Rhododendron canescens

Distribution Map: Based on vouchered plant specimens from wild populations. Cultivated occurrences are not mapped. View county names by placing the cursor over the map.

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Family:	ERICACEAE
Species:	Rhododendron canescens (Michx.)Sweet
Common Name:	SWEET PINXTER AZALEA; MOUNTAIN AZALEA
Status:	Native, FACW (NWPL)
Specimen:	View details of USF Herbarium specimens

** Not applicable or data not available.

Classification

Division
Class
Sub Class
Order	ERICALES
Family	ERICACEAE
Genus	Rhododendron
Species	Rhododendron canescens (Michx.)Sweet - SWEET PINXTER AZALEA; MOUNTAIN AZALEA

Citation

Citation	RHODODENDRON CANESCENS (Michaux) Sweet, Hort. Brit., ed. 2. 343. 1830.
Basionym:	Azalea canescens Michaux 1803.
Type:	SOUTH CAROLINA:

** Not applicable or data not available.

Source

County	Herbaria	Literature Citation (If Applicable)
Alachua	USF
Baker	USF
Bay	USF
Bradford	USF
Calhoun	USF
Clay	USF
Columbia	USF
Duval	FLAS
Escambia	USF
Franklin	FSU
Gadsden	FLAS
Hamilton	USF
Holmes	FLAS
Jackson	FLAS
Jefferson	USF
Leon	USF
Liberty	USF
Madison	FSU
Marion	USF
Nassau	USF
Okaloosa	USF
Putnam	FSU
Santa Rosa	FLAS
St. Johns	PIHG
Suwannee	FLAS
Wakulla	FLAS
Walton	FLAS
Washington	USF

Synonyms

– Denotes synonyms that are applicable to the state. Show these synonyms only

Synonym	Full Citation	Basionym	Type
Azalea canescens	Azalea canescens Michaux, Fl. Bor.-Amer. 1: 150. 1803.		TYPE: SOUTH CAROLINA:
Azalea nudiflora var. canescens	Azalea nudiflora Linnaeus, var. canescens (Michaux) Rehder, in L. H. Bailey, Cycl. Amer. Hort. 1: 121. 1900, nom. illegit.	BASIONYM: Azalea nudiflora Linnaeus, var. rosea Sweet 1826; Azalea rosea Loiseleur-Deslongchamps 1812, nom. illegit.; Azalea canescens Michaux 1803.
Azalea nudiflora var. rosea	Azalea nudiflora Linnaeus, var. rosea Sweet, Hort. Brit. 265. 1826.	BASIONYM: Azalea rosea Loiseleur-Deslongchamps 1812, nom. illegit.; Azalea canescens Michaux 1803.
Azalea rosea	Azalea rosea Loiseleur-Deslongchamps, in Duhamel du Monceau, Traite Arbr. Arbust. 5: 224. 1812, nom. illegit.	BASIONYM: Azalea canescens Michaux 1803.
Rhododendron nudiflorum var. roseum	Rhododendron nudiflorum (Linnaeus) Torrey, var. roseum (Sweet) Sweet, Hort. Brit., ed. 2. 344. 1830.	BASIONYM: Azalea nudiflora Linnaeus, var. rosea Sweet 1826; Azalea rosea Loiseleur-Deslongchamps 1812, nom. illegit.; Azalea canescens Michaux 1803.
Rhododendron roseum	Rhododendron roseum (Sweet) Rehder, in E. H. Wilson & Rehder, Monogr. Azaleas 138. 1921, nom. illegit.	BASIONYM: Azalea nudiflora Linnaeus, var. rosea Sweet 1826; Azalea rosea Loiseleur-Deslongchamps 1812, nom. illegit.; Azalea canescens Michaux 1803.
Azalea bicolor	Azalea bicolor (Aiton) Pursh, Fl. Amer. Sept. 153. 1814.	BASIONYM: Azalea nudiflora Linnaeus, var. bicolor Aiton 1789.
Azalea nudiflora var. bicolor	Azalea nudiflora Linnaeus, var. bicolor Aiton, Hort. Kew. 1: 203. 1789.
Rhododendron bicolor	Rhododendron bicolor (Aiton) Sweet, Hort. Brit., ed. 2. 344. 1830.	BASIONYM: Azalea nudiflora Linnaeus, var. bicolor Aiton 1789.
Rhododendron nudiflorum forma bicolor	Rhododendron nudiflorum (Linnaeus) Torrey, forma bicolor (Aiton) Zabel, in Beissner et al., Handb. Laubholzben. 380. 1903.	BASIONYM: Azalea nudiflora Linnaeus, var. bicolor Aiton 1789.

