Index

R. 'Hermes'

Azalea Hybrid

? X ?

Hybridized By: Seidel, T.J.H.

R. 'Hermine Seidel'

Rhododendron Hybrid

? X ?

Hybridized By: Seidel, T.J.R.

R. 'Hernando'

Rhododendron Hybrid

? X ?

Hybridized By: Goheen. Dr. David

R. 'Hero'

Rhododendron Hybrid

R. 'Gloria Ganavensis' X R. catawbiense

Hybridized By: Seidel, T.J.R.

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R. 'Hershey's Orange'

Azalea Hybrid

? X ?

Hybridized By: Hershey, R.

R. 'Hershey's Red'

Azalea Hybrid

? X ?

Hybridized By: Hershey, R.

More information and pictures

R. 'Hershey's Red Tetra'

Azalea Hybrid

? X ?

Hybridized By: USDA, Department of Agriculture

R. herzogii

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'herzogii x laetum'

Vireya Hybrid

R. herzogii X R. laetum

R. 'Hesse's Biggi'

Rhododendron Hybrid

? X ?

Hybridized By: Hesse, H.

R. 'Hesse's Nerisha'

Rhododendron Hybrid

? X ?

Hybridized By: Hesse, H.

R. heteroclitum

Species

Subgenus: Rhododendron
Section: Pogonanthum

R. heterolepis

Species

Subgenus: Rhododendron
Section: Vireya
Subsection: Euvireya

R. 'Heureuse Surprise'

Azalea Hybrid

? X ?

Hybridized By: Sunningdale Nursery

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R. 'Hexe'

Azalea Hybrid

R. 'Amoenum' X R. 'Duc de Nassau'

Hybridized By: Forster, O.

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R. 'Hexe de Saffelaere'

Azalea Hybrid

R. 'Professeur Wolters' X R. 'Hexe'

Hybridized By: Van Hecke, A.

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R. 'Hexe Grandiflora'

Azalea Hybrid

? X ?

Hybridized By: Haerens, A.

R. 'Hexe Grandis'

Azalea Hybrid

? X ?

Hybridized By: Haerens, A.

R. 'Hexe Prima'

Azalea Hybrid

? X ?

Hybridized By: Steyaert, A.

R. 'Hexe Rosea'

Azalea Hybrid

? X ?

Hybridized By: Haerens, A.

R. 'Hexe x Ernst Thiers'

Azalea Hybrid

R. 'Hexe' X R. 'Ernst Thiers'

R. 'Hexe x Vervaeneanum'

Azalea Hybrid

R. 'Hexe' X R. 'Vervaeneanum'

Hybridized By: No IRRC registration data

R. 'Hi Tech'

Rhododendron Hybrid

R. 'minus Carolinianum Group x fastigiatum' X R. 'minus Carolinianum Group x Blue Diamond'

Hybridized By: Looye, Jack

R. 'Hiawatha'

Azalea Hybrid

? X ?

Hybridized By: Waterer, H. (Knaphill)

R. 'Hiawatha'

Azalea Hybrid

? X ?

Hybridized By: Sander, C.

R. 'Hiawatha'

Azalea Hybrid

? X ?

Hybridized By: Pericat, A.

R. 'Hiawatha'

Azalea Hybrid

? X ?

Hybridized By: Bobbink &

R. 'Hiawatha'

Rhododendron Hybrid

? X ?

Hybridized By: Stokes, W.E.

R. 'Hiawatha Group'

Rhododendron Cultivar group

? X ?

Hybridized By: Aberconway, Lord

R. hidakanum

Species

Subgenus: Tsutsusi
Section: Brachycalyx

R. 'Higasa'

Azalea Hybrid

R. Banko X R. Shinnyo-no-tsuki

Hybridized By: Japan

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R. 'High Gold'

Rhododendron Hybrid

R. 'Damaris Group' X R. 'Crest'

Hybridized By: Eichelser, John E.

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R. 'High Regard'

Rhododendron Hybrid

R. fortunei ssp discolor X R. 'maximum x fortunei'

Hybridized By: Scott Arboretum

R. 'High Sheriff'

Rhododendron Hybrid

R. decorum ssp decorum X R. williamsianum

Hybridized By: Williams, F.J.

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R. 'High Society'

Rhododendron Hybrid

R. degronianum ssp yakushimanum X R. dichroanthum ssp scyphocalyx

Hybridized By: Boswells Nurseries

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R. 'High Summer'

Rhododendron Hybrid

R. 'Mrs J G Millais' X R. 'Inamorata Group'

Hybridized By: Millais, E.G.

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R. 'High Tide'

Azalea Hybrid

? X ?

Hybridized By: Aromi, E.J

R. 'High Times'

Azalea Hybrid

? X ?

Hybridized By: Aromi, E.J

R. 'High Voltage'

Rhododendron Hybrid

R. 'Yak Van Zile x Mrs W R Coe' X R. 'Dead Ringer'

Hybridized By: Trautmann, C.

R. 'Highborn'

Rhododendron Hybrid

R. nuttallii X R. 'Alf Bramley'

Hybridized By: O'Rourke, H.

R. 'Highland Arabesque'

Vireya Hybrid

R. orbiculatum X R. 'laetum x aurigeranum'

Hybridized By: Rouse, J.L.

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R. 'Highland Flynn'

Rhododendron Hybrid

? X ?

R. 'Highnoon'

Rhododendron Hybrid

R. 'Earl of Athlone' X R. 'Fabia Group'

Hybridized By: Henny, Rudolph

R. 'Hilda Margaret'

Rhododendron Hybrid

R. 'Carita Group' X R. fortunei ssp fortunei

Hybridized By: Reuthe, W.S.

R. 'Hilda Niblett'

Azalea Hybrid

R. 'Glacier x Tama-giku' X R. 'Getsutoku'

Hybridized By: Gartrell, R. D.

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R. 'Hildegard'

Rhododendron Hybrid

? X ?

Hybridized By: Seidel, T.J.

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R. 'Hill Ayah'

Rhododendron Hybrid

R. fortunei ssp discolor X R. facetum

Hybridized By: Magor, E.J.P.

R. 'Hill's Bright Red'

Rhododendron Hybrid

R. 'Elizabeth Group' X R. 'Kilimanjaro Group'

Hybridized By: Hill, W.

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R. 'Hill's Low Red'

Rhododendron Hybrid

? X ?

Hybridized By: Hill, W.

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R. 'Hillcrest'

Rhododendron Hybrid

? X ?

Hybridized By: Esch, B.

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