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R. 'Hypermax'

(R. hyperythrum ) X (R. maximum )

	Require Seed X Pollen in the Same Positions
	Require R. hyperythrum
	Require R. maximum

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R. 'Cornelia Sanders' Rhododendron Hybrid R. hyperythrum X R. degronianum ssp yakushimanum Hybridized By: Sanders, S & C. Bethesda, Maryland, USA More information and pictures
R. 'hyperythrum x The Honourable Jean Marie de Montague' Rhododendron Hybrid R. hyperythrum X R. 'The Honourable Jean Marie de Montague' Hybridized By: No hybridiser registered	More information
R. 'Quaker Girl Group' Rhododendron Cultivar group R. hyperythrum X R. 'Avalanche Group' Hybridized By: Rothschild, Edmund Leopold de. Southampton, UK, 1950	More information
R. 'Ring's Early Splendor' Rhododendron Hybrid R. hyperythrum X R. catawbiense 'Catalgla' Hybridized By: Ring, T.L.. Bellaire, Ohio, USA, 1979 More information and pictures
R. 'Peppermint Twist' Rhododendron Hybrid R. hyperythrum X R. 'Princess Elizabeth' Hybridized By: Thornton, J.T., 1992 More information and pictures
R. 'Martha Player' Rhododendron Hybrid R. hyperythrum X R. 'Mrs Sam' Hybridized By: Player, L. M.. Fayetteville, North Carolina, USA, 1998 More information and pictures
R. 'Boomer' Rhododendron Hybrid R. hyperythrum X R. 'Sham's Ruby' Hybridized By: Thornton, J.T., 1990	More information
R. 'Pure Cream' Rhododendron Hybrid R. hyperythrum X R. 'Crest' Hybridized By: Rothschild, Edmund Leopold de. Southampton, UK, 1988	More information
R. 'Zyuni-hitoe' Rhododendron Hybrid R. degronianum ssp yakushimanum 'Koichiro Wada' X R. hyperythrum Hybridized By: Saito, S., 1993	More information
R. 'Elizabeth Ard' Rhododendron Hybrid R. 'English Roseum' X R. hyperythrum Hybridized By: Pushepetappa Gardens, 1944	More information
R. 'Michele Smith' Rhododendron Hybrid R. 'Scintillation' X R. hyperythrum Hybridized By: Thornton, J.T., 1994 More information and pictures
R. 'metternichii x hyperythrum' Rhododendron Hybrid R. degronianum ssp degronianum X R. hyperythrum Hybridized By: Unknown More information and pictures
R. 'CeeCee' Rhododendron Hybrid R. 'Vulcan' X R. hyperythrum Hybridized By: Southerland, Stan B.. Chapel Hill, NC, USA, 1997	More information
R. 'decorum x hyperythrum' Rhododendron Hybrid R. decorum ssp decorum X R. hyperythrum Hybridized By: No hybridiser registered	More information
R. 'Woodcock' Rhododendron Hybrid R. 'Elizabeth Group' X R. hyperythrum Hybridized By: Hanger, F.E.W.. RHS Garden, Wisley, Surrey, England, 1952	More information
R. 'Breezy' Rhododendron Hybrid R. 'Janet Blair' X R. hyperythrum Hybridized By: Thornton, J.T., 1989	More information
R. 'Starglider' Rhododendron Hybrid R. 'Tols' X R. hyperythrum Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1992	More information
R. 'aureum x maximum' Rhododendron Hybrid R. aureum var aureum X R. maximum Hybridized By: No hybridiser registered	More information
R. 'Whizette' Rhododendron Hybrid R. 'Princess Elizabeth' X R. maximum Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1992	More information
R. 'Ignescens' Rhododendron Hybrid R. arboreum ssp arboreum X R. maximum Hybridized By: Rogers, W.H. & Son, 1932	More information
R. 'Russell Harmon' Rhododendron Hybrid R. catawbiense X R. maximum Hybridized By: Harmon, R., 1950 More information and pictures
R. 'Ghost' Rhododendron Hybrid R. 'maximum x yakushimanum' X R. maximum Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1974	More information
R. 'Mrs Sam' Rhododendron Hybrid R. catawbiense X R. maximum Hybridized By: Unknown More information and pictures
R. 'Edith Pride' Rhododendron Hybrid R. 'English Roseum' X R. maximum Hybridized By: Pride, O.S.. Butler, Pennsylvania, USA, 1958 More information and pictures
R. 'Golly Gee' Rhododendron Hybrid R. 'Donna Hardgrove' X R. maximum Hybridized By: Ring, T.L.. Bellaire, Ohio, USA, 1977	More information
