Plant Index


 
 
 

Rhododendron viscosum

Rhododendron viscosum (L.) Torr.

swamp azalea, clammy azalea

Synonym(s): Azalea serrulata, Azalea viscosa, Rhododendron coryi, Rhododendron serrulatum, Rhododendron viscosum var. aemulans, Rhododendron viscosum var. glaucum, Rhododendron viscosum var. montanum, Rhododendron viscosum var. nitidum, Rhododendron viscosum var. serrulatum, Rhododendron viscosum var. tomentosum
Cultivar(s): Delaware Blue, Jolie Madame, Lemon Drop, Rosita, Summer Eyelet
Rhododendron viscosum (Swamp Azalea)
Image ID: 16164
Image by: Sorrie, Bruce A.
Image Collection: NCBG Digital Library

PLANT INDEX

ID_PLANT: RHVI2
SCIENTIFIC NAME: Rhododendron viscosum
Include in WOTAS: 0
Publish to Web: 1
Last Modified: 2017-01-01

CULTIVAR INDEX

Cult_id Cultivar_name Action
945 Delaware Blue View
946 Jolie Madame View
180 Lemon Drop View
947 Rosita View
1715 Summer Eyelet View

GENUS INDEX

GENUS CODE: RHODO
GENUS SCIENTIFIC: Rhododendron
GENUS AUTHORITY: L.
GENUS COMMON: Rhododendron
GENUS SUMMARY: A genus of about 860 species, shrubs and trees, mostly north temperate (centered in Himalayan Asia). Molecular evidence appears to show that Menziesia should be included in Rhododendron, and is actually closely related within Rhododendron to R. vaseyi (Goetsch, Eckert, & Hall 2005; Kurashige et al. 2001); while the urceolate corolla is rather anomalous in Rhododendron, many other characters ally Menziesia with basal clades in Rhododendron s.l.
GENUS IDENTIFICATION: Identification notes: This key makes as much use as possible of vegetative characters, geography, and capsule characters; capsules are generally available for longer during the year than flowers, and even when plants are in flower, last years capsules can often be found.
GENUS REFERENCES: Judd & Kron in FNA (2009); Fabijan in FNA (2009); Kron (1993)=Z; Judd & Kron (1995)=Y; Chamberlain (1982)=X; Cullen (1980)=Q; Davidian (1982)=D; Craven (2011)=U; Duncan & Pullen (1962)=V; Goetsch, Eckert, & Hall (2005); Towe (2004); Kron & Creel (1999); Stevens et al. in Kubitzki (2004).

FAMILY INDEX

FAMILY CODE: ERICAC
FAMILY SCIENTIFIC: Ericaceae
FAMILY AUTHORITY: A.L. de Jussieu 1789
FAMILY COMMON: Heath Family
FAMILY SUMMARY: A family of about 107-124 genera and 3400-4100 species, primarily shrubs, small trees, and subshrubs, nearly cosmopolitan. The Ericaceae is very important in our area, which is one of the north temperate centers of diversity for the Ericaceae, with a great diversity of genera and species, many of them rather narrowly endemic. Along with Quercus and Pinus, various members of this family are dominant in much of our landscape.
FAMILY REFERENCE: Tucker in FNA (2009); Gillespie & Kron (2010, 2013); Kron et al. (2002); Wood (1961); Judd & Kron (1993); Kron & Chase (1993); Luteyn et al. (1996)=L; Dorr & Barrie (1993); Cullings & Hileman (1997); Stevens et al. in Kubitzki (2004).

NCBG DESCRIPTIVES

INTRO:
STEMS:
LEAVES:
INFLORESCENCE:
FLOWERS:
FRUITS:
COMMENTS:
HEIGHT: 5 feet

DURATION: Perennial
HABIT: Shrub

LEAF ARRANGEMENT: Alternate
LEAF COMPLEXITY: Simple
LEAF RETENTION: Deciduous

FLORAL CHARACTERISTICS
SYMMETRY:
BLOOM TIME: Jun-Jul
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
x x x x x

BLOOM COLOR: White to pink flowers
White Red Pink Orange Yellow Green Blue Lavender Purple Violet Brown Not Applicable
x x

FRUITING PERIOD: Jul-Oct.

DISTRIBUTION
HABITAT TYPE:
NATIVE RANGE: eastern United States

HORTICULTURAL
Plant Sale Text: Swamp azalea is one of the last azaleas to bloom in spring. The sweet-scented flowers are white, with a lavender tube slightly enlarged at the base, 1 1/4–1 ¾ inches long with 5 narrow, petal-like spreading lobes. The 5 stamens are extended. Fall foliage is orange to maroon. Hummingbirds are attracted to the flowers.

