Index

R. 'Ogaretta'

Rhododendron Hybrid

R. 'Grierosplendour Group' X R. fortunei ssp fortunei

Hybridized By: Means, R.L., 1986

R. 'Ogi-kasane'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1929

R. 'Ogi-nagashi'

Azalea Hybrid

? X ?

Hybridized By: Ito, Ihei | Register from 1692 | Japan, 1692

R. 'Ogon-no-mai'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1987

R. 'Ogon-no-taki'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1975

R. 'Ogon-no-tsuki'

Azalea Hybrid

X ?

Hybridized By: Japan | no hybridiser registration, 1979

R. 'Ogurayama'

Azalea Hybrid

? X ?

Hybridized By: Ito, Ihei | Register from 1692 | Japan, 1692

R. 'Oh Heavens'

Azalea Hybrid

R. 'Kagetsu x Silver Cup' X R. 'Masterpiece'

Hybridized By: Hager, D. | Hager Nurseries, Spotsylvania, Virginia | USA, 1984

R. 'Oh Joy'

Rhododendron Hybrid

? X ?

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

R. 'Oh Joyce'

Rhododendron Hybrid

R. 'smirnowii x yakushimanum' X R. 'Joyce Lyn'

Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1989

R. 'Oh My'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1928

R. 'Oh My!'

Rhododendron Hybrid

R. smirnowii X R. degronianum ssp yakushimanum

Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1968

R. 'Oh My! x Catalgla'

Rhododendron Hybrid

R. 'Oh My!' X R. catawbiense 'Catalgla'

Hybridized By: No hybridiser registered

R. 'Oh My! x Mary Belle'

Rhododendron Hybrid

R. 'Oh My!' X R. 'Mary Belle'

Hybridized By: No hybridiser registered

R. 'Oh My! x Nova Zembla'

Rhododendron Hybrid

R. 'Oh My!' X R. 'Nova Zembla'

Hybridized By: No hybridiser registered

R. 'Oh Nuts'

Azalea Hybrid

R. 'Harbinger' X R. 'Hatsu-shimo'

Hybridized By: Hager, D. | Hager Nurseries, Spotsylvania, Virginia | USA, 1984

R. 'Oh Woa!'

Rhododendron Hybrid

R. 'Masterblend' X R. 'Jennypoo'

Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1999

R. 'Oh! Johnny'

Rhododendron Hybrid

? X ?

Hybridized By: Whitney, William E.. Brinnon, Washington, USA, 1977

R. 'Oh! Kitty'

Rhododendron Hybrid

? X ?

Hybridized By: Minch, F.. Puyallup, Washington, USA, 1973

R. 'OH-1'

Azalea Hybrid

? X ?

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

R. 'Oh-Too'

Rhododendron Hybrid

R. 'China Group' X R. 'Goldbug'

Hybridized By: Elliott, W., 1964

R. 'Ohio'

Azalea Hybrid

? X ?

Hybridized By: Chisholm, J.J., 1934

R. 'Ohio Pink'

Rhododendron Hybrid

R. degronianum ssp yakushimanum X ?

Hybridized By: Ford, J.E., 1973

R. 'Ohio Pink Blush'

Rhododendron Hybrid

R. degronianum ssp yakushimanum X ?

Hybridized By: Ford, J.E., 1974

R. 'Ohio Pink Glo'

Rhododendron Hybrid

R. degronianum ssp yakushimanum X ?

Hybridized By: Ford, J.E., 1973

R. 'Ohio White'

Rhododendron Hybrid

R. degronianum ssp yakushimanum X ?

Hybridized By: Ford, J.E., 1974

R. 'Oie-murasaki'

Azalea Hybrid

? X ?

Hybridized By: Ito, Ihei | Register from 1692 | Japan, 1692

R. 'Oimatsu'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1920

R. 'Oino-mezane'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1918

R. 'Oji-kasane'

Azalea Hybrid

? X ?

Hybridized By: Japan | no hybridiser registration, 1929

R. 'Ok Tedi Gold'

Vireya Hybrid

R. 'Tropic Glow' X R. lacteum

Hybridized By: Cullinane, M.D., 1980

R. 'Oklahoma'

Rhododendron Hybrid

R. 'Bellerophon Group' X R. 'Tally Ho Group'

Hybridized By: Rothschild, L. de. Founder of Exbury Gardens, UK, 1948

R. 'Oklahoma Group'

Rhododendron Cultivar group

R. 'Bellerophon Group' X R. 'Tally Ho Group'

Hybridized By: Rothschild, L. de. Founder of Exbury Gardens, UK, 1948

R. 'Oku-murasaki'

Azalea Hybrid

? X ?

Hybridized By: Ito, Ihei | Register from 1692 | Japan, 1692

R. 'Olan Ragan'

Rhododendron Hybrid

? X ?

Hybridized By: Ragan, W.A, 1969

R. 'Old Cardinal'

Rhododendron Hybrid

? X ?

Hybridized By: Crosfield, J. J.. Embley Park, Romsey, Hampshire, UK, 1931

R. 'Old Copper'

Rhododendron Hybrid

R. 'Vulcan' X R. 'Fabia Group'

Hybridized By: van Veen, T. (includes Sr. & Junior). Portland, Oregon, USA, 1948

R. 'Old Copper x Mrs T H Lowinsky'

Rhododendron Hybrid

R. 'Old Copper' X R. 'Mrs T H Lowinsky'

Hybridized By: Unknown

R. 'Old Faithful'

Rhododendron Hybrid

? X R. 'Mars'

Hybridized By: Haag, C.R. & V. (Velma). Brevard, NC, USA, 1991

R. 'Old Faithful'

Azalea Hybrid

R. yedoense var poukhanense X R. kaempferi

Hybridized By: Gable, J.B. | Stewartstown, Pennsylvania | USA, 1958

R. 'Old Gold'

Azalea Hybrid

? X ?

Hybridized By: Exbury | The Rothschild Estate, Hampshire | England, 1951

R. 'Old Lace'

Rhododendron Hybrid

R. 'Chionoides' X ?

Hybridized By: Fretz, L., 1998

R. 'Old Ming'

Azalea Hybrid

? X ?

Hybridized By: Coolidge Rare Plant gardens, 1958

R. 'Old Port'

Rhododendron Hybrid

R. ponticum X ?

Hybridized By: Waterer, H. (Knaphill). Woking, Surrey (Knaphill), UK, 1865

R. 'Old Rose'

Azalea Hybrid

? X ?

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

R. 'Old Spice'

Rhododendron Hybrid

R. decorum ssp decorum X R. 'Azor Group'

Hybridized By: Lancaster, Ben, F.. Lackamas Gardens, Camas, Washington, USA, 1948

R. 'Old Wine'

Azalea Hybrid

? X ?

Hybridized By: Coolidge Rare Plant gardens, 1940

R. 'Oldenburg Group'

Rhododendron Cultivar group

R. fortunei ssp discolor X R. williamsianum

Hybridized By: Hobbie, Dietrich G.. Westerstede/Linswege, Germany, 1943

R. 'Oldenburgia'

Rhododendron Hybrid

? X ?

Hybridized By: Walther, C.J.H., 1870

R. 'Oldewig'

Rhododendron Hybrid

R. catawbiense X ?

Hybridized By: Seidel, T.J.R.. Dresden/Grüngräbchen, Germany, 1904

R. oldhamii

Species

Subgenus: Tsutsusi
Section: Tsutsusi