann' X R. 'Boudoir'

Hybridized By: Unknown

R. 'Roberta Rae'

Rhododendron Hybrid

? X ?

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

R. 'Roberte'

Rhododendron Hybrid

R. fortunei ssp discolor X R. campylocarpum ssp campylocarpum

Hybridized By: Rothschild, L. de. Founder of Exbury Gardens, UK, 1936

R. 'Robin Hill Congo'

Azalea Hybrid

? X ?

Hybridized By: Gartrell, R. D. | Highland Farms, Black Mountain, North Carolina | USA

R. 'Robin Hill Elsa'

Azalea Hybrid

? X ?

Hybridized By: Gartrell, R. D. | Highland Farms, Black Mountain, North Carolina | USA

R. 'Robin Hill Erik'

Azalea Hybrid

? X ?

Hybridized By: Gartrell, R. D. | Highland Farms, Black Mountain, North Carolina | USA

R. 'Robin Hill Frosty'

Azalea Hybrid

? X ?

Hybridized By: Gartrell, R. D. | Highland Farms, Black Mountain, North Carolina | USA

R. 'Robin Hill Gillie'

Azalea Hybrid

R. 'Oakland X (unknown Indian azalea hybrid x Carol)' X R. 'Getsutoku'

Hybridized By: Gartrell, R. D. | Highland Farms, Black Mountain, North Carolina | USA, 1960

R. 'Robin Hill Palmyra'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. 'Robin Hill Rosanne'

Azalea Hybrid

? X ?

Hybridized By: Gartrell, R. D. | Highland Farms, Black Mountain, North Carolina | USA

R. 'Robin Hill Wendy'

Azalea Hybrid

? X ?

Hybridized By: Gartrell, R. D. | Highland Farms, Black Mountain, North Carolina | USA

R. 'Robin Hood Group'

Rhododendron Cultivar group

R. calophytum var calophytum X R. sutchuenense

Hybridized By: Williams, John Charles. Caerhays, Cornwall, England, 1933

R. 'Robinette'

Rhododendron Hybrid

R. forrestii Repens Group X R. williamsianum

Hybridized By: Aasland Nursery, 1990

R. 'Robinhood'

Azalea Hybrid

? X ?

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

R. robinsonii

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Rochelle'

Rhododendron Hybrid

? X ?

Hybridized By: Nearing, G.G.. Ramsey, NJ, USA

R. 'Rock Solid'

Rhododendron Hybrid

? X ?

Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1976

R. 'Rocket'

Rhododendron Hybrid

R. catawbiense X ?

Hybridized By: Shammarello, A.M. Euclid, Ohio, USA, 1955

R. 'Rocket'

Rhododendron Hybrid

R. meddianum var meddianum X R. strigillosum

Hybridized By: Stevenson, J.B.. Ascot, Berkshire, England, 1938

R. 'Rockhill Ivory Ruffles'

Rhododendron Hybrid

R. 'Yellow Rolls Royce' X R. 'Skipper'

Hybridized By: Unknown

R. 'Rocky Point'

Rhododendron Hybrid

R. 'Glenna' X R. 'Claire'

Hybridized By: Barlup, Jim. Bellevue, USA, 1991

R. 'Rocky River Red'

Azalea Hybrid

R. cumberlandense X R. arborescens

Hybridized By: Schild, J.E. | Hixson, Tennessee | USA, 1986

R. 'Rocky Road'

Rhododendron Hybrid

? X ?

Hybridized By: Unknown

R. 'Rocky White'

Rhododendron Hybrid

R. catawbiense 'Catalgla' X R. fortunei ssp fortunei

Hybridized By: Herbert, C., 1948

R. 'Rocky's Mom'

Vireya Hybrid

X R. javanicum ssp javanicum

Hybridized By: Unknown

R. 'Rococo'

Rhododendron Hybrid

? X ?

Hybridized By: Gable, J.B.. Stewartstown, Pennsylvania, USA

R. 'Rod'

Rhododendron Hybrid

? X ?

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

R. 'Roddy'

Azalea Hybrid

? X ?

Hybridized By: Gartrell, R. D. | Highland Farms, Black Mountain, North Carolina | USA

R. 'Rodeo'

Rhododendron Hybrid

? X ?

Hybridized By: Koster M. & Sons. Boskoop, Netherlands

R. 'Rodrigo'

Rhododendron Hybrid

R. 'Scintillation' X R. 'Karin'

Hybridized By: Hachmann, Hans. Barmstedt in Holstein, Germany, 1980

R. 'Roehr's Peggy Ann'

Azalea Hybrid

? X R. kaempferi

Hybridized By: Baumann, J. | Ghent | Belgium, 1955

R. 'Rogue'

Azalea Hybrid

? X ?

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

R. 'Rogue Red'

Vireya Hybrid

R. saxifragoides X R. womersleyi

Hybridized By: Unknown

R. 'Rohan Aidan'

Rhododendron Hybrid

R. formosum var formosum X R. 'Anne Teese'

Hybridized By: O'Shannassy, J., 1995

R. 'Roi de Hollande'

Azalea Hybrid

? X ?

Hybridized By: Vervaene, D. | Ghent | Belgium, 1868

R. 'Roi Léopold'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. 'Rokeby'

Rhododendron Hybrid

? X ?

Hybridized By: Noble, C.. Standish & Noble, Bagshot, Surrey, England, 1862

R. 'Roland'

Rhododendron Hybrid

R. 'Nova Zembla' X R. 'Purple Splendour'

Hybridized By: Hachmann, Hans. Barmstedt in Holstein, Germany, 1967

R. 'Roly Barnsley'

Rhododendron Hybrid

? X ?

Hybridized By: Behring, R.. St. Catharines, Ontario, Canada, 1976

R. 'Rolymadd Group'

Rhododendron Cultivar group

? X ?

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

R. 'Roma Sun'

Rhododendron Hybrid

? X ?

Hybridized By: Bovee Robert M.. Oswego, Oregon, USA

R. 'Romain de Smet'

Rhododendron Hybrid

? X ?

Hybridized By: Smet, L. de

R. 'Romala'

Rhododendron Hybrid

? X ?

Hybridized By: Fox, R.B.. Penjerrick, Cornwall, UK

R. 'Roman Pottery'

Rhododendron Hybrid

R. dichroanthum ssp dichroanthum X R. griersonianum

Hybridized By: Crosfield, J. J.. Embley Park, Romsey, Hampshire, UK, 1934

R. 'Romance'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. 'Romantica'

Rhododendron Hybrid

R. degronianum ssp yakushimanum X ?

Hybridized By: Gertnere, D.