Rhododendron viscosum

Family:ERICACEAE
Species:Rhododendron viscosum (L.)Torr.
Common Name:SWAMP AZALEA
Plant Notes:Rehder (1921) excluded R. viscosum from Florida and instead recognized R. serrulatum as the species in Florida. A comparison and discussion of the differences can be found here, pages 153-166: https://www.biodiversitylibrary.org/item/67651#page/171/mode/1up.
Status:Native, FACW (DEP), OBL (NWPL)
Specimen: View details of USF Herbarium specimens

** Not applicable or data not available.

Classification

Division
Class
Sub Class
Order ERICALES
FamilyERICACEAE
Genus Rhododendron
Species Rhododendron viscosum (L.)Torr. - SWAMP AZALEA

Citation

Citation RHODODENDRON VISCOSUM (Linnaeus) Torrey, Fl. N. Middle United States 424. 1824.
Basionym: Azalea viscosa Linnaeus 1753.
Type: VIRGINIA: Without data, Kalm s.n. (lectotype: LINN 215.4). Lectotypified by Kron, Edinburgh J. Bot. 50: 329. 1993.

** Not applicable or data not available.

Source

CountyHerbariaLiterature Citation (If Applicable)
Alachua FLAS  
Baker USF  
Bay USF  
Calhoun USF  
Clay USF  
DeSoto USF  
Duval USF  
Escambia FLAS  
Franklin USF  
Gadsden FLAS  
Gulf FSU  
Hamilton USF  
Hardee USF  
Hernando USF  
Highlands USF  
Hillsborough USF  
Jackson FLAS  
Jefferson FLAS  
Lake USF  
Leon USF  
Liberty USF  
Madison FSU  
Manatee USF  
Marion USF  
Nassau FLAS  
Okaloosa USF  
Orange USF  
Osceola USF  
Pasco USF  
Polk USF  
Putnam USF  
Santa Rosa USF  
Seminole USF  
St. Johns FSU  
Suwannee FLAS  
Taylor FLAS  
Union FLAS  
Wakulla USF  
Walton USF  
Washington FSU  

