Rhododendron Species


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R. degronianum ssp degronianum

SubgenusHymenanthes
SectionPontica
SubsectionPonticaClick to see all Pontica
Synonyms
R. degronianum f spontaneum
R. degronianum ssp pentamerum   (Matsumura
Jinzô Matsumura
(1856-1928)
Japan, Ibaraki-Ken
Botanical-short: Matsumura
)
R. degronianum var ankaii
R. degronianum var pentamerum   (Maxim.
Carl Johann Maximowicz
(1827-1891)
Russia, Tula
Botanical-short: Maxim.
)
R. japonicum   (C.K.Schneid.
Camillo Karl Schneider
(1876-1951)
Germany, Gröppendorf
Botanical-short: C.K.Schneid.
)
R. metternichii   (Siebold
Philipp Franz Balthazar von Siebold
(1796-1866)
Germany, Würzburg
Botanical-short: Siebold
& Zuccarini
Joseph Gerhard Zuccarini
(1797-1848)
Germany, München
Botanical-short: Zuccarini
)
R. nakaii
In cultivation since: ?

First described: 1869, (Carrière
Élie-Abel Carrière
(1818-1896)
France, Paris
Botanical-short: Carrière
)

Origin: N. Honshu, Japan around 1800 meter

Corolla: funnel-shaped
Leaves: oblong-elliptic

Habit: terrestrial
epiphytic = living on dead organic material (decaying trees f.i)
terrestrial = in soil (like in your garden)

Winter: evergreen
Bloomtime: unknown
Hardiness: H5
H0 = 0 °C (32 F)
H1 = -7 °C (20 F)
H2 = -12 °C (10 F)
H3 = -15 °C (5 F)
H4 = -18 °C (0 F)
H5 = -24 °C (-10 F)


Predominant color: ????

Height
Height
The figures listed here are the observed size in the natural environment.

The exact location (altitude, sunlight, soil, climate) can influence growth considerably
: 250 cm. (8ft.)

Registered
In 'Your Garden' you can administrate
your rhododendrons.

To try/see this go 'Home' (top-right).
on hirstum.info: 35
R. degronianum ssp degronianum per country:
(could be a clue for heat/cold-tolerance)

Finland : 16
United States : 5
Netherlands : 4
Japan : 4
Canada : 2
Lithuania : 1
France : 1
Denmark : 1
Norway : 1



Natural Hybrids
kurokimense =(aureum var aureum x degronianum ssp degronianum)

Clones / selections
'Aaron Heckler', 1977, Huber, R.R., ,
'Dalriada', unknown, ,
'Gerald Loder', 1974, Royal Botanical Gardens, Wakehurst, ,
'Himiko', 1990, Kawazu, N. Mrs., ,
'Ho Emma', unknown, ,
'Kyushu', unknown, ,
'Metternianum', unknown, ,
'Metternianus', unknown, ,
'Oki Island', unknown, ,
'Rae's Delight', 1950, Berry, Mrs A.C.U., ,
'Reihou', 1997, unknown, ,
'Superbum', unknown, ,
'Tahouzan', 1977, Japan, , no hybridiser registration
'Yayoi-nishiki', 1997, Japan, , no hybridiser registration


