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Rhododendron calendulaceum (Michx.) Torr.
FLAME AZALEA
Life   Plantae   Dicotyledoneae   Ericaceae   Rhododendron

Rhododendron calendulaceum
© Copyright Bobby Hattaway 2011 · 5
Rhododendron calendulaceum

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Rhododendron calendulaceum
© Copyright Bobby Hattaway 2011 · 5
Rhododendron calendulaceum
Rhododendron calendulaceum
© Copyright Bobby Hattaway 2011 · 5
Rhododendron calendulaceum

Rhododendron calendulaceum
© Copyright Bobby Hattaway 2011 · 5
Rhododendron calendulaceum
Rhododendron calendulaceum
© Copyright Bobby Hattaway 2011 · 5
Rhododendron calendulaceum

Rhododendron calendulaceum
© Copyright Bobby Hattaway 2011 · 5
Rhododendron calendulaceum
Rhododendron calendulaceum
© Copyright Bobby Hattaway 2011 · 5
Rhododendron calendulaceum

Rhododendron calendulaceum
© Copyright Bobby Hattaway 2011 · 5
Rhododendron calendulaceum
Rhododendron calendulaceum
© Copyright Bobby Hattaway 2011 · 5
Rhododendron calendulaceum

Rhododendron calendulaceum
© Copyright Bobby Hattaway 2011 · 5
Rhododendron calendulaceum
Rhododendron calendulaceum
© Copyright Bobby Hattaway 2011 · 5
Rhododendron calendulaceum

Rhododendron calendulaceum
© Copyright Bobby Hattaway 2011 · 5
Rhododendron calendulaceum
Rhododendron calendulaceum
© Copyright Bobby Hattaway 2011 · 5
Rhododendron calendulaceum

Rhododendron calendulaceum
© Copyright Bobby Hattaway 2011 · 5
Rhododendron calendulaceum
Rhododendron calendulaceum
© Copyright Bobby Hattaway 2011 · 5
Rhododendron calendulaceum

Associates · map
FamilyScientific name @ source (records)
Andrenidae  Andrena cornelli @ CUIC_ENT (4)
Botryosphaeriaceae  Phyllosticta @ BPI (1)
Exobasidiaceae  Exobasidium azaleae @ BPI (1)

Exobasidium vaccinii @ BPI (3)
_  Pycnis @ BPI (2)

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&pull 20q v5.145 20180528: Error 500 Can't connect to www.cnr.vt.edu:80 http://www.cnr.vt.edu/dendro/dendrology/syllabus/rcalendulaceum.htm

Following modified from Plants Database, United States Department of Agriculture
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http://plants.usda.gov/java/profile?symbol=RHCA4 ---> https://plants.usda.gov/java/profile?symbol=RHCA4
https://plants.usda.gov/java/profile?symbol=RHCA4 ---> http://plants.usda.gov/core/profile?symbol=RHCA4
http://plants.usda.gov/core/profile?symbol=RHCA4 ---> https://plants.usda.gov/core/profile?symbol=RHCA4
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Rhododendron calendulaceum (Michx.) Torr.
flame azalea

Image of Rhododendron calendulaceum

General Information
Symbol: RHCA4
Group: Dicot
Family: Ericaceae
Duration: Perennial
Growth Habit : Shrub
Native Status : L48   N
Data Source and Documentation
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Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   

Images

click on a thumbnail to view an image, or see all the Rhododendron thumbnails at the Plants Gallery

©Thomas G. Barnes. Usage Requirements .

©Thomas G. Barnes. Usage Requirements .

©Richard A. Howard. Provided by Smithsonian Institution, Richard A. Howard Photograph Collection . United States, MA, Weston. Usage Requirements .

©Richard A. Howard. Provided by Smithsonian Institution, Richard A. Howard Photograph Collection . United States, MA, Boston, Arnold Arboretum. Usage Requirements .

Daniel O. Todd. Provided by National Agricultural Library . Originally from USDA Forest Service . United States, NC, Nantahala National Forest. 1961. Usage Requirements .

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 2: 678. Provided by Kentucky Native Plant Society . Scanned by Omnitek Inc . Usage Requirements .

slideshow

Synonyms

Symbol Scientific Name
AZCA2 Azalea calendulacea Michx.
AZLU Azalea lutea auct. non L.

Classification

Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Magnoliopsida – Dicotyledons
Subclass Dilleniidae
Order Ericales
Family Ericaceae – Heath family
Genus Rhododendron L. – rhododendron
Species Rhododendron calendulaceum (Michx.) Torr. – flame azalea

Subordinate Taxa

This plant has no children

Legal Status

Threatened and Endangered Information:
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete protected plant list for that location.
Ohio flame azalea Endangered
Pennsylvania flame azalea Extirpated

Wetland Status

Interpreting Wetland Status

Related Links

More Accounts and Images
ARS Germplasm Resources Information Network (RHCA4)
CalPhotos (RHCA4)
Integrated Taxonomic Information System (AZCA2)
Integrated Taxonomic Information System (AZLU)
Integrated Taxonomic Information System (RHCA4)
Lady Bird Johnson Wildflower Center Native Plant Information Network (RHCA4)
Native American Ethnobotany (University of Michigan - Dearborn) (RHCA4)
Native Plants Network (RHCA4)
USDA Forest Service Fire Effects Information System (RHCA4)
University of Tennessee Herbarium (Distribution) (RHCA4)