Synonyms

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

SynonymFull CitationBasionymType
Anthodendron viscosum Anthodendron viscosum (Linnaeus) Reichenbach, in Moessler, Handb. Gewaechsk., ed. 2. 1: 309. 1827.BASIONYM: Azalea viscosa Linnaeus 1753. 
Azalea serrulata Azalea serrulata Small, Fl. S.E. U.S. 883, 1336. 1903. TYPE: FLORIDA: Lake Co.: Vicinity of Eustis, 1-15 Jun 1894, Nash 967 (holotype: NY).
Azalea viscosa Azalea viscosa Linnaeus, Sp. Pl. 151. 1753. TYPE: VIRGINIA: Without data, Kalm s.n. (lectotype: LINN 215.4). Lectotypified by Kron, Edinburgh J. Bot. 50: 329. 1993.
Rhododendron serrulatum Rhododendron serrulatum (Small) Millais, forma molliculum Rehder, in E. H. Wilson & Rehder, Monogr. Azaleas 155. 1921. TYPE: FLORIDA: Lake Co.: Eustis, 23 Jun 1919, Harbison 17 (holotype: A?).
Rhododendron serrulatum Rhododendron serrulatum (Small) Millais, Rhododendrons 241. 1917.BASIONYM: Azalea serrulata Small 1903. 
Rhododendron viscosum var. serrulatum Rhododendron viscosum (Linnaeus) Torrey, var. serrulatum (Small) Ahles, J. Elisha Mitchell Sci. Soc. 80: 173. 1964.BASIONYM: Azalea serrulata Small 1903. 
Azalea glauca Azalea glauca Lamarck, Tabl. Encycl. 1: 493, t. 110(2). 1793.  
Azalea glauca var. hispida Azalea glauca Lamarck, var. hispida (Pursh) Heynhold, Nom. Bot. Hort. 108. 1840.BASIONYM: Azalea hispida Pursh 1814. 
Azalea glauca var. rosea Azalea glauca Lamarck, var. rosea Jaeger, Ziergeh. 118. 1865.  
Azalea hispida Azalea hispida Pursh, Fl. Amer. Sept. 154. 1814. TYPE: "New York and Pennsylvania"
Azalea lucida Azalea lucida Meerburgh, Pl. Select. Icon. Pict. t. 7. 1798.  
Azalea nitida Azalea nitida Pursh, Fl. Amer. Sept. 153. 1814. TYPE: "New York to Virginia",
Azalea viscosa subsp. glauca Azalea viscosa Linnaeus, subsp. glauca (Michaux ex Torrey) W. Stone, Pl. S. New Jersey 614. 1912 ("1911").BASIONYM: Rhododendron viscosum (Linnaeus) Torrey, var. glaucum Michaux ex Torrey 1824; Azalea viscosa Linnaeus, var. glauca Michaux 1803, non Aiton 1789. 
Azalea viscosa var. aemulans Azalea viscosa Linnaeus, var. aemulans (Rehder) Ashe, J. Elisha Mitchell Sci. Soc. 38: 91. 1922.BASIONYM: Rhododendron viscosum (Linnaeus) Torrey, var. aemulans Rehder 1921. 
Azalea viscosa var. alba Azalea viscosa Linnaeus, var. alba Ludwig, Neuere Wilde Baumz. 6. 1783.  
Azalea viscosa var. floribunda Azalea viscosa L., var. floribunda Aiton, Hort. Kew. 1: 203. 1789.  
Azalea viscosa var. glauca Azalea viscosa Linnaeus, var. glauca Aiton, Hort. Kew. 1: 204. 1789.  
Azalea viscosa var. glauca Azalea viscosa Linnaeus, var. glauca Michaux, Fl. Bor.-Amer. 1: 151. 1803, non Aiton 1789. TYPE: SOUTH CAROLINA:
Azalea viscosa var. hispida Azalea viscosa Linnaeus, var. hispida (Pursh) Hooker, Companion Bot. Mag. 1: 100. 1835.BASIONYM: Azalea hispida Pursh 1814. 
Azalea viscosa var. montana Azalea viscosa Linnaeus, var. montana (Rehder) Ashe, J. Elisha Mitchell Sci. Soc. 38: 91. 1922.BASIONYM: Rhododendron viscosum (Linnaeus) Torrey, var. montanum Rehder 1921. 
Azalea viscosa var. nitida Azalea viscosa Linnaeus, var. nitida (Pursh) A. Gray, Manual, ed. 2. 257. 1856.BASIONYM: Azalea nitida Pursh 1814. 
Azalea viscosa var. palustris Azalea viscosa Linnaeus, var. palustris Marshall, Arbust. Amer. 16. 1785.  
Azalea viscosa var. tomentosa Azalea viscosa Linnaeus, var. tomentosa Dumont de Courset, Bot. Cult., ed. 2. 3: 336. 1811.  
Azalea viscosa var. virens Azalea viscosa Linnaeus, var. virens Michaux, Fl. Bor.-Amer. 1: 151. 1803. TYPE: SOUTH CAROLINA:
