Index

R. rufescens

Species

Subgenus: Rhododendron
Section: Pogonanthum

R. 'Ruffled Giant'

Azalea Hybrid

? X ?

Hybridized By: Camellia Lodge Nursery, 1980

R. 'Ruffled Rim'

Rhododendron Hybrid

R. 'Ben Moseley' X R. 'Old Port'

Hybridized By: Schram, B., 1992

R. 'Ruffles and Frills'

Rhododendron Hybrid

R. 'Hydon Glow' X R. 'Lem's Cameo'

Hybridized By: Wildfong, M., 1976

R. rufohirtum

Species

Subgenus: Tsutsusi
Section: Tsutsusi

R. rufosquamosum

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Maddenia

R. rufulum

Species

Subgenus: Tsutsusi
Section: Tsutsusi

R. rufum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Taliensia

R. 'Rufus'

Azalea Hybrid

? X ?

Hybridized By: Wells Nursery, 1978

R. rugosum var kinabaluense

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. rugosum var rugosum

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Rumpelstilzchen'

Rhododendron Hybrid

R. degronianum ssp yakushimanum X R. dichroanthum ssp dichroanthum

Hybridized By: Nagel, W. (Walter). Bretten, Baden, Germany, 1970

R. 'Runaway'

Rhododendron Hybrid

R. 'Tony's Gift' X R. 'Maxhaem Salmon'

Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1975

R. rupicola var chryseum

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Lapponica

R. rupicola var muliense

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Lapponica

R. rupicola var rupicola

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Lapponica

R. rupivalleculatum

Species

Subgenus: Rhododendron
Section: Pseudovireya

R. rushforthii

Species

Subgenus: Rhododendron
Section: Pseudovireya

R. russatum

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Lapponica

R. russatum 'Albiflorum'

Rhododendron Species Selection

Selected By: Firma C. Esveld, 1984

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Lapponica

R. russatum 'Cook's Russatum'

Rhododendron Species Selection

Selected By: Unknown

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Lapponica

R. russatum 'Loft House'

Rhododendron Species Selection

Selected By: Unknown

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Lapponica

R. russatum 'Murasaki-suishiou'

Rhododendron Species Selection

Selected By: Firma C. Esveld

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Lapponica

R. russatum 'Night Editor'

Rhododendron Species Selection

Selected By: Unknown

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Lapponica

R. russatum 'Purple Pillow'

Rhododendron Species Selection

Selected By: Faragher, C.

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Lapponica

R. 'russatum x saluenense'

Rhododendron Hybrid

R. russatum X R. saluenense ssp saluenense

Hybridized By: No hybridiser registered

R. 'Russautinii Group'

Rhododendron Hybrid

R. russatum X R. augustinii ssp augustinii

Hybridized By: Ramsden, Sir John. Muncaster Castle, UK

R. 'Russell Harmon'

Rhododendron Hybrid

R. catawbiense X R. maximum

Hybridized By: Harmon, R., 1950

R. 'Russell Harmon x Goldsworth Orange'

Rhododendron Hybrid

R. 'Russell Harmon' X R. 'Goldsworth Orange'

Hybridized By: No hybridiser registered

R. 'Russellianum'

Rhododendron Hybrid

? X ?

Hybridized By: Unknown

R. 'Russellianum Group'

Rhododendron Cultivar group

R. catawbiense X R. arboreum ssp arboreum

Hybridized By: Russell, 1831

R. 'Russian Castle'

Rhododendron Hybrid

? X ?

Hybridized By: Tolstead, W.L.. Davis and Elkins College, Elkins, WV, USA

R. 'Rustic Cloud'

Rhododendron Hybrid

? X ?

Hybridized By: Sandwich Club, 1970

R. 'Rustic Maid Group'

Rhododendron Cultivar group

R. russatum X R. 'Blue Diamond Group'

Hybridized By: Ingram, C.. Benenden, Kent, England

R. 'Rusty Nail'

Rhododendron Hybrid

R. 'Yaku Sunrise' X R. 'Bambi x proteoides #16'

Hybridized By: Blansit, N. (Nolan). Cottage Grove, Oregon, USA, 1996

R. 'Ruth Gebert'

Rhododendron Hybrid

? X ?

Hybridized By: Anderson, E. T. Mrs. Longview, Washington, USA

R. 'Ruth Hansen'

Rhododendron Hybrid

? X ?

Hybridized By: Phetteplace, Dr. Carl H. Leaburg, Oregon, USA

R. 'Ruth Marthine'

Rhododendron Hybrid

? X ?

Hybridized By: Anderson, E. T. Mrs. Longview, Washington, USA

R. 'Ruth May'

Azalea Hybrid

R. 'Azuma kagami' X R. 'Sekidera'

Hybridized By: Oliver & Simson Nurseries, 1964

R. 'Ruth Mottley'

Rhododendron Hybrid

? X R. 'Lem's Cameo'

Hybridized By: Robertson, W.. Auburn, WA, USA, 1975

R. 'Ruth Otte'

Rhododendron Hybrid

? X ?

Hybridized By: Hobbie, Dietrich G.. Westerstede/Linswege, Germany

R. 'Ruth Otte x Feuerschein'

Rhododendron Hybrid

R. 'Ruth Otte' X R. 'Feuerschein'

Hybridized By: No hybridiser registered

R. 'Ruth Ticknor'

Azalea Hybrid

? X ?

Hybridized By: Guttormsen, W.L. | Greenwood Gardens, Canby, Oregon | USA, 1975

R. 'Ruth Tracy'

Rhododendron Hybrid

R. williamsianum X R. 'Vera Elliott'

Hybridized By: Elliott, W., 1980

R. 'Ruth's Showstopper'

Rhododendron Hybrid

R. 'Tolstead's Ma Belle' X R. 'Virginia Delp'

Hybridized By: Doppel,J.. Lenharstville, PA, USA, 2000

R. 'Ruth's Sister'

Rhododendron Hybrid

? X ?

Hybridized By: Doppel,J.. Lenharstville, PA, USA, 2000

R. 'Ruthelma Group'

Rhododendron Cultivar group

? X ?

Hybridized By: Loder, Sir Edmund. Horsham, Sussex, England

R. 'Ruthy's Red'

Azalea Hybrid

R. 'Christina' X R. 'Shinnyo-no-tsuki'

Hybridized By: Clagett, W.L. (Buck) | USA | Derwood, Maryland, 1989

R. 'Rutilans'

Azalea Hybrid

? X ?

Hybridized By: Loddiges, C. & Sons | Hackney, London | England, 1804

R. ruttenii

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Ruususen Uni'

Azalea Hybrid

? X ?

Hybridized By: Mustila Arboretum