R. 'Jean Leppo' Rhododendron Hybrid R. catawbiense X R. maximum Hybridized By: Smith, W.D.. Spring Grove, Pennsylvania, USA, 1969	More information
R. 'Seven Up' Rhododendron Hybrid R. aureum var aureum X R. maximum Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1995	More information
R. 'yakushimanum x maximum' Rhododendron Hybrid R. degronianum ssp yakushimanum X R. maximum Hybridized By: No hybridiser registered	More information
R. 'Dona Maria' Rhododendron Hybrid R. ponticum X R. maximum Hybridized By: de Clerck d'Olsene, 1855	More information
R. 'Powerhouse' Rhododendron Hybrid R. 'America x Doctor V.H. Rutgers' X R. maximum Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1974 More information and pictures
R. 'Ponticum Roseum' Rhododendron Hybrid R. ponticum X R. maximum Hybridized By: Pride, O.S.. Butler, Pennsylvania, USA, 1958 More information and pictures
R. 'Delp's Snowball' Rhododendron Hybrid R. aureum var aureum X R. maximum Hybridized By: Delp Weldon E.. Harrisville, Pensylvania, USA, 1995	More information
R. 'Halopeanum' Azalea Hybrid R. griffithianum X R. maximum Hybridized By: Halopé, F, 1896 More information and pictures
R. 'Hybridum Group' Azaleodendron Hybrid R. viscosum X R. maximum Hybridized By: Herbert, Honourable & Reverend W. \| Wetherby, Yorkshire \| England, 1817	More information
R. 'ponticum x maximum' Azaleodendron Hybrid R. ponticum X R. maximum Hybridized By: No hybridiser registered	More information
R. 'Queen Victoria' Rhododendron Hybrid R. maximum X R. 'Altaclerense Group' Hybridized By: Standish & Noble. Bagshot, Surrey, England, 1850	More information
R. 'Alumni Day' Rhododendron Hybrid R. maximum X R. fortunei ssp discolor Hybridized By: Nearing, G.G.. Ramsey, NJ, USA, 1958	More information
R. 'Cool Trend' Rhododendron Hybrid R. maximum X R. 'Buttermint' Hybridized By: Ring, T.L.. Bellaire, Ohio, USA, 1986	More information
R. 'Eileen' Rhododendron Hybrid R. maximum X ? Hybridized By: Waterer (Bagshot). Surrey, England, 1920	More information
R. 'Elizabeth Scholtz' Rhododendron Hybrid R. maximum X ? Hybridized By: Smith, W.D.. Spring Grove, Pennsylvania, USA, 1962	More information
R. 'Lady Annette de Trafford' Rhododendron Hybrid R. maximum X ? Hybridized By: Waterer, H. (Knaphill). Woking, Surrey (Knaphill), UK, 1874 More information and pictures
R. 'Lady Eleanor Cathcart' Rhododendron Hybrid R. maximum X R. arboreum ssp arboreum Hybridized By: Waterer John, Sons & Crisp. Bagshot, Surrey, UK, 1850 More information and pictures
R. 'Mademoiselle Marie van Houtte' Rhododendron Hybrid R. maximum X ? Hybridized By: Van Houtte, L. B. (Louis Benoit). Gentbrugge, Belgium, 1879 More information and pictures
R. 'Alarm' Rhododendron Hybrid R. maximum X ? Hybridized By: Waterer, H. (Knaphill). Woking, Surrey (Knaphill), UK, 1860 More information and pictures
R. 'July Possibility' Rhododendron Hybrid R. maximum X R. 'Ponticum Roseum' Hybridized By: Scott Arboretum, 1953	More information
R. 'Independence Day' Rhododendron Hybrid R. maximum X ? Hybridized By: Waterer, H. (Knaphill). Woking, Surrey (Knaphill), UK, 1915 More information and pictures
R. 'Summer Snow' Rhododendron Hybrid R. maximum X R. 'ungernii x auriculatum' Hybridized By: Leach, Dr. David G.. North Madison, Ohio, USA, 1969 More information and pictures
R. 'Late Beginning' Rhododendron Hybrid R. maximum X R. 'C.S. Sargent' Hybridized By: Scott Arboretum, 1953	More information
R. 'Angel Glow' Rhododendron Hybrid R. maximum X R. degronianum ssp yakushimanum 'Koichiro Wada' Hybridized By: Unknown	More information
R. 'Adele's Yellow' Rhododendron Hybrid R. maximum X R. wardii var wardii Hybridized By: Fetterhoff, W.M.. Gibsonia, Pennsylvania, USA, 1964	More information
R. 'maximum x haematodes' Rhododendron Hybrid R. maximum X R. haematodes ssp haematodes Hybridized By: Unknown	More information

Sibling Search

R. 'Hypermax'

(R. hyperythrum ) X (R. maximum )

Next Page

R. 'Cornelia Sanders'

Rhododendron Hybrid

R. hyperythrum X R. degronianum ssp yakushimanum

R. 'hyperythrum x The Honourable Jean Marie de Montague'

Rhododendron Hybrid

R. hyperythrum X R. 'The Honourable Jean Marie de Montague'

More information

R. 'Quaker Girl Group'

Rhododendron Cultivar group

R. hyperythrum X R. 'Avalanche Group'

More information

R. 'Ring's Early Splendor'

Rhododendron Hybrid

R. hyperythrum X R. catawbiense 'Catalgla'

R. 'Peppermint Twist'

Rhododendron Hybrid

R. hyperythrum X R. 'Princess Elizabeth'

R. 'Martha Player'

Rhododendron Hybrid

R. hyperythrum X R. 'Mrs Sam'

R. 'Boomer'

Rhododendron Hybrid

R. hyperythrum X R. 'Sham's Ruby'

More information

R. 'Pure Cream'

Rhododendron Hybrid

R. hyperythrum X R. 'Crest'

More information

R. 'Zyuni-hitoe'

Rhododendron Hybrid

R. degronianum ssp yakushimanum 'Koichiro Wada' X R. hyperythrum

More information

R. 'Elizabeth Ard'

Rhododendron Hybrid

R. 'English Roseum' X R. hyperythrum

More information

R. 'Michele Smith'

Rhododendron Hybrid

R. 'Scintillation' X R. hyperythrum

R. 'metternichii x hyperythrum'

Rhododendron Hybrid

R. degronianum ssp degronianum X R. hyperythrum

R. 'CeeCee'

Rhododendron Hybrid

R. 'Vulcan' X R. hyperythrum

More information

R. 'decorum x hyperythrum'

Rhododendron Hybrid

R. decorum ssp decorum X R. hyperythrum

More information

R. 'Woodcock'

Rhododendron Hybrid

R. 'Elizabeth Group' X R. hyperythrum

More information

R. 'Breezy'

Rhododendron Hybrid

R. 'Janet Blair' X R. hyperythrum

More information

R. 'Starglider'

Rhododendron Hybrid

R. 'Tols' X R. hyperythrum

More information

R. 'aureum x maximum'

Rhododendron Hybrid

R. aureum var aureum X R. maximum

More information

R. 'Whizette'

Rhododendron Hybrid

R. 'Princess Elizabeth' X R. maximum

More information

R. 'Ignescens'

Rhododendron Hybrid

R. arboreum ssp arboreum X R. maximum

More information

R. 'Russell Harmon'

Rhododendron Hybrid