Specimens

Country	State	County	Date	Specimen	Notes
USA	Florida	Clay Co.	27 Mar 1982	R. P. Sauleda 7078
USA	Florida	Jefferson Co.	06 Apr 1992	S. L. Orzell 19291
USA	Florida	Okaloosa Co.	10 Apr 1993	S. L. Orzell 21484
USA	Florida	Bay Co.	13 Mar 1991	S. L. Orzell 16111
USA	Florida	Escambia Co.	09 Apr 1993	S. L. Orzell 21441
USA	Florida	Hamilton Co.	21 Mar 1991	S. L. Orzell 16125
USA	Florida	Leon Co.	24 Mar 1973	J.M. Carlton s.n.	Sheet 1 of 2.
USA	Florida	Leon Co.	24 Mar 1973	J.M. Carlton s.n.	Sheet 2 of 2.
USA	Florida	Liberty Co.	17 Mar 1963	D. B. Ward 3410
USA	Florida	Nassau Co.	07 Jul 2000	C. Slaughter 12054
USA	Florida	Nassau Co.	30 Jun 2000	C. Slaughter 12006
USA	Florida	Calhoun Co.	15 Apr 2009	T. MacClendon 901
USA	Florida	Okaloosa Co.	14 Apr 2002	D. E. Atha 2601
USA	Florida	Walton Co.	06 Mar 1957	R. K. Godfrey 55389
USA	Florida	Columbia Co.	31 Mar 1962	D. B. Ward 3001
USA	Florida	Jefferson Co.	31 Mar 1958	R. K. Godfrey 56320
USA	Florida	Washington Co.	19 Feb 1956	R. K. Godfrey 54368
USA	Florida	Holmes Co.	04 Apr 1958	R. K. Godfrey 56399
USA	Florida	Calhoun Co.	03 Apr 1958	R. K. Godfrey 56349
USA	Florida	Leon Co.	25 Feb 1955	R. K. Godfrey 52907
USA	Florida	Alachua Co.	28 Mar 1972	M. Meagher 433
USA	Florida	Calhoun Co.	10 Mar 1955	R. K. Godfrey 52973
USA	Florida	Hamilton Co.	31 Mar 1962	D. B. Ward 2999a
USA	Florida	Marion Co.	31 Mar 1983	W. S. Judd 3228
USA	Florida	Bradford Co.	10 Mar 1992	J. L. Reveal 7139
USA	Florida	Calhoun Co.	21 Mar 2015	W. D. Longbottom 22389
USA	Alabama	Calhoun Co.	25 Apr 1969	R. Kral s.n.
USA	Alabama	Tuscaloosa Co.	19 Mar 1956	G. R. Cooley 4527
USA	Alabama	Covington Co.	07 Mar 1957	R. K. Godfrey 55402
USA	Alabama	Dale Co.	30 Mar 1980	L. J. Davenport 1735
USA	South Carolina	McCormick Co.	15 Apr 1993	S. R. Hill 24865
USA	Mississippi	Oktibbeha Co.	08 Apr 1956	G. R. Cooley 4697
USA	Mississippi	Pearl River Co.	27 Mar 1967	S. B. Jones 11390
USA	Mississippi	Webster Co.	21 Apr 1956	J. D. Ray, Jr. 7527
USA	Louisiana	Livingston Par.	19 Mar 1957	C. E. Allen 6410
USA	South Carolina	Berkeley Co.	26 Apr 1992	S. R. Hill 22997
