Rhododendron Index

R. 'Howard Kline'

Rhododendron Hybrid

? x ?

Hybridized By: MacMullan, D. (Dennis)

R. 'Howard Kuhn'

Rhododendron Hybrid

R. degronianum ssp degronianum x R. 'Siouxon x sanguineum ssp sanguineum var haemaleum'

Hybridized By: Kuhn, H.

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R. 'Howard Short'

Rhododendron Hybrid

? x ?

Hybridized By: Short, H.A.

R. 'Howards Roberts'

Rhododendron Hybrid

R. 'Mary Belle' x R. 'Odee Wright'

Hybridized By: Minahan, J.F.

R. 'Hozan'

Evergreen Azalea Hybrid

R. indicum x ?

Hybridized By: Japan

R. huadingense

Species

Subgenus: Tsutsusi
Section: Brachycalyx

R. 'Huang Yue'

Azalea Hybrid

? x ?

R. huanum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Fortunea

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R. 'Huggy Bear'

Rhododendron Hybrid

? x ?

Hybridized By: Delp Weldon E.

R. 'Hugh Koster'

Rhododendron Hybrid

R. 'George Hardy' x ?

Hybridized By: Koster M. & Sons

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R. 'Hugh Wormald'

Deciduous Azalea Hybrid

? x ?

Hybridized By: Exbury

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R. 'Hugo Koster'

Deciduous Azalea Hybrid

R. molle ssp molle x R. molle ssp japonicum

Hybridized By: Koster & Sons

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R. huguangense

Species

Subgenus: Azaleastrum
Section: Choniastrum

R. huidongense

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Parishia

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R. 'Hullaballoo'

Rhododendron Hybrid

? x ?

Hybridized By: Loder, Sir Edmund

R. 'Hultschin'

Rhododendron Hybrid

R. insigne x R. williamsianum

Hybridized By: Robeneck, H.

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R. 'Humboldt'

Rhododendron Hybrid

R. catawbiense x ?

Hybridized By: Seidel, T.J.

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R. 'Humboldt Peppermint'

Deciduous Azalea Hybrid

? x ?

Hybridized By: Frisbie, L.F.

R. 'Humboldt Superior'

Rhododendron Hybrid

? x ?

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R. 'Humboldtii'

Rhododendron Hybrid

? x ?

Hybridized By: Standish & Noble

R. 'Humbug'

Rhododendron Hybrid

? x ?

Hybridized By: Wildfong, M.

R. 'Humdinger'

Rhododendron Hybrid

? x ?

Hybridized By: Delp Weldon E.

R. 'Humile'

Deciduous Azalea Hybrid

? x ?

Hybridized By: Loddiges, C. & Sons

R. 'Humming Bird Group'

Rhododendron Cultivar group

R. haematodes ssp haematodes x R. williamsianum

Hybridized By: Williams, John Charles

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R. 'Hummingbird'

Evergreen Azalea Hybrid

? x ?

Hybridized By: Coolidge Rare Plant gardens

R. 'Humoreska'

Rhododendron Hybrid

? x ?

Hybridized By: Kavka, B.

R. hunanense

Species

Subgenus: Tsutsusi
Section: Tsutsusi

R. 'Huneric'

Rhododendron Hybrid

? x ?

Hybridized By: Waterer (Bagshot)

R. 'Hunnewell'

Rhododendron Hybrid

? x ?

Hybridized By: de Cock, J. & Soeur

R. hunnewellianum

Species

Subgenus: Hymenanthes
Section: Pontica
Subsection: Argyrophylla

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R. 'Hunter's Moon'

Rhododendron Hybrid

? x ?

Hybridized By: Harrison, E.G.W.W.

R. 'Hunting Hill'

Rhododendron Hybrid

? x ?

Hybridized By: Dexter, C.O.

R. 'Huntsman Group'

Rhododendron Cultivar group

? x ?

R. 'Hurricane'

Rhododendron Hybrid

R. 'Mrs Furnivall' x R. 'Anna Rose Whitney'

Hybridized By: Whitney, William E.

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R. 'Huskymania'

Rhododendron Hybrid

R. 'Purpureum Grandiflorum' x ?

Hybridized By: Mehlquist, G.A.L

R. 'Hussar'

Rhododendron Hybrid

R. facetum x R. 'Fabia Group x May Day Group'

Hybridized By: Waterer (Bagshot)

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R. 'Huzzar'

Rhododendron Hybrid

? x ?

Hybridized By: Waterer (Bagshot)

R. 'Hyacinthiflorum'

Rhododendron Hybrid

R. ponticum x ?

Hybridized By: Cels

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R. hyacinthosmum

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

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R. hybridum

Natural Hybrid

R. maximum x R. viscosum

R. 'Hybridum Group'

Azaleodendron Hybrid

R. viscosum x R. maximum

R. 'Hydon Ball'

Rhododendron Hybrid

R. degronianum ssp yakushimanum x R. 'Springbok'

Hybridized By: George A.F.

R. 'Hydon Ben'

Rhododendron Hybrid

R. degronianum ssp yakushimanum x R. 'Billy Budd'

Hybridized By: George A.F.

R. 'Hydon Comet'

Rhododendron Hybrid

R. fortunei ssp fortunei x R. 'New Comet'

Hybridized By: George A.F.

R. 'Hydon Dawn'

Rhododendron Hybrid

R. degronianum ssp yakushimanum x R. 'Springbok'

Hybridized By: George A.F.

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R. 'Hydon Etna'

Rhododendron Hybrid

R. serotinum x R. 'Lava Flow'

Hybridized By: George A.F.

R. 'Hydon Glow'

Rhododendron Hybrid

R. degronianum ssp yakushimanum x R. 'Springbok'

Hybridized By: George A.F.

R. 'Hydon Gold'

Rhododendron Hybrid

R. 'New Comet' x R. 'Crest'

Hybridized By: George A.F.

R. 'Hydon Harrier'

Rhododendron Hybrid

R. 'May Day Group' x R. 'Jervis Bay'

Hybridized By: George A.F.

R. 'Hydon Hayley'

Rhododendron Hybrid

R. fortunei ssp fortunei x R. 'New Comet'

Hybridized By: George A.F.