Rhododendron Species


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R. calendulaceum

SubgenusPentanthera
SectionPentanthera
SubsectionPentantheraClick to see all Pentanthera
Synonyms
Azalea aurantiaca   (Dietr
Albert Gottfried Dietrich
(1795-1856)
Germany, Danzig (now Poland)
Botanical-short: Dietr
)
Azalea calendulacea
Azalea calendulacea var corcea
R. calendulaceum f aurantiacum
R. calendulaceum f aurantiacum
R. calendulaceum f croceum
R. calendulaceum var aurantiacum
R. calendulaceum var aurantiacum var calendulaceum
Azalea coccinea   (Lodd
Joachim Conrad Loddiges
(1736-1826)
Germany, Hildersheim
Botanical-short: Lodd
)
Azalea corcea   (Hoffmanns
Johan Centurius von Hoffmannsegg
(1766-1849)
Germany, Dresded
Botanical-short: Hoffmanns
)
Azalea flammea   (Bartram
John Bartram
(1699-1777)
USA, Darby, Pennsylvania
Botanical-short: Bartram
)
Azalea fulva
Azalea pontica calendulacea
Azalea speciosa var autantia
Azalea speciosa var coccinea
In cultivation since: 1750

First described: 1824, (Michx.
François André Michaux
(1770-1855)
France, Versailles
Botanical-short: Michx.
& Torr.
John Torrey
(1796-1873)
USA, New York
Botanical-short: Torr.
)

Origin: S. New York through Carolinas to N. Georgia, 180-1500 meter

Corolla: funnel-shaped
Leaves: ovate-elliptic

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

Winter: deciduous
Bloomtime: late midseason
Hardiness:
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: orange

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
: 900 cm. (30ft.)

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

To try/see this go 'Home' (top-right).
on hirstum.info: 64
R. calendulaceum per country:
(could be a clue for heat/cold-tolerance)

Finland : 45
Netherlands : 8
United States : 4
Denmark : 3
Canada : 3
France : 1

Common names
Fiery Azalea
Flame Azalea
Flame Flower


Clones / selections
'Bright and Lively', 1985, Carlson's Gardens, (Bob & Janice Carlson), South Salem, New York, USA
'Cabot Flame', 1992, Bill, H., Enosburg, Vermont, USA
'Coccineum Speciosum', 1836, Sénéclause, L., ,
'Colossus', 1953, Leach, Dr. David G., North Madison, Ohio, USA
'Honey Do', 1985, Carlson's Gardens, (Bob & Janice Carlson), South Salem, New York, USA
'Igneum', 1851, Waterer (Bagshot), Surrey, England
'Jazz', 1987, No hybridiser registered, ,
'Little's Blushing Giant', 1996, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Enchanting Dawn', 1994, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Enchanting Eve', 1993, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Fancy Twist', 1999, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Fiery Star', 1996, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Fire Glow', 2000, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Giant Salmon', 1994, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Gold Giant', 1997, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Misty Blush', 1994, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Mountain Giant', 1990, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Mountain Gold', 1994, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Mountain Melody', 1994, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Mountain Passion', 1994, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Mountain Sunlight', 1993, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Orange Crush', 1998, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Orange Ridge', 1998, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Pink Glow', 1994, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Pink Gold', 1994, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Salmon Glow', 1993, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Sun Mist', 1994, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Little's Sunburst', 1994, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USA
'Novum', 1870, Van Houtte, L. B. (Louis Benoit), Gentbrugge, Belgium
'Oconee Arrow', 1987, Towe, L.C., ,
'Smoky Mountaineer', unknown, ,


Send questions, information or pictures

Rhododendron calendulaceum
Photo byRinus Manders
Date13 June, 2014
LocationArboretum Belmonte, Wageningen, Netherlands
See high-resolution version
Rhododendron calendulaceum
Photo bySusan Lightburn
Date12 June, 2100
Locationprivate garden Vancouver Island Nanoose Bay BC Canada
See high-resolution version
Rhododendron calendulaceum
Photo byHank Helm
Date24 May, 2006
LocationHank Helm Garden, Bainbridge Island, WA, USA
See high-resolution version
Rhododendron calendulaceum
Photo byGarth Wedemire
Date19 May, 2007
LocationRhododendron Species Botanical Garden, Federal Way, Washington, USA
See high-resolution version
Rhododendron calendulaceum
Photo bySusan Lightburn
Date16 June, 2011
Locationprivate garden Vancouver Island Nanoose Bay BC Canada
See high-resolution version
Rhododendron calendulaceum
Photo byHerman Van Ree
Date10 June, 2010
Locationown garden Nunspeet, Netherlands
See high-resolution version
Rhododendron calendulaceum
Photo bySusan Lightburn
Date12 June, 2011
Locationprivate garden Vancouver Island Nanoose Bay BC Canada
See high-resolution version
Rhododendron calendulaceum
Photo byTijs Huisman
Date02 May, 2003
Location
See high-resolution version
Rhododendron calendulaceum
Photo bySusan Lightburn
Date12 June, 2011
Locationprivate garden Vancouver Island Nanoose Bay BC Canada
See high-resolution version
Rhododendron calendulaceum
Photo bySusan Lightburn
Date12 June, 2011
Locationprivate garden Vancouver Island Nanoose Bay BC Canada
See high-resolution version
Rhododendron calendulaceum
Photo byTijs Huisman
Date18 June, 2006
LocationBig Yellow Mountain, North Carolina, USA
See high-resolution version
Rhododendron calendulaceum
Photo bySusan Lightburn
Date12 June, 2011
Locationprivate garden Vancouver Island Nanoose Bay BC Canada
See high-resolution version
Rhododendron calendulaceum
Photo byTijs Huisman
Date18 June, 2006
LocationBig Yellow Mountain, North Carolina, USA
See high-resolution version
Rhododendron calendulaceum
Photo byTijs Huisman
Date21 June, 2006
LocationWayah Bald, North Carolina, USA
See high-resolution version
Rhododendron calendulaceum
Photo byTheo Damen
Date06 May, 2004
LocationArboretum Belmonte, Wageningen, Netherlands
See high-resolution version
Rhododendron calendulaceum
Photo byCoen Zonneveld
Date
LocationDiepenveen, Netherlands
Rhododendron calendulaceum
Photo byCoen Zonneveld
Date16 May, 2004
Locationprivate garden Groede, Netherlands
Rhododendron calendulaceum
Photo byHerman Van Ree
Date13 April, 2010
Locationown garden Nunspeet, Netherlands
Rhododendron calendulaceum
Photo byHerman Van Ree
Date17 May, 2010
Locationown garden Nunspeet, Netherlands
See high-resolution version
Rhododendron calendulaceum
almost flowering
Photo byHerman Van Ree
Date01 June, 2010
Locationown garden Nunspeet, Netherlands
See high-resolution version
Rhododendron calendulaceum
Photo byHerman Van Ree
Date09 September, 2009
LocationNunspeet, Netherlands