Rhododendron coryi Rhododendron coryi Shinners, Castanea 26: 156. 1961. TYPE: TEXAS: Tyler Co.: Hyatt Bog 2 mi. S of Warren, 18 Apr 1950, Cory 57145 (holotype: SMU).
Rhododendron glaucum Rhododendron glaucum (Aiton) Sweet, Hort. Brit., ed. 2. 344. 1830.BASIONYM: Azalea viscosa Linnaeus, var. glauca Aiton 1789. 
Rhododendron hispidum Rhododendron hispidum (Pursh) Torrey, Fl. N. Middle United States 1: 425. 1824.BASIONYM: Azalea hispida Pursh 1814. 
Rhododendron nitidum Rhododendron nitidum (Pursh) Torrey, Fl. N. Middle United States 1: 425. 1824.BASIONYM: Azalea nitida Pursh 1814. 
Rhododendron serrulatum var. georgianum Rhododendron serrulatum (Small) Millais, var. georgianum Rehder, in E. H. Wilson & Rehder, Monogr. Azaleas 156. 1921. TYPE: GEORGIA: Charlton Co.: Folkston, 16 Jul 1918, Harbison 68 (holotype: A?).
Rhododendron viscosum forma coerulescens Rhododendron viscosum (Linnaeus) Torrey, forma coerulescens Rehder, in E. H. Wilson & Rehder, Monogr. Azaleas 165. 1921. TYPE: NORTH CAROLINA: Macon Co.: Highlands, 30 Sep 1918, Harbison 66 (holotype: A?).
Rhododendron viscosum forma glaucum Rhododendron viscosum (Linnaeus) Torrey, forma glaucum (Aiton) Voss, Vilm. Blumengärtn., ed. 3. 1: 588. 1894.BASIONYM: Azalea viscosa Linnaeus, var. glauca Aiton 1789. 
Rhododendron viscosum forma hispidum Rhododendron viscosum (Linnaeus) Torrey, forma hispidum (Pursh) Voss, Vilm. Blumengärtn., ed. 3. 1: 588. 1894.BASIONYM: Azalea hispida Pursh 1814. 
Rhododendron viscosum forma nitidum Rhododendron viscosum (Linnaeus) Torrey, forma nitidum (Pursh) Voss, Vilm. Blumengärtn., ed. 2. 1: 588. 1894.BASIONYM: Azalea nitida Pursh 1814. 
Rhododendron viscosum forma rhodanthum Rhododendron viscosum (Linnaeus) Torrey, forma rhodanthum Rehder, in E. H. Wilson & Rehder, Monogr. Azaleas 160. 1921. TYPE: MARYLAND: Prince Georges Co.: Opposite Hyattsville eastward, 31 May 1915, Steele s.n. (holotype: US).
Rhododendron viscosum forma roseum Rhododendron viscosum (Linnaeus) Torrey, forma roseum Hollick, Bull. Torrey Bot. Club 18: 256. 1891. TYPE: NEW YORK:
Rhododendron viscosum forma rubescens Rhododendron viscosum (Linnaeus) Torrey, forma rubescens Rehder, in E. H. Wilson & Rehder, Monogr. Azaleas 161. 1921.  
Rhododendron viscosum var. aemulans Rhododendron viscosum (Linnaeus) Torrey, var. aemulans Rehder, in E. H. Wilson & Rehder, Monogr. Azaleas 165. 1921. TYPE: GEORGIA: Randolph Co.: Near Cuthbert, 9 May 1918, Harbison 39 (holotype: A?).
Rhododendron viscosum var. glaucum Rhododendron viscosum (Linnaeus) Torrey, var. glaucum Michaux ex Torrey, Fl. N. Middle United States 425. 1824.BASIONYM: Azalea viscosa Linnaeus, var. glauca Michaux 1803. 
Rhododendron viscosum var. hispidum Rhododendron viscosum (Linnaeus) Torrey, var. hispidum (Pursh) C. K. Schneider, Ill. Handb. Laubholzk. 2: 502. 1911.BASIONYM: Azalea hispida Pursh 1814. 
Rhododendron viscosum var. montanum Rhododendron viscosum (Linnaeus) Torrey, var. montanum Rehder, in E. H. Wilson & Rehder, Monogr. Azaleas 164. 1921. TYPE: NORTH CAROLINA: Macon Co.: Highlands, 30 Sep 1918, Harbison 58 (holotype: A?).
Rhododendron viscosum var. nitidum Rhododendron viscosum (Linnaeus) Torrey, var. nitidum (Pursh) A. Gray, Syn. Fl. N. Amer. 2(1): 41. 1878.BASIONYM: Azalea nitida Pursh 1814. 
Rhododendron viscosum var. tomentosum Rhododendron viscosum (Linnaeus) Torrey, var. tomentosum (Dumont de Courset) Rehder, in E. H. Wilson & Rehder, Monogr. Azaleas 162. 1921.BASIONYM: Azalea viscosa Linnaeus, var. tomentosa Dumont de Courset 1811. 