USA	Georgia	Ben Hill Co.	15 Mar 2009	R. Chicone 772
USA	Louisiana	Lasalle Par.	19 Mar 1976	C. M. Allen 6930
USA	Louisiana	Winn Par.	16 Mar 1974	N. McInnis 15
USA	Louisiana	Vernon Par.	28 Apr 1955	G. R. Cooley 3931
USA	Louisiana	Winn Par.	15 Apr 1976	L. Chung s.n.
USA	Louisiana	Allen Par.	07 Apr 1977	C. E. Allen 7682
USA	Louisiana	Jackson Par.	24 Apr 1965	G. R. Cooley 3667
USA	Louisiana	Jackson Par.	24 Apr 1955	G. R. Cooley 3667
USA	Louisiana	Vernon Par.	27 Apr 1955	G. R. Cooley 3931
USA	Louisiana	Washington Par.	15 Mar 1974	V. I. Sullivan 1727
USA	Louisiana	Allen Par.	25 Mar 1979	1973
USA	Louisiana	Caldwell Par.	19 Mar 1974	R. D. Thomas 38165
USA	South Carolina	Bamberg Co.	06 Apr 1957	H. E. Ahles 22268
USA	Georgia	Meriwether Co.	13 Apr 1972	S. B. Jones 21758
USA	Mississippi	Forrest Co.	14 Apr 1956	J. D. Ray, Jr. 6048
USA	Mississippi	George Co.	18 Apr 1957	J. D. Ray, Jr. 8124
USA	Mississippi	Harrison Co.	15 Mar 1955	G. R. Cooley 3140
USA	Mississippi	Simpson Co.	12 Mar 1971	R. Wallus s.n.
USA	Georgia	Bulloch Co.	09 Apr 1996	S. R. Hill 27653
USA	Tennessee	Marion Co.	08 Apr 2000	S. R. Hill 32189
USA	South Carolina	Dorchester Co.	15 May 1988	S. R. Hill 19359
USA	Mississippi	Lauderdale Co.	18 Mar 1955	G. R. Cooley 3156
USA	Tennessee	Hamilton Co.	08 Apr 2000	S. R. Hill 32169
USA	Tennessee	Marion Co.	08 Apr 2000	S. R. Hill 32188
USA	Mississippi	Webster Co.	21 Apr 1956	J. D. Ray, Jr. 7527
USA	Georgia	Morgan Co.	20 Apr 1988	S. R. Hill 19231
USA	Mississippi	Lamar Co.	26 Jul 1956	J. D. Ray, Jr. 7220
USA	Mississippi	Monroe Co.	12 Jun 1956	J. D. Ray, Jr. 6265
USA	Mississippi	Lincoln Co.	21 Mar 1957	J. D. Ray, Jr. 7829e
USA	Alabama	Escambia Co.	19 Mar 1982	G. Wilhelm 10014
USA	Alabama	Baldwin Co.	20 May 1981	G. Wilhelm 8870
USA	Mississippi	Jackson Co.	12 Mar 1955	D. Demaree 36393
USA	Florida	Washington Co.	13 Mar 2018	S. Myers 1973
USA	Florida	Nassau Co.	06 Mar 2017	W. D. Longbottom 26330
USA	Florida	Baker Co.	29 Mar 1977	D. L. Martin 1007
USA	Florida	Columbia Co.	22 Mar 1977	D. L. Martin 984