calendulaceum 'Coccineum Speciosum'
Rhododendron calendulaceum
Photo byHan Boerrigter
Date05 May, 2011
Locationprivate garden province Groningen, Netherlands
See high-resolution version
calendulaceum 'Coccineum Speciosum'
Rhododendron calendulaceum
Photo byRinus Manders
Date21 May, 2014
LocationNess Botanic Garden, Neston, Cheshire, UK
See high-resolution version
calendulaceum 'Coccineum Speciosum'
Rhododendron calendulaceum
Photo byRinus Manders
Date21 May, 2014
LocationNess Botanic Garden, Neston, Cheshire, UK
See high-resolution version
calendulaceum 'Coccineum Speciosum'
Rhododendron calendulaceum
Photo byHan Boerrigter
Date10 May, 2011
Locationprivate garden province Groningen, Netherlands
calendulaceum 'Coccineum Speciosum'
Rhododendron calendulaceum
Photo byHan Boerrigter
Date06 May, 2011
Locationprivate garden province Groningen, Netherlands

Parentage according the IRRC of the Royal Horticultural Society
Hybrids / cultivars where R. calendulaceum is directly involved:     show indirect inv.
'Calendarb', 1955, Biltmore Gardens, Asheville. North Carolina, USAR. arborescens x R. calendulaceum
'Cape Fear Gold' (photoClick to see more information


Cape Fear Gold
), 1978, Player, L. M., Fayetteville, North Carolina, USA
R. austrinum x R. calendulaceum
'Corley's Cardinal', 1987, Smitherman, R.O., Auburn, Alabama, USAR. calendulaceum x R. calendulaceum
'Galle's Choice', 1962, Galle, F.C., , R. calendulaceum x R. alabamense
'Gamecock', 1995, Towe, L.C. & Anastos, N., , R. calendulaceum x R. periclymenoides
'Golden Eagle' (photoClick to see more information


Golden Eagle
), 1949, Waterer, H. (Knaphill), Woking, Surrey (Knaphill), UK
R. calendulaceum x ?
'Jean C', 1977, Hollowell, E.A., , R. calendulaceum x 'Klondyke'
'Kathy's Flame', 1985, Sommerville, E.A., , R. calendulaceum x R. flammeum
'Little's Sunfrost Torch', 1994, Little, P.L., Piping Tree Gardens, Beaverdam, Virgina, USAR. calendulaceum x R. periclymenoides
'luteum x calendulaceum', unknown, , R. luteum x R. calendulaceum
'Mabel H', 1978, Hollowell, E.A., , R. calendulaceum x 'Klondyke'
'Macranthum', 1840, Verschaffelt, L, Royghem (near Ghent), BelgiumR. calendulaceum x ?
'Mandarin Lights' (photoClick to see more information


Mandarin Lights
), 1967, Minnesota Landscape Arboretum, ,
R. calendulaceum x 'Orangeade'
'Orange Carpet', 1960, Sommerville, E.A., , R. calendulaceum x R. flammeum
'Random Red', 1985, Towe, L.C. & Anastos, N., , R. calendulaceum x R. periclymenoides
'Salmon Spectacle', 1985, Holmsomback, O., , R. arborescens x R. calendulaceum
'Superbum', 1836, Loddiges, C. & Sons, Hackney, London, EnglandR. calendulaceum x ?
'Sweet Pink', 1986, Transplant Nursery, , R. atlanticum x R. calendulaceum
Hybrids where clones/selections of R. calendulaceum are involved (alphabetical per clone)
'Bakkarat' (photoClick to see more information


Bakkarat
), 1959, Hachmann, Hans, Barmstedt in Holstein, Germany
R. calendulaceum 'Coccineum Speciosum' x 'Gibraltar'


Indirect involvement of R. calendulaceum in cultivars: (cultivar = direct child/cultivar of calendulaceum)
'Goldie', 1965, unknown, , 'luteum x calendulaceum' x 'J. Jennings'
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Rhododendron Species   Hirsutum.info     Project started 03 June 2009