Bloom Table Text:

NCBG Location:

Cultural Notes:

SOIL MOISTURE: Average, Moist/Wet
LIGHT EXPOSURE: Sun, Part Shade, Shade
MINIMUM HARDINESS ZONE: 6
MAXIMUM HARDINESS ZONE: 10
GERMINATION CODE:
WILDLIFE VALUE: Bee Friendly, Butterfly Friendly, Hummingbird Friendly
DEER RESISTANCE:

GRIM ACCESSIONS

acc_id acc_num acc_dt coll_id Action
51 2014-0007 2014-12-16 53 View
1036 1985-0749 View
1052 1985-0772 View
2011 1986-1804 View
2120 1986-1924 View
3137 1989-0100 View
6616 1996-0251 View
6725 1996-0380 View
6902 1998-0109 View
7416 2000-0159 2000-04-19 View
7728 2001-0083 2001-05-22 View
7781 2001-0137 2001-06-27 View
8919 1986-2365 0000-00-00 1188 View
9182 2017-0045 2020-04-08 1938 View


GRIM COLLECTIONS

Coll_id Project Collection date Collector Action
53 HORT 2006-11-15 Walker View
1188 HORT 1980-01-01 View
1938 HORT 2017-04-01 MacIntyre View


GRIM PLANTINGS

plt_num acc_id loc_num pers_num inst_dt Action
67 51 32 NCBG staff 2014-10-01 View
1919 1036 160 NCBG staff 0000-00-00 View
1935 1052 160 NCBG staff 1980-03-18 View
3236 2011 6 NCBG staff 1986-12-23 View
3573 2120 189 NCBG staff 1986-12-31 View
4264 8919 9 NCBG staff 1980-01-01 View
4265 8919 205 NCBG staff 1980-01-01 View
5260 3137 78 NCBG staff 1989-02-02 View
9343 6616 27 NCBG staff 1996-03-06 View
9344 6616 142 NCBG staff 1996-03-06 View
9493 6725 118 NCBG staff 1967-12-01 View
9765 6902 166 NCBG staff 1967-12-31 View
10920 7728 142 NCBG staff 2001-05-01 View
10985 7781 56 NCBG staff 1978-01-01 View
12152 9182 162 MacIntyre 2017-04-01 View

USDA PLANTS DATABASE

USDA Symbol: RHVI2
USDA Common Name: Swamp Azalea
Native Status: L48 (N)
Distribution: USA (AL, AR, CT, DC, DE, FL, GA, LA, MA, MD, ME, MS, NC, NH, NJ, NY, OK, PA, RI, SC, TN, TX, VA, VT, WV)
Duration: Perennial
Growth Habit: Shrub

NATIONAL WETLAND INDICATOR STATUS

Region:AGCPAKAWCBEMPGPHIMWNCNEWMVE
Status: OBL FACW FACW OBL FACW

This information is derived from the U.S. Army Corps of Engineers 2016 National Wetland Plant List, Version 3.3 (Lichvar, R.W., D.L. Banks, W.N. Kirchner, and N.C. Melvin. 2016. The National Wetland Plant List: 2016 wetland ratings. Phytoneuron 2016-30: 1-17. Published 28 April 2016. ISSN 2153 733X). Regions: AGCP-Atlantic and Gulf Coastal Plain, AK-Alaska, AW-Arid West, CB-Caribbean, EMP-Eastern Mountains and Piedmont, GP-Great Plains, HI-Hawaii, MW-Midwest, NCNE-Northcentral and Northeast, WMCV-Western Mountains, Valleys & Coast

WEAKLEY FLORA

SCIENTIFIC NAME: Rhododendron viscosum var. viscosum
COMMON NAME: Swamp Azalea, Clammy Azalea
SYNONYMY: [= RAB; < R. viscosum - FNA, GW, K, L, Pa, Va, W, WH3, WV; = R. viscosum - C, F, G; = Azalea viscosa Linnaeus - S]
PHENOLOGY: Jun-Jul; Jul-Oct.
HABITAT: Moist streambanks, shrub balds, and other moist habitats.
COMMENTS: ME and OH south to FL, west to LA and TX.
RANGE MAP:

Key to Map Symbols
ABOUT FAMILY (Weakley Flora)
Ericaceae A.L. de Jussieu 1789 (Heath Family)
SUMMARY: A family of about 107-124 genera and 3400-4100 species, primarily shrubs, small trees, and subshrubs, nearly cosmopolitan. The Ericaceae is very important in our area, which is one of the north temperate centers of diversity for the Ericaceae, with a great diversity of genera and species, many of them rather narrowly endemic. Along with Quercus and Pinus, various members of this family are dominant in much of our landscape.
REFERENCE: Tucker in FNA (2009); Gillespie & Kron (2010, 2013); Kron et al. (2002); Wood (1961); Judd & Kron (1993); Kron & Chase (1993); Luteyn et al. (1996)=L; Dorr & Barrie (1993); Cullings & Hileman (1997); Stevens et al. in Kubitzki (2004).
