Index

R. 'Ambroise Verschaffelt'

Azalea Hybrid

? X ?

Hybridized By: Van Houtte, L. B. (Louis Benoit) | Gentbrugge | Belgium, 1868

R. 'Ambrose Bristow'

Rhododendron Hybrid

R. 'Lionel's Triumph' X R. macabeanum

Hybridized By: Robinson, M.L.A.. Forest Row, East Sussex, England, 2004

R. 'Ambrose Group'

Rhododendron Cultivar group

? X ?

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

R. 'Ambrosia'

Azalea Hybrid

R. simsii var simsii 'Vittatum' X ?

Hybridized By: Morrison, B.Y. | Pass Christian, Mississippi | USA, 1929

R. 'Ambrosianum'

Azalea Hybrid

? X ?

Hybridized By: Ambrosius, R. | Dresden | Germany

R. 'Ambrosius'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. 'Ambrosius Superbus'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. 'Ambush'

Azalea Hybrid

? X ?

Hybridized By: Waterer, H. (Knaphill) | Woking, Surrey (Knaphill) | UK

R. 'Amelia Rose'

Azalea Hybrid

R. 'Elsie Lee' X R. 'Pride of Prichard'

Hybridized By: Aromi, E.J | Mobile, Alabama | USA

R. 'America'

Rhododendron Hybrid

R. 'Parsons Grandiflorum' X ?

Hybridized By: Koster M. & Sons. Boskoop, Netherlands, 1902

R. 'America x Ann Rutledge'

Rhododendron Hybrid

R. 'America' X R. 'Umpqua Chief x War Paint'

Hybridized By: No hybridiser registered

R. 'America x Blaze'

Rhododendron Hybrid

R. 'America' X R. 'Blaze'

Hybridized By: No hybridiser registered

R. 'America x Blaze X Red Brave'

Rhododendron Hybrid

R. 'America x Blaze' X R. 'Red Brave'

Hybridized By: Unknown

R. 'America x Doctor V.H. Rutgers'

Rhododendron Hybrid

R. 'America' X R. 'Doctor V.H. Rutgers'

Hybridized By: No hybridiser registered

R. 'America x Gertrud Schäle Group'

Rhododendron Hybrid

R. 'America' X R. 'Gertrud Schäle Group'

Hybridized By: No hybridiser registered

R. 'America x Mars'

Rhododendron Hybrid

R. 'America' X R. 'Mars'

Hybridized By: No hybridiser registered

R. 'America x Nova Zembla'

Rhododendron Hybrid

R. 'America' X R. 'Nova Zembla'

Hybridized By: No hybridiser registered

R. 'America x yakushimanum'

Rhododendron Hybrid

R. 'America' X R. degronianum ssp yakushimanum

Hybridized By: No hybridiser registered

R. 'Americanum'

Rhododendron Hybrid

? X ?

Hybridized By: Lancaster, Ben, F.. Lackamas Gardens, Camas, Washington, USA, 1958

R. 'Americanum'

Azalea Hybrid

? X ?

Hybridized By: Moser & Son, 1909

R. 'Americanum'

Azalea Hybrid

? X ?

Hybridized By: Bobbink & Atkins | East Rutherford, New Jersey | USA, 1935

R. amesiae

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Triflora

R. 'Amethyst'

Rhododendron Hybrid

? X ?

Hybridized By: Dexter, C.O.. Sandwich, MA, USA

R. 'Amethyst'

Rhododendron Hybrid

R. niveum X ?

Hybridized By: Standish & Noble. Bagshot, Surrey, England, 1847

R. 'Amethyst'

Rhododendron Hybrid

R. impeditum X R. hippophaeoides var hippophaeoides

Hybridized By: Arends, G.. Wuppertal, Germany, 1949

R. 'Amethyst Ice'

Rhododendron Hybrid

? X ?

Hybridized By: Parks, J.B. (Joe). Dover, New Hampshire, USA, 1975

R. 'Amherst'

Azalea Hybrid

? X ?