Specimens

Country State County Date Specimen Notes Image
USA Florida Putnam Co. 24 Jun 1975 S. T. Cooper 683
USA Florida Hardee Co. 14 Oct 1976 R. J. Callahan s.n.
USA Florida Pasco Co. 16 Jun 1961 O. K. Lakela 24270
USA Florida Osceola Co. 14 Aug 1981 B. F. Hansen 8525
USA Florida Franklin Co. 10 Oct 2005 B. F. Hansen 13014
USA Florida Calhoun Co. 04 Jul 2008 T. MacClendon 810
USA Florida Manatee Co. 18 Sep 1993 S. Cole SF0178
USA Florida Manatee Co. 22 Sep 2005 C. Becker WC0633
USA Florida Putnam Co. 28 Apr 1990 S. L. Orzell 13252
USA Florida Orange Co. 30 Jun 1992 S. L. Orzell 19860
USA Florida Manatee Co. 02 Dec 1974 A.G. Shuey s.n.
USA Florida Hillsborough Co. 25 Aug 1975 A.G. Shuey s.n.
USA Florida Hardee Co. 15 Oct 1977 A.G. Shuey 2000
USA Florida Hardee Co. 04 Aug 1977 E. Kuczynski 38
USA Florida Highlands Co. 22 Jun 1993 S. Cole HH0005
USA Florida Marion Co. 04 May 1979 B. F. Hansen 5462
USA Florida Putnam Co. 06 Jun 1975 S. T. Cooper 613
USA Florida Duval Co. 14 Aug 2007 C. Slaughter 15776
USA Florida Santa Rosa Co. 22 May 1977 J. C. Solomon 5631
USA Florida Putnam Co. 24 Jun 1975 S. T. Cooper 683
USA Florida Seminole Co. 02 May 1960 G. R. Cooley 7455
USA Florida Lake Co. 1951 unknown 101
USA Florida Hernando Co. 19 Jun 1992 C. vanHoek 288
USA Florida Franklin Co. 28 Jul 1981 D. S. Correll 52278
USA Florida 11 Aug 1964 J. Neel 26
USA Florida Orange Co. 03 Sep 1974 L. Baltzell 6635
USA Florida Lake Co. 27 Jul 1978 R. F. Daubenmire s.n.
USA Florida Hillsborough Co. 22 Apr 1921 J. K. Small s.n.
USA Florida Hamilton Co. 28 Apr 1961 G. R. Cooley 8115
USA Florida Osceola Co. 17 Jul 1977 A.G. Shuey 1946
USA Florida Polk Co. 17 Jul 1977 A.G. Shuey 1944
USA Florida Liberty Co. 09 Jul 1955 R. K. Godfrey 53617
USA Florida Marion Co. 02 Aug 1962 D. B. Ward 3027
USA Florida Baker Co. 11 Jul 1984 B. F. Hansen 9968
USA Florida Hillsborough Co. 16 Apr 1975 A. G. Burdett s.n.
USA Florida Highlands Co. 14 Apr 1989 K. Holland s.n.
USA Florida Manatee Co. 21 Jul 1994 S. Cole LM0133
USA Florida Hillsborough Co. 01 Jun 1976 R. P. Wunderlin 5572
USA Florida DeSoto Co. 14 Oct 1976 R. C. Callahan s.n.
USA Florida Wakulla Co. 05 Jul 1979 B. F. Hansen 5846
USA Florida Leon Co. 18 Jul 1955 R. K. Godfrey 53661
USA Florida Highlands Co. 24 May 1981 J. Popenoe 1999
USA Florida Lake Co. 23 Mar 1981 B. F. Hansen 8168
USA Florida Okaloosa Co. 15 Aug 1983 G. Wilhelm 11652
USA Florida Santa Rosa Co. 12 Aug 1983 G. Wilhelm 11550
USA Florida Walton Co. 17 Aug 1983 G. Wilhelm 11775
USA Florida Clay Co. 10 Dec 1983 R. C. Callahan s.n.