Wildlife

Food

Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Cover

Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover


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Following modified from Flora of North America
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FNA Vol. 8 Page 458, 465 , 466, 469, 470, 471 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 8 | Ericaceae | Rhododendron

12. Rhododendron calendulaceum (Michaux) Torrey, Fl. N. Middle United States. 425. 1824.

Flame azalea

Azalea calendulacea Michaux, Fl. Bor.-Amer. 1: 151. 1803

Shrubs or trees , to 4(-10) m, usually not rhizomatous. Stems: bark smooth to vertically furrowed, shredding; twigs sparsely to conspicuously multicellular eglandular-hairy (hairs unbranched), otherwise sparsely to moderately unicellular-hairy. Leaves deciduous; petiole multicellular eglandular-hairy and unicellular-hairy; blade ovate to obovate, 4.5-9.1 × 1.3-3.3 cm, thin, membranous to chartaceous, margins entire, plane, ciliate, eglandular-hairy, apex acute to obtuse, often mucronate, abaxial surface glabrous or densely eglandular-hairy, often also very sparsely to moderately unicellular-hairy, adaxial surface glabrous or sparsely scattered eglandular-hairy, often also sparsely unicellular-hairy. Floral bud scales usually glabrous abaxially, margins glandular. Inflorescences 5-9-flowered; bracts similar to bud scales. Pedicels 7-14 mm, stipitate-glandular-hairy and/or eglandular-hairy, otherwise sparsely to densely unicellular-hairy. Flowers opening before or as leaves expand, erect to horizontal, acrid-scented; calyx lobes 1-3 mm, scattered usually stipitate-glandular-hairy and unicellular-hairy, margins long stipitate-glandular-hairy and/or eglandular-hairy; corolla orange to red-orange, with contrasting, darker-colored, orange to yellow blotch on upper lobe, funnelform, 30-54 mm, densely multicellular stipitate-glandular-hairy, otherwise sparsely to densely unicellular-hairy on outer surface, petals connate, lobes 14-30 mm, (spreading nearly as broadly as tube is long), tube abruptly expanding into lobes, 16-28 mm (longer than lobes); stamens 5, much exserted, ± unequal, 52-72 mm. Capsules borne on erect pedicels, 15-29 × 5-9 mm, sparsely to moderately long stipitate-glandular-hairy and/or eglandular-hairy, and sparsely unicellular-hairy. Seeds without distinct tails, flattened portion of testa well developed at each end; testa expanded, dorsiventrally flattened, ± loose. 2 n = 52.

Flowering spring-summer. Mixed deciduous forests; 200-1000 m; Ga., Ky., Md., N.C., Ohio, Pa., S.C., Tenn., Va., W.Va.

Rhododendron calendulaceum , frequently con-fused with the diploid R. cumberlandense , is an allotetraploid, and may have been derived from a hybrid between an ancestor of R. cumberlandens e and one of R. prinophyllum (K. A. Kron 1993). It is distinguished from R. cumberlandense by its flowers opening before or with (versus after) the expansion of the leaves, glandular or eglandular (versus usually eglandular) pedicels, glandular or eglandular (versus usually eglandular) sepal margins ( R. cumberlandense never with both pedicels and sepal margins glandular), and nonglaucous (versus often glaucous) abaxial leaf surface. Rhododendron calendulaceum is one of the showiest shrubs of the southern Appalachians; it is known to hybridize with R. prinophyllum and R. canescens .

Rhododendron calendulaceum and the remaining species (through 25. R. eastmanii ) are the North American representatives of sect. Pentanthera G. Don, a group characterized by corollas that are typically unicellular-hairy on the outside and with a narrow tube, flowers with five, declinate, and usually much-exserted stamens, and seeds with ± loose testae (K. A. Kron 1993; Kron and M. Creel 1999). All species are used as ornamentals because of their colorful flowers (F. C. Galle 1985).

Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Rhododendron+calendulaceum&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Rhododendron+calendulaceum&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

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Number of matches : 31
Query: SELECT * FROM img WHERE ready=1 and taxon like "Rhododendron calendulaceum%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Rhododendron calendulaceum
Rhododendron calendulaceum
Flaming Azalea
ID: 0000 0000 0505 1665 [detail]
© 2005 George Rembert

Rhododendron calendulaceum
Rhododendron calendulaceum
Flaming Azalea
ID: 0000 0000 0505 1666 [detail]
© 2005 George Rembert

Rhododendron calendulaceum
Rhododendron calendulaceum
Flaming Azalea
ID: 0000 0000 0505 1667 [detail]
© 2005 George Rembert

Rhododendron calendulaceum
Rhododendron calendulaceum
Flaming Azalea
ID: 0000 0000 0505 1668 [detail]
© 2005 George Rembert

Rhododendron calendulaceum
Rhododendron calendulaceum
Flaming Azalea
ID: 0000 0000 0505 1669 [detail]
© 2005 George Rembert

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3653 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3654 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3655 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3656 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3657 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3658 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3659 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3660 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3661 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3662 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3663 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3664 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3665 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3666 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3667 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3668 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3669 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3670 [detail]
© 2016 Keir Morse

Rhododendron calendulaceum
Rhododendron calendulaceum
Flame Azalea
ID: 0000 1111 1234 3671 [detail]
© 2016 Keir Morse

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .   


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