Index

R. 'Hardy Giant'

Rhododendron Hybrid

R. fortunei ssp fortunei X R. rex ssp fictolacteum

Hybridized By: Hardgrove, D.L., 1953

R. 'Hardy Hexe'

Azalea Hybrid

? X ?

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

R. 'Hardy Madfort'

Rhododendron Hybrid

? X ?

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

R. 'Hardy Splendour'

Rhododendron Hybrid

? X ?

Hybridized By: Shapiro, B. & M.

R. 'Harkwood Friendship'

Rhododendron Hybrid

? X ?

Hybridized By: Drayson R.J.R. Wimborne, Dorset, England

R. 'Harkwood Moonlight'

Rhododendron Hybrid

? X ?

Hybridized By: Unknown

R. 'Harkwood Premiere'

Rhododendron Hybrid

R. degronianum ssp yakushimanum X R. 'Bud Flanagan'

Hybridized By: Drayson R.J.R. Wimborne, Dorset, England, 1975

R. 'Harkwood Red'

Rhododendron Hybrid

? X ?

Hybridized By: Unknown

R. 'Harkwood Supreme'

Rhododendron Hybrid

? X ?

Hybridized By: Drayson R.J.R. Wimborne, Dorset, England

R. 'Harlequin'

Azalea Hybrid

? X ?

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

R. 'Harlequin'

Azalea Hybrid

? X ?

Hybridized By: Knight & Perry | (J. Knight & T. A. Perry), Exotic Nursery, Chelsea, London | England, 1850

R. 'Harlequin'

Azalea Hybrid

? X ?

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

R. 'Harmony'

Azalea Hybrid

? X ?

Hybridized By: Pericat, A.

R. 'Harmony Group'

Rhododendron Cultivar group

? X ?

Hybridized By: Aberconway, Lord. Bodnant, Tal-y-Cafn, Wales

R. 'Harmony Mott'

Azalea Hybrid

? X ?

Hybridized By: Dosser, D.J. | Lower Wilmot, Tasmania | Australia

R. 'Harnden's White'

Rhododendron Hybrid

R. 'Albatross Group' X R. 'Hawk Group'

Hybridized By: Greer, Harold E.. Eugene, Oregon, USA, 1955

R. 'Harold Amateis'

Rhododendron Hybrid

R. maximum X R. strigillosum

Hybridized By: Amateis, Edmond. Brewster, New York, USA, 1967

R. 'Harold Epstein'

Azalea Hybrid

? X ?

Hybridized By: Waldman, P.M.

R. 'Harold Heal'

Rhododendron Hybrid

? X ?

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

R. 'Harold Stockman'

Rhododendron Hybrid

? X ?

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

R. 'Harold's Delight'

Vireya Hybrid

X R. intranervatum

Hybridized By: Unknown

R. 'Harold's Mojo'

Rhododendron Hybrid

R. 'Wilgen's Ruby' X R. 'Dexter's Spice'

Hybridized By: Stockman, M.. Port Angeles, Washington, USA, 1996

R. 'Harris Fascination'

Azalea Hybrid

R. 'Grace Freeman No. 2' X R. 'Amagasa'

Hybridized By: Harris, J.O. | Lawrenceville, Georgia | USA, 1971

R. 'Harris Parfait'

Azalea Hybrid

R. 'Sherwoodii' X R. 'Fedora'

Hybridized By: Harris, J.O. | Lawrenceville, Georgia | USA, 1970

R. 'Harrisville'

Rhododendron Hybrid

? X ?

Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1952

R. 'Harry Bertram'

Rhododendron Hybrid

? X ?

Hybridized By: Standish & Noble. Bagshot, Surrey, England, 1850

R. 'Harry Carter'

Rhododendron Hybrid

R. strigillosum X R. sutchuenense

Hybridized By: Greig, E.J.. Royston Nurseries, Vancouver Island, BC, Canada, 1983

R. 'Harry Scanlon'

Azalea Hybrid

? X ?

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

R. 'Harry Tagg'

Rhododendron Hybrid

R. 'Albescens' X R. ciliicalyx ssp ciliicalyx

Hybridized By: Edinburgh, R.B.G., 1958

R. 'Harry Van de Ven'

Azalea Hybrid

? X ?

Hybridized By: Van de Ven, H.

R. 'Harry Wu'

Vireya Hybrid

R. zoelleri X R. leucogigas

Hybridized By: Sullivan, P., 1985

R. 'Hartley Luttrell'

Rhododendron Hybrid

? X ?

Hybridized By: Standish & Noble. Bagshot, Surrey, England, 1852

R. hartleyi

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Haru-no-tsuki'

Azalea Hybrid

? X ?

Hybridized By: unknown, 1975

R. 'Haru-no-umi'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1951

R. 'Haruko'

Azalea Hybrid

? X ?

Hybridized By: Arends, W. | Wuppertal-Ronsdorf | Germany, 1960

R. 'Harvest Moon'

Rhododendron Hybrid

R. 'Mrs Lindsay Smith' X R. campylocarpum ssp campylocarpum

Hybridized By: Koster M. & Sons. Boskoop, Netherlands, 1920

R. 'Harvest Moon'

Azalea Hybrid

? X ?

Hybridized By: Waterer, H. (Knaphill) | Woking, Surrey (Knaphill) | UK, 1948

R. 'Harwell'

Azalea Hybrid

? X ?

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

R. 'Harwich'

Rhododendron Hybrid

? X ?

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

R. 'Harwood Dale'

Rhododendron Hybrid

R. 'C.I.S.' X R. 'Lem's Cameo'

Hybridized By: Mugridge, C.. Tremeirchion, St Asaph, Denbigshire Wales, UK, 1983

R. 'Has Pizzaz'

Rhododendron Hybrid

? X ?

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

R. 'Hassan'

Rhododendron Hybrid

R. 'Carl Mette' X R. catawbiense

Hybridized By: Seidel, T.J.R.. Dresden/Grüngräbchen, Germany, 1906

R. hatamense

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Hatsu-giri'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1860

R. 'Hatsu-no-hara'

Azalea Hybrid

X

Hybridized By: Japan | no hybridiser registration, 1979

R. 'Hatsu-shimo'

Azalea Hybrid

R. mucronatum var mucronatum X R. indicum

Hybridized By: Japan | no hybridiser registration, 1929

R. 'Hatsu-shimo x Tama-sugata'

Azalea Hybrid

R. 'Hatsu-shimo' X R. 'Tama-sugata'

Hybridized By: No hybridiser registered

R. 'Hatsune'

Rhododendron Hybrid

R. kawakamii X R. dauricum

Hybridized By: Hatori, M., 1976

R. 'Hawaii'

Rhododendron Hybrid

? X ?

Hybridized By: Leach, Dr. David G.. North Madison, Ohio, USA, 1967

R. 'Hawaii Sunrise'

Vireya Hybrid

R. 'macgregoriae x laetum' X R. saxifragoides

Hybridized By: Moyles, E.W.. Oakland, California, USA, 1999