Rhododendron austrinum

Family:ERICACEAE
Species:Rhododendron austrinum (Small) Rehder
Common Name:Florida Azalea; Orange Azalea; Florida Flame Azalea
Habitat:**
Associated Ecological Communities:**
Growth Habit:Shrub
Duration:Perennial
Category:Vascular
USDA Symbol:RHAU
Plant Notes:Florida Azalea is a native deciduous shrub in the Azalea family (Ericaceae). It is native to the southern third of Alabama. Florida Azalea occurs in moist pine flatwoods, along streams and creeks, in moist Longleaf pine forests, and around bogs. It is a large shrub reaching 15 feet in height. The bark is smooth and brownish-gray. Young twigs are glandular pubescent. Leaves are alternate, petiolate, ovate to obovate in outline, with ciliate margins. The leaves are pubescent and have multicellular glandular hairs. Leaves turn yellow to brown before falling in the autumn. Flowers are produced in terminal inflorescences of 9-25 flowers on short pedicels. Flowers open before or with the unfolding of the new leaves. The flowers are weakly bilaterally symmetrical, funnelform, with 5 spreading lobes. The flowers are glandular pubescent, orange to yellow in color, and fragrant. The stamens and stigma are long exserted. The fruit is a capsule. Florida Azalea is listed as a S2/S3 species in Alabama (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.), and globally as a G3 species (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). Florida Azalea is a popular ornamental species and is available from many nurseries. It prefers a location receiving some sun with a moist, organic rich soil. Plants can also be grown from seed or by separating clones. Several selections have been developed by the nursery trade along with numerous hybrids with other species.--A. Diamond
Taxonomic Notes:**
Status:Native, S2S3 (State Rank), G3 (Global Rank)
References:**
Specimen: View specimen details in the Alabama Herbarium Consortium Specimen Database

** Not applicable or data not available.

Classification

FamilyERICACEAE - Heath family
Genus Rhododendron
Species Rhododendron austrinum (Small) Rehder - Florida Azalea; Orange Azalea; Florida Flame Azalea

Citation

Citation RHODODENDRON AUSTRINUM (Small) Rehder, in L. H. Bailey, Stand. Cycl. Hort. 6: 3571. 1917.
Basionym: Azalea austrina Small 1913.
Type: FLORIDA: Gadsden Co.: Chattahoochee, Apr & Oct, Curtiss 1718* (holotype: NY).

** Not applicable or data not available.

Synonyms

SynonymFull CitationBasionymType
Azalea austrina Azalea austrina Small, Fl. S.E. U.S., ed. 2. 1356, 1375. 1913. FLORIDA: Gadsden Co.: Chattahoochee, Apr & Oct, Curtiss 1718* (holotype: NY).

Specimens and Distribution

This species has been reported in the following counties by the herbaria listed. An overview of the individual specimens are provided in the table that follows. Click on the accession number to view details; click on column headers to sort; choose a county or herbaria to filter the specimen data.

Counties included on distribution map: Baldwin, Butler, Coffee, Conecuh, Covington, Crenshaw, Dale, Escambia, Geneva, Lee, Mobile, Monroe, Pickens

Counties represented by specimen data listed below:

Herbaria represented by specimen data listed below: AUA, JSU, TROY, UNA, USAM, UWAL