Listed Status: Florida

Listed Status:	(Florida):Source - Plants in the Preservation of Native Flora of Florida Act. Chapter 5B-40, Florida Administrative Code. 1998, amended.
Endangered:	A species of plants native to the state that are in imminent danger of extinction within the state, the survival of which is unlikely if the causes of a decline in the number of plants continue, and includes all species determined to be endangered or threatened pursuant to the Federal Endangered Species Act of 1973, as amended.
Threatened:	Listed as Threatened Plants in the Preservation of Native Flora of Florida Act. Defined as species of plants native to the state that are in rapid decline in the number of plants within the state, but which have not so decreased in such number as to cause them to be endangered.

Listed Status: US

Listed Status: US	(U.S.) Source - List of Endangered and Threatened Wildlife and Plants under the provisions of the Endangered Species Act of 1973, as amended.
Endangered:	Any species which is in danger of extinction throughout all or a significant portion of its range.
Threatened:	Any species which is likely to become an endangered species within the foreseeable future throughout all or a significant portion of its range.

WAP: Wetland AssessmentProcedure

Wetland Assessment Procedure (WAP): Source - Southwest Florida Water Management District, Wetland Assessment Procedure Instruction Manual for Isolated Wetlands (March 2005).

AD:	Adaptive Species. Plant species designated as FAC or Upland by DEP, but commonly seen in the transition zone in limited numbers.
D:	Deep Species. Plant species commonly found in the deep zone, and designated either FAC or OBL by DEP.
OD:	Outer Deep Species. Plant species commonly found in the outer deep zone, and designated either FACW or OBL by DEP.
T:	Transition Species. Plant species commonly found in the transition zone, and designated either FACW or OBL by DEP.
U:	Upland Species. Plant species that are not expected to be seen in wetlands.

ANY - WAP critieria is not taken into consideration
Yes - Show results with WAP designations
No - Show results without WAP designations

FISC: Florida Invasive Species Council

FISC:

Source - Florida Invasive Species Council's 2017 List of Florida's Most Invasive Species

Category I - Species that are invading and disrupting native plant communities in Florida. This definition does not rely on the economic severity or geographic range of the problem, but on the documented ecological damage caused.

Category II - Species that have shown a potential to disrupt native plant communities. These species may become ranked as Category I, but have not yet demonstrated disruption of natural Florida communities.

DEP: Department of Environmental Protection

Wetland Status, Department of Environmental Regulation (DEP): Source - Delineation of the Landward Extent of Wetlands and Surface Waters, Chapter 62-340, Florida Administrative Code. 1994.

OBL:	Obligate wetland. Occurs almost always under natural conditions in wetlands.
FACW:	Facultative Wetland. Usually occurs in wetlands, but occasionally found in non-wetlands
FAC:	Facultative. equally likely to occur in wetlands or non-wetlands.

NWPL: National Wetland Plant List

National Wetland Plant List (NWPL): Source - Lichvar, R.W., M. Butterwick, N.C. Melvin, and W.N. Kirchner. 2014. The National Wetland Plant List: 2014 Update of Wetland Ratings. Phytoneuron 2014-41: 1-42.

OBL:	Obligate Wetland. Occurs almost always (estimated probability 99%) under natural conditions in wetlands.
FACW:	Facultative Wetland. Usually occurs in wetlands (estimated probability 67%-99%), but occasionally found in non-wetlands.
FAC:	Facultative. Equally likely to occur in wetlands or non-wetlands (estimated probability 34%-66%).
FACU:	Facultative Upland. Usually occurs in non-wetlands (estimated probability 67%-99%), but occasionally found in wetlands (estimated probability 1%-33%).
UPL:	Obligate Upland. Occurs in wetlands in another region, but occurs almost always (estimated probability 99%) under natural conditions in non-wetlands in the regions specified.

Persisting

Identifying species that appear as waifs or only periodically appear in the flora for a few seasons.

Any - Persisting critieria is not taken into consideration
Yes - Show results with a Persisting value of Y
No - Show results without Persisting value of N

Duration

Annual:	Plants that perform their entire lifecycle within a single growing season. All roots, stems, and leaves die at the end of the growing season. Over wintering seeds allow the next generation to appear.
Biennial:	A plant that is typically vegetative its first year and blooms the following season. Once it has bloomed and set seed, the plant dies. Garlic mustard is an example of a biennial.
Perennial:	These plants live for three or more seasons. Many perennials may not be mature enough to bloom during its first year. Perennial wildflowers re-grow each season from overwinter root material.

Category

Vascular:	Any of various plants that have the vascular tissues xylem and phloem. The vascular plants include all seed-bearing plants (the gymnosperms and angiosperms) and the pteridophytes (including the ferns, lycophytes, and horsetails). Also called tracheophyte.
Bryophyte:	A large group of seedless green plants including the mosses, liverworts, and hornworts. Bryophytes lack the specialized tissues xylem and phloem that circulate water and dissolved nutrients in the vascular plants. Bryophytes generally live on land but are mostly found in moist environments, for they have free-swimming sperm that require water for transport. In contrast to the vascular plants, the gametophyte (haploid) generation of bryophytes constitutes the larger plant form, while the small sporophyte (diploid) generation grows on or within the gametophyte and depends upon it for nutrition.
Lichen:	The mutualistic symbiotic association of a fungus with an alga or a cyanobacterium, or both. The fungal component of a lichen absorbs water and nutrients from the surroundings and provides a suitable environment for the alga or cyanobacterium. These live protected among the dense fungal hyphae and produce carbohydrates for the fungus by photosynthesis. Owing to this partnership, lichens can thrive in harsh environments such as mountaintops and polar regions. The more familiar lichens grow slowly as crusty patches, but lichens are found in a variety of forms, such as the tall, plantlike reindeer moss. The association between the different organisms in a lichen is so close that lichens are routinely referred to as a single organism, and scientists classify lichens using the name of the fungal component.