USA Florida Santa Rosa Co. 17 Jun 1981 G. Wilhelm 9087
USA Florida Clay Co. 19 Jul 1981 J. Beckner 2532
USA Florida Pasco Co. 15 Jul 1977 T. F. Rochow s.n.
USA Florida Clay Co. 27 Jul 2000 C. Slaughter 12033
USA Florida Bay Co. 29 Nov 2001 W. F. Grey s.n.
USA Florida Hillsborough Co. 14 Jul 1998 J. Myers 87
USA Florida Clay Co. 12 Aug 1999 C. Slaughter 11163
USA Florida Putnam Co. 20 Jul 1961 R. R. Smith 423
USA Florida Marion Co. 18 Dec 1978 R. P. Wunderlin 6564
USA Florida Putnam Co. 06 Jun 1975 S. T. Cooper 613
USA Florida Walton Co. 29 Jul 1978 D. Persson 31-1-78
USA Florida Orange Co. 18 Apr 1964 R. R. Smith 933
USA Florida Polk Co. 13 Aug 1977 A.G. Shuey 1958
USA Florida Orange Co. 26 Jun 1930 M. Mulvania s.n.
USA Florida 12 Sep 1950 E. P. McNeill s.n.
USA Florida Clay Co. 25 Aug 1983 J. Watson 1764
USA Florida Hillsborough Co. 26 Jun 1962 C. F. Caudle 1216
USA Florida Hillsborough Co. 11 Jun 1963 C. F. Caudle 2539
USA Georgia Harris Co. 16 Sep 1971 S. B. Jones 21477
USA Georgia Harris Co. 16 May 1972 S. B. Jones 21843
USA North Carolina Robeson Co. 15 Jun 1959 R. F. Britt 2927
USA North Carolina Buncombe Co. 22 Jun 1965 M. Gillon 47
USA South Carolina Horry Co. 07 Jun 1977 D. W. Crewz 1017
USA South Carolina Pickens Co. 08 Jun 1956 H. E. Ahles 14337
USA Louisiana Vernon Par. 29 Apr 1955 G. R. Cooley 4010
USA Louisiana Bienville Par. 14 May 1977 C. M. Allen 7892
USA Louisiana St. Tammany Par. 05 Aug 1979 C. M. Allen 9326
USA Louisiana Vernon Par. 29 Apr 1955 G. R. Cooley 4010
USA Arkansas Saline Co. 29 May 1955 D. Demaree 36939
USA Arkansas Hempstead Co. 08 May 1925 J. K. Small 12438
USA South Carolina Jasper Co. 28 Jun 1956 R. C. Bell 3833
USA Arkansas Pike Co. 14 May 1955 D. Demaree 36792
USA Arkansas Montgomery Co. 03 Jun 1954 D. Demaree 35505
USA Mississippi Jackson Co. 03 Aug 1952 J. D. Ray, Jr. 2837
USA Georgia Screven Co. 09 Jul 1901 A. H. Curtiss 6837
USA Mississippi Pearl River Co. 19 Apr 1957 J. D. Ray, Jr. 8099
USA Mississippi Jackson Co. Jun 1892 J. Skehan 90a
USA Mississippi Harrison Co. 20 Aug 1951 R. B. Channell 373
USA Mississippi Harrison Co. 20 Aug 1951 D. Demaree 31142
USA Mississippi Jackson Co. 30 Jul 1951 D. Demaree 31041
USA Mississippi Jackson Co. 29 Jul 1952 D. Demaree 32381
USA Florida Highlands Co. 16 Jun 2015 C. Becker LJ0231
USA Florida Polk Co. 13 Jun 1962 C. F. Caudle 117
USA North Carolina Harnett Co. 16 Jun 1965 M. G. Ford 119
USA Florida 05 May 1974 J. H. Willson s.n.
USA Florida Hillsborough Co. 07 Oct 1988 T. Ries s.n.
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