Range of years during which specimens were collected: -

Barcode / Accession No. County Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
Image
UWAL0002237 Butler 18 Apr 2010 Diamond, A.R.
21271
UWAL
Rhododendron austrinum (Small) Rehd.
TROY000004403 Conecuh 29 Mar 2003 Alvin R. Diamond
13829
TROY
Rhododendron austrinum (Small) Rehder
59216 Dale 19 AUG 1999 KRAL, ROBERT
88706
AUA
RHODODENDRON AUSTRINUM (SMALL) REHD.
52702 Covington 23 MAR 1990 DIAMOND, JR., ALVIN R.
6763
AUA
RHODODENDRON AUSTRINUM (SMALL) REHD.
TROY000004405 Escambia 29 Apr 1995 Cynthia L. Brittain
126
TROY
Rhododendron austrinum (Small) Rehder
UWAL0039934 Conecuh 25 Mar 2017 Diamond, Alvin R.
27792
UWAL
Rhododendron austrinum (Small) Rehder
43997 Conecuh 13 APR 1986 DIAMOND, JR., ALVIN R.
2320
AUA
RHODODENDRON AUSTRINUM (SMALL) REHD.
UWAL0007483 Butler 31 Mar 2007 Diamond, A.R.
17351
UWAL
Rhododendron austrinum (Small) Rehd.
69762 Monroe 31 MAR 2008 HANSEN, CURTIS J.
3263
AUA
RHODODENDRON AUSTRINUM (SMALL) REHD.
UWAL0019327 Pickens 29 May 1972 Kral, R.
46868
UWAL
Rhododendron austrinum (Small) Millais
TROY000004401 Butler 31 Mar 2007 Alvin R. Diamond
17351
TROY
Rhododendron austrinum (Small) Rehder
59225 Dale 8 SEP 2000 KRAL, ROBERT
88706
AUA
RHODODENDRON AUSTRINUM (SMALL) REHD.
UNA00060566 Conecuh 29 Mar 2003 Alvin R. Diamond
13829
UNA
Rhododendron austrinum (Small) Rehd.
49838 Conecuh 26 MAR 1989 DIAMOND, JR., ALVIN R.
5757
AUA
RHODODENDRON AUSTRINUM (SMALL) REHD.
26655 Mobile 22 APR 1971 WIDDER, E. J.
062
AUA
RHODODENDRON AUSTRINUM (SMALL) REHD.
UWAL0007484 Covington 15 Apr 2009 Hansen, C.J.
3638
UWAL
Rhododendron austrinum (Small) Rehd.
TROY000043897 Coffee 07 Apr 2016 Alvin R. Diamond
27283
TROY
Rhododendron austrinum (Small) Rehder
UWAL0033015 Coffee 07 Apr 2016 Diamond, Alvin R.
27283
UWAL
Rhododendron austrinum (Small) Rehder
TROY000004404 Crenshaw 12 Apr 1998 Alvin R. Diamond
11240
TROY
Rhododendron austrinum (Small) Rehder
TROY000042342 Covington 29 Mar 2015 Alvin R. Diamond
26071
TROY
Rhododendron austrinum (Small) Rehder
TROY000018377 Geneva 03 Apr 2008 Alvin R. Diamond
18871
TROY
Rhododendron austrinum (Small) Rehder
TROY000032135 Butler 18 Apr 2010 Alvin R. Diamond
21271
TROY
Rhododendron austrinum (Small) Rehder
69366 Covington 15 APR 2009 HANSEN, CURTIS J.
3638
AUA
RHODODENDRON AUSTRINUM (SMALL) REHD.
UWAL0007485 Geneva 03 Apr 2008 Diamond, A.R.
18871
UWAL
Rhododendron austrinum (Small) Rehd.
TROY000030075 Covington 15 Apr 2009 Curtis J. Hansen
3638
TROY
Rhododendron austrinum (Small) Rehder
JSU139169 Covington 02 Apr 2000 R. Kral
89371
JSU
Rhododendron austrinum (Small) Rehder
TROY000043762 Geneva 07 Apr 2016 Alvin R. Diamond
27291
TROY
Rhododendron austrinum (Small) Rehder
UWAL0032976 Geneva 07 Apr 2016 Diamond, Alvin R.
27291
UWAL
Rhododendron austrinum (Small) Rehder
UWAL0017734 Covington 29 Mar 2015 Diamond, Alvin R.
26071
UWAL
Rhododendron austrinum (Small) Rehder
UNA00055943 Geneva 4 Apr 1998 John R. MacDonald
10979
UNA
Rhododendron austrinum (Small) Rehd.
TROY000004402 Coffee 01 Apr 2000 Brian H. Martin
516
TROY
Rhododendron austrinum (Small) Rehder
46968 Covington 8 APR 1978 LAMB, TRIP
42
AUA
RHODODENDRON AUSTRINUM (SMALL) REHD.
UNA00066681 Butler 31 Mar 2007 Alvin R. Diamond
17351
UNA
Rhododendron austrinum (Small) Rehd.
50282 Covington 30 MAR 1990 DIAMOND, JR., ALVIN R.
6777
AUA
RHODODENDRON AUSTRINUM (SMALL) REHD.
10152 Lee 12 APR 1962 BASS, M. H.
AUA
RHODODENDRON AUSTRINUM (SMALL) REHD.
39996 Conecuh 6 APR 1985 DIAMOND, JR., ALVIN R.
381
AUA
RHODODENDRON AUSTRINUM (SMALL) REHD.
AUA000035901 Escambia 14 Jun 2011 HANSEN, CURTIS J.
5062
AUA
RHODODENDRON AUSTRINUM
USAM000016093 Baldwin 13 Nov 1977 Robert Green
s.n.
USAM
Rhododendron austrinum (Small) Rehder
UNA00068498 Covington 15 Apr 2009 C. J. Hansen
3638
UNA
Rhododendron austrinum (Small) Rehd.
TROY000044978 Conecuh 25 Mar 2017 Alvin R. Diamond
27792
TROY
Rhododendron austrinum (Small) Rehder
3720 Lee 10 APR 1951 BELL, CHARLES W.
AUA
RHODODENDRON AUSTRINUM (SMALL) REHD.
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