Hybridized By: Stewart, Robert | Springfield, Virginia | USA, 1992

R. 'Amiblue'

Rhododendron Hybrid

R. ponticum X R. 'Whidbey Island'

Hybridized By: Stipe, W.A.. Glynneden Garden, Greenbank, Washington, USA, 1993

R. 'Amigo'

Rhododendron Hybrid

R. aberconwayi X R. 'Witch Doctor'

Hybridized By: Goheen. Dr. David. Camas, Washington, USA, 1964

R. 'Amity'

Rhododendron Hybrid

R. 'Grosclaude Group x Britannia' X R. degronianum ssp yakushimanum 'Koichiro Wada'

Hybridized By: Elliott, James A.. Astoria, Oregon, USA, 1970

R. 'Amkeys Group'

Rhododendron Cultivar group

R. ambiguum X R. keysii

Hybridized By: Magor, E.J.P.. Lamellan, St. Tudy, Cornwall, England, 1926

R. 'Ammerland'

Rhododendron Hybrid

? X ?

Hybridized By: Unknown

R. 'Ammerlandense Group'

Rhododendron Cultivar group

R. 'Britannia' X R. williamsianum

Hybridized By: Hobbie, Dietrich G.. Westerstede/Linswege, Germany, 1945

R. 'Amoena Leonardslee'

Azalea Hybrid

? X ?

Hybridized By: Unknown

R. 'Amoenum'

Rhododendron Hybrid

R. arboreum ssp arboreum X ?

Hybridized By: Booth, J., 1838

R. 'Amoenum'

Azalea Hybrid

? X ?

Hybridized By: Verschaffelt, A. (Alexander) | Ghent | Belgium, 1867

R. 'Amoenum'

Azalea Hybrid

? X ?

Hybridized By: Lindley, J., 1852

R. 'Amor'

Rhododendron Hybrid

R. griersonianum X R. thayerianum

Hybridized By: Stevenson, J.B.. Ascot, Berkshire, England, 1927

R. 'Amor Group'

Rhododendron Cultivar group

? X ?

Hybridized By: Unknown

R. 'Amphion'

Rhododendron Hybrid

R. catawbiense X ?

Hybridized By: Waterer, H. (Knaphill). Woking, Surrey (Knaphill), UK, 1890

R. amundsenianum

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Lapponica

R. 'Amy'

Rhododendron Hybrid

R. griffithianum X ?

Hybridized By: Waterer (Bagshot). Surrey, England, 1930

R. 'Amy Ann'

Rhododendron Hybrid

? X ?

Hybridized By: Henny, Rudolph. Brooks, Oregon, USA

R. 'Amy Bittinger'

Rhododendron Hybrid

? X ?

Hybridized By: Smith, W.D.. Spring Grove, Pennsylvania, USA

R. 'Amy Dennis'

Azalea Hybrid

R. 'AAP-1' X R. 'George Reynolds'

Hybridized By: Aromi, E.J | Mobile, Alabama | USA

R. 'Amy Jane'

Rhododendron Hybrid

R. degronianum ssp yakushimanum X R. 'Earl of Athlone'

Hybridized By: Stanton, D.B.. Wollongong, New South Wales, Australia, 1970

R. 'Anacape'

Vireya Hybrid

R. 'Marshall Pierce Madison' X R. javanicum ssp javanicum

Hybridized By: Unknown

R. 'Anadyomene'

Rhododendron Hybrid

? X ?

Hybridized By: Standish, J.. Bagshot, Surrey, England

R. anagalliflorum

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Anah Kruschke'

Rhododendron Hybrid

R. ponticum X R. catawbiense

Hybridized By: Kruschke, F. Nursery. Clackamas, Oregon, USA, 1948

R. 'Ananouri'

Rhododendron Hybrid

? X ?

Hybridized By: Phipps, H.. Long Island, NY, USA