Index

R. 'Shirley Peste'

Rhododendron Hybrid

? X ?

Hybridized By: Peste, F.. Shelton, Washington, USA

R. 'Shirley Rose Lent'

Rhododendron Hybrid

? X ?

Hybridized By: Nelson, B.. Squamish, Washington, USA

R. 'Shirley Scott'

Rhododendron Hybrid

? X ?

Hybridized By: Boulter, V.J.

R. 'Shirley-Jean'

Rhododendron Hybrid

? X ?

Hybridized By: Larson, H.L.. Tacoma, Washington, USA

R. 'Shiryu-no-homare'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. 'Shishu'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. shiwandashnense

Species

Subgenus: Azaleastrum
Section: Choniastrum

R. 'Shogun'

Rhododendron Hybrid

R. degronianum ssp yakushimanum X R. 'Coronation Day'

Hybridized By: Korth, A.C.. Soquel, California, USA, 1970

R. 'Shokko-nishiki'

Azalea Hybrid

? X ?

Hybridized By: unknown, 1955

R. 'Shooting Star'

Rhododendron Hybrid

? X ?

Hybridized By: Greer, Harold E.. Eugene, Oregon, USA, 1965

R. 'Shoreham'

Rhododendron Hybrid

R. 'Janet Blair' X R. 'King of Shrubs'

Hybridized By: Brack, W. (Werner). St. James, New York, USA, 1985

R. 'Short Circuit'

Rhododendron Hybrid

? X ?

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

R. 'Shorty'

Rhododendron Hybrid

R. 'Delp's Small Fry' X R. 'Hi Tech'

Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1985

R. 'Shoshi-no-hana'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1955

R. 'Shoshobeni'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration

R. 'Shot Silk Group'

Rhododendron Cultivar group

? X ?

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

R. 'Show Boat'

Rhododendron Hybrid

R. degronianum ssp yakushimanum 'Exbury Yakushimanum' X R. 'Tumalo'

Hybridized By: Phetteplace, Dr. Carl H. Leaburg, Oregon, USA, 1962

R. 'Show Glory'

Azalea Hybrid

? X ?

Hybridized By: Berna Park Nurseries

R. 'Show Time'

Rhododendron Hybrid

? X ?

Hybridized By: Clarke, George.W.. Portland Oregon, USA

R. 'Show Time'

Azalea Hybrid

? X ?

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

R. 'Show-off'

Rhododendron Hybrid

? X ?

Hybridized By: Wright, A.O.. Canby, Oregon, USA

R. 'Showa-no-homare'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration

R. 'Showa-no-kagayaki'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration

R. 'Showdown'

Rhododendron Hybrid

R. minus Carolinianum Group 'Epoch' X R. 'Hi Tech'

Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1985

R. 'Showgirl'

Rhododendron Hybrid

? X ?

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

R. 'Shozui'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. 'Shrimp'

Rhododendron Hybrid

? X ?

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

R. 'Shrimp Girl'

Rhododendron Hybrid

R. degronianum ssp yakushimanum X R. 'Fabia Tangerine'

Hybridized By: Waterer (Bagshot). Surrey, England, 1970

R. 'Shrimpfield'

Rhododendron Hybrid

R. 'Shrimp Girl' X R. 'Winkfield'

Hybridized By: McQuire, J.F.. Farnham, Surrey, England, 1987

R. 'Shugetsu'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1975

R. 'Shuho-no-hikari'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration

R. 'Shuko-no-tsuki'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration

R. 'Shukubai'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration

R. 'Shukufuku'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration

R. 'Shum-pow'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration

R. 'Shun-rei'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration

R. 'Shungaku'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration

R. 'Shungetsu'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration

R. shweliense

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Glauca

R. 'Shy Girl'

Azalea Hybrid

? X ?

Hybridized By: Elmer, G. & T.

R. 'Shyozui'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. 'Si Si'

Rhododendron Hybrid

R. degronianum ssp yakushimanum X R. 'Gold Mohur'

Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1973

R. 'Si Si x Serendipity'

Rhododendron Hybrid

R. 'Si Si' X R. 'Serendipity'

Hybridized By: No hybridiser registered

R. 'Siam'

Rhododendron Hybrid

R. catawbiense X R. degronianum ssp yakushimanum

Hybridized By: Leach, Dr. David G.. North Madison, Ohio, USA, 1952

R. sichotense

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Rhodorastra

R. 'Sid's Royal Pink'

Azalea Hybrid

? X ?

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

R. 'Sidekick'

Rhododendron Hybrid

R. minus Carolinianum Group 'Achiever' X R. 'PJM Group'

Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1979

R. sidereum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Grandia

R. sidereum 'Glen Rosa'

Rhododendron Species Selection

Selected By: National Trust for Scotland, 1964

Subgenus: Hymenanthes
Section: Pontica
Subsection: Grandia

R. siderophyllum

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Triflora

R. 'Sidestep'

Rhododendron Hybrid

? X ?

Hybridized By: Weston Nurseries