Send questions, information or pictures

Rhododendron degronianum ssp degronianum
Photo byCoen Zonneveld
Date09 April, 2009
LocationPrivate garden, Diepenveen, Netherlands
See high-resolution version
Rhododendron degronianum ssp degronianum
as R. metternichii
Photo byGarth Wedemire
Date11 April, 2010
LocationUniversity of Britsh Columbia, Vancouver, Canada
See high-resolution version
Rhododendron degronianum ssp degronianum
Photo of R. metternichii
Photo byGarth Wedemire
Date21 April, 2007
LocationRhododendron Species Botanical Garden, Federal Way, Washington, USA
See high-resolution version
Rhododendron degronianum ssp degronianum
Photo byDavid and Lorie Ideal Gardens
Date05 April, 2010
LocationIdeal Gardens, Johnstown, PA, USA
See high-resolution version
Rhododendron degronianum ssp degronianum
Photo of R. metternichii
Photo byGarth Wedemire
Date21 April, 2007
LocationRhododendron Species Botanical Garden, Federal Way, Washington, USA
See high-resolution version
Rhododendron degronianum ssp degronianum
80-003 RSBG as R. metternichii
Photo byGarth Wedemire
Date15 April, 2006
LocationRhododendron Species Botanical Garden, Federal Way, Washington, USA
See high-resolution version
Rhododendron degronianum ssp degronianum
Photo of R. japonicum var pentamerum f spontaneum
Photo byEverard Daniel
Date14 April, 2004
LocationLeonardslee/Loder Plants, Sussex, UK
See high-resolution version
Rhododendron degronianum ssp degronianum
Photo of R. japonicum var pentamerum f spontaneum
Photo byEverard Daniel
Date28 April, 2006
LocationLeonardslee/Loder Plants, Sussex, UK
See high-resolution version
Rhododendron degronianum ssp degronianum
Photo byCoen Zonneveld
Date
LocationPrivate garden, Diepenveen, Netherlands
Rhododendron degronianum ssp degronianum
Photo byCoen Zonneveld
Date
LocationDiepenveen, Netherlands
See high-resolution version
Rhododendron degronianum ssp degronianum
Photo byCoen Zonneveld
Date04 April, 2009
LocationPrivate garden, Diepenveen, Netherlands
Rhododendron degronianum ssp degronianum
as R. metternichii
Photo byGarth Wedemire
Date11 April, 2010
LocationUniversity of Britsh Columbia, Vancouver, Canada
See high-resolution version
Rhododendron degronianum ssp degronianum
Photo byHerman Van Ree
Date26 October, 2009
LocationArboretum Belmonte, Wageningen, Netherlands
Rhododendron degronianum ssp degronianum
Photo byHerman Van Ree
Date26 October, 2009
LocationArboretum Belmonte, Wageningen, Netherlands




degronianum ssp degronianum 'Gerald Loder'
Rhododendron degronianum ssp degronianum
Photo byHerman Van Ree
Date05 May, 2010
LocationRoyal Windsor Great Park, Valley, Berkshire, UK
See high-resolution version
degronianum ssp degronianum 'Gerald Loder'
Rhododendron degronianum ssp degronianum
Photo byHerman Van Ree
Date05 May, 2010
LocationRoyal Windsor Great Park, Valley, Berkshire, UK
See high-resolution version

Parentage according the IRRC of the Royal Horticultural Society
Hybrids / cultivars where R. degronianum ssp degronianum is directly involved:     show indirect inv.
'Axel Tigerstedt', 2002, Uosukainen, Marjatta, Dr. Mrs., Laukaa, FinlandR. brachycarpum ssp tigerstedtii x R. degronianum ssp degronianum
'degronianum ssp heptamerum x hirtipes', No hybridiser registered, , R. degronianum ssp degronianum x R. hirtipes
'Howard Kuhn' (photoClick to see more information


Howard Kuhn
), 1986, Kuhn, H., Muttontown, New York, USA
R. degronianum ssp degronianum x 'Siouxon x sanguineum ssp sanguineum var haemaleum'
'Lanzette', 1985, Hachmann, Hans, Barmstedt in Holstein, GermanyR. makinoi x R. degronianum ssp degronianum
'Martin Keister White', Hyatt, D.W. (Don), McLean, VI, USAR. degronianum ssp yakushimanum x R. degronianum ssp degronianum
'metternichii x hyperythrum' (photoClick to see more information


metternichii x hyperythrum
), unknown, ,
R. degronianum ssp degronianum x R. hyperythrum
'Sakura-kage', 1993, Maehara, H., , R. nikomontanum x R. degronianum ssp degronianum
'Terai-shiro', 2007, Terai, K, , R. degronianum ssp degronianum x R. degronianum ssp degronianum
'The Porcupine', 1986, Harvey, M.J., , R. degronianum ssp degronianum x R. makinoi
Hybrids where clones/selections of R. degronianum ssp degronianum are involved (alphabetical per clone)
'Aprilleuchten Group' (photoClick to see more information


Aprilleuchten Group
), 1952, H. Robenek & D.G.Hobbie, ,
'Soulkew Group' x R. degronianum ssp degronianum 'Metternianum'
'Sunday', 1949, Hobbie, Dietrich G., Westerstede/Linswege, GermanyR. degronianum ssp degronianum 'Metternianum' x R. griersonianum
'Superman' (photoClick to see more information


Superman
), 1968, Boswell, E.D. Mrs, ,
R. degronianum ssp degronianum 'Metternianum' x R.


Indirect involvement of R. degronianum ssp degronianum in cultivars: (cultivar = direct child/cultivar of degronianum ssp degronianum)
'Frühlingsglühen' (photoClick to see more information


Frühlingsglühen
), 1986, Hachmann, Hans, Barmstedt in Holstein, Germany
'Abendglut' x 'degronianum ssp heptamerum x hirtipes'
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Rhododendron Species   Hirsutum.info     Project started 03 June 2009