Index

R. 'Trelan White Splash'

Rhododendron Hybrid

? X ?

Hybridized By: Witherwick, G.T.

R. 'Tressa McMurry'

Azaleodendron Hybrid

R. occidentale X R. ponticum

Hybridized By: McMurry, 1966

R. 'Treuscoat'

Rhododendron Hybrid

R. 'Lord Roberts' X R. 'Karen Triplett'

Hybridized By: Le Duigou, L., 2000

R. 'Trewithen Orange'

Rhododendron Hybrid

R. 'Full House Group' X R. cinnabarinum ssp xanthocodon Concatenans Group

Hybridized By: Johnstone G.H.. Trewithin, Cornwall, England, 1950

R. 'Trewithen Orange Group'

Rhododendron Cultivar group

R. 'Full House Group' X R. cinnabarinum ssp xanthocodon Concatenans Group

Hybridized By: Johnstone G.H.. Trewithin, Cornwall, England, 1950

R. 'Tri-Lights'

Azalea Hybrid

R. atlanticum X ?

Hybridized By: Pellet, H. | University of Minnesota Landscape Arboretum | USA, 1978

R. 'Trianon'

Rhododendron Hybrid

? X ?

Hybridized By: Unknown

R. trichanthum

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Triflora

R. trichanthum 'Honey Wood'

Rhododendron Species Selection

Selected By: Stevenson, J.B. , Ascot, Berkshire , England, 1969

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Triflora

R. trichocladum

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Trichoclada

R. trichogynum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Taliensia

R. trichophorum

Natural Hybrid

R. trichanthum X R. augustinii ssp augustinii

R. trichostomum

Species

Subgenus: Rhododendron
Section: Pogonanthum

R. trichostomum 'Collingwood Ingram'

Rhododendron Species Selection

Selected By: Unknown

Subgenus: Rhododendron
Section: Pogonanthum

R. trichostomum Ledoides Group

Species

Subgenus: Rhododendron
Section: Pogonanthum

R. trichostomum Ledoides Group 'Lakeside'

Rhododendron Species Selection

Selected By: Crown Estate Commissioners , Windsor, Berkshire , England, 1972

Subgenus: Rhododendron
Section: Pogonanthum

R. trichostomum 'Quarry Wood'

Rhododendron Species Selection

Selected By: Simmons, M. Mrs., 1971

Subgenus: Rhododendron
Section: Pogonanthum

R. trichostomum Radinum Group

Species

Subgenus: Rhododendron
Section: Pogonanthum

R. trichostomum 'Rae Berry'

Rhododendron Species Selection

Selected By: Berry, Mrs A.C.U., 1962

Subgenus: Rhododendron
Section: Pogonanthum

R. trichostomum 'Schneeflöckchen'

Rhododendron Species Selection

Selected By: Unknown

Subgenus: Rhododendron
Section: Pogonanthum

R. trichostomum 'Sweet Bay'

Rhododendron Species Selection

Selected By: Crown Estate Commissioners , Windsor, Berkshire , England, 1960

Subgenus: Rhododendron
Section: Pogonanthum

R. triflorum var bauhiniiflorum

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Triflora

R. triflorum var triflorum

Species

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Triflora

R. triflorum var triflorum 'Taiping'

Rhododendron Species Selection

Selected By: Hansen Ruth , Portland Oregon , USA, 1967

Subgenus: Rhododendron
Section: Rhododendron
Subsection: Triflora

R. 'Trilby'

Rhododendron Hybrid

R. 'Queen Wilhelmina' X R. 'Stanley Davies'

Hybridized By: van Nes C. B . & Sons. Boskoop, Netherlands, 1930

R. trilectorum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Neriiflora

R. 'Trina'

Rhododendron Hybrid

R. 'Coral Blossom' X R. 'Tia'

Hybridized By: Barlup, Jim. Bellevue, USA, 2000

R. 'Trinidad'

Rhododendron Hybrid

R. 'Calcutta' X R. 'Tahiti'

Hybridized By: Leach, Dr. David G.. North Madison, Ohio, USA, 1960

R. 'Trinity'

Rhododendron Hybrid

R. catawbiense 'Powell Glass' X R. degronianum ssp yakushimanum 'Koichiro Wada'

Hybridized By: Pride, O.S.. Butler, Pennsylvania, USA, 1961

R. 'Triple A'

Rhododendron Hybrid

R. minus Carolinianum Group X R. impeditum

Hybridized By: Brueckner, J.B.. Mississauga, Ontario, Canada, 1970

R. 'Tripoli'

Rhododendron Hybrid

? X ?

Hybridized By: Leach, Dr. David G.. North Madison, Ohio, USA, 1980

R. 'Tripoli'

Rhododendron Hybrid

? X ?

Hybridized By: Dexter, C.O.. Sandwich, MA, USA, 1943

R. 'Tripsdrill'

Rhododendron Hybrid

R. 'Tarantella' X R. 'Elizabeth de Rothschild Group'

Hybridized By: Hachmann, Hans. Barmstedt in Holstein, Germany, 1986

R. 'Trisha'

Azalea Hybrid

? X ?

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

R. 'Trisha Tilly'

Azalea Hybrid

? X ?

Hybridized By: Greentree, M.E.

R. 'Tristan'

Azalea Hybrid

? X ?

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

R. 'Tristan Esposito'

Rhododendron Hybrid

? X ?

Hybridized By: Van de Ven K.. Olinda, Victoria, Australia

R. 'Tristar'

Rhododendron Hybrid

? X ?

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

R. 'Triton'

Vireya Hybrid

R. javanicum ssp javanicum X R. multicolor

Hybridized By: Unknown

R. 'Triumph'

Azalea Hybrid

R. 'Madame Auguste Haerens' X R. 'Easter Greetings'

Hybridized By: Haerens, A. | St. Amandsberg | Belgium, 1923

R. 'Triumph x Beni-kirishima'

Azalea Hybrid

R. 'Triumph' X R. 'Beni-kirishima'

Hybridized By: No hybridiser registered

R. triumphans

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Triumphans'

Vireya Hybrid

R. 'Princess Royal' X R. javanicum ssp javanicum

Hybridized By: Unknown

R. 'Triumphans Gandanense'

Azalea Hybrid

? X ?

Hybridized By: Verschaffelt, A. (Alexander) | Ghent | Belgium, 1844

R. 'Triumphans x javanicum'

Vireya Hybrid

R. 'Triumphans' X R. javanicum ssp javanicum

Hybridized By: No hybridiser registered

R. 'Troas Group'

Rhododendron Cultivar group

? X ?

Hybridized By: Unknown

R. 'Trocadero'

Rhododendron Hybrid

R. 'Torero' X R. 'Erato'

Hybridized By: Hachmann, Hans. Barmstedt in Holstein, Germany, 1984

R. 'Trojan Warrior'

Rhododendron Hybrid

? X ?

Hybridized By: Mezitt, E.V.. Weston Nurseries, Hopkinton, Massachusetts, USA

R. 'Tromba'

Rhododendron Hybrid

R. 'Gartendirektor Glocker' X R. 'Buketta'

Hybridized By: Hachmann, Hans. Barmstedt in Holstein, Germany, 1975

R. 'Trompenburg'

Rhododendron Hybrid

? X ?

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

R. 'Tropic Alpine Brilliant'

Vireya Hybrid

X R. commonae

Hybridized By: Unknown