(Definitions from: American Heritage Science Dictionary)

Growth Habit

Intro paragraph to be provided by New York.

Vine:	DESCRIPTION TO BE PROVIDED BY NEW YORK.
Shrub:	DESCRIPTION TO BE PROVIDED BY NEW YORK.
Tree:	DESCRIPTION TO BE PROVIDED BY NEW YORK.
Et cetera:	DESCRIPTION TO BE PROVIDED BY NEW YORK.

State Rank

This numeric rank provides the relative rarity for each species based on a scale from 1 (very rare) to 5 (common). These ranks carry no legal status.

S1 - Typically 5 or fewer occurrences, very few remaining individuals, acres, or miles of stream, or some factor of its biology making it especially vulnerable in the state.
S2 - Typically 6 to 20 occurrences, few remaining individuals, acres, or miles of stream, or factors demonstrably making it very vulnerable in the state.
S3 - Typically 21 to 100 occurrences, limited acreage, or miles of stream in the state.
S4 - Apparently secure in the state.
S5 - Demonstrably secure in the state.
SE - State exotic or non-native.
SH - Historically known from the state, but not seen in the past 15 years.
SNA - Species for which a rank is not applicable. This is mainly those species which are now excluded from flora for various reasons.
SNR - Not yet ranked.
SX - Apparently extirpated from the state.

Global Rank

Each species' global rank is determined by NatureServe. These ranks carry no legal weight. The global rank reflects the species worldwide rarity.

G1 - Critically imperiled globally because of extreme rarity (5 or fewer occurrences), or very few remaining acres, or miles of stream) or especially vulnerable to extinction because of some factor of its biology.
G2 - Imperiled globally because of rarity (6 - 20 occurrences, or few remaining acres, or miles of stream) or very vulnerable to extinction throughout its range because of other factors.
G3 - Imperiled globally because of rarity (6 - 20 occurrences, or few remaining acres, or miles of stream) or very vulnerable to extinction throughout its range because of other factors.
G4 - Imperiled globally because of rarity (6 - 20 occurrences, or few remaining acres, or miles of stream) or very vulnerable to extinction throughout its range because of other factors.
G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
GH - Historically known, with the expectation that it might be rediscovered.
GNA - Species for which a rank is not applicable. NatureServe does not typically rank hybrid species.
GNR - Not yet ranked.
GX - Species believed to be extinct.

Filter by County - Counties to Include - ANY versus ALL

Any - An Any search will combine the list of counties to include with a Boolean Or. Plant species returned will be found within at least one of the selected counties.
All - An All search will combine the list of counties to include with a Boolean And. Plant species returned will be found within each of the selected counties.

Filter by County - Counties to Exclude - ANY versus ALL

Any - An Any search will combine the list of counties to exclude with a Boolean Or. Plant species returned will not be found within at least one of the selected counties.
All - An All search will combine the list of counties to exclude with a Boolean And. Plant species returned will not be found within any of the selected counties.

Associated Ecological Communities

View a List of All Ecological Communities

For more information, contact: Richard Wunderlin or Bruce Hansen, Alan Franck, or Karla Alvarado

Web Development: USF Water Institute

A member of the University of South Florida family of PlantAtlas.org websites

Citation Information:

Wunderlin, R. P., B. F. Hansen, A. R. Franck, and F. B. Essig. 2024. Atlas of Florida Plants (http://florida.plantatlas.usf.edu/). [S. M. Landry and K. N. Campbell (application development), USF Water Institute.] Institute for Systematic Botany, University of South Florida, Tampa.

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Definition: Vouchered Specimen

A voucher specimen is a pressed and thoroughly dried plant sample deposited in a herbarium, and is intended to be a permanent record supporting research purposes. A voucher may be a record of a plant's occurrence in a particular area, or a specific example of a plant used in a scientific investigation.

Proper vouchers display all the necessary attributes for complete identification of the plant, and are to be accompanied by accurate locality, habitat, collection time, and collector data.

Only plant populations vouchered by specimens deposited in Index Herbariorum http://sweetgum.nybg.org/science/ih/ recognized herbaria are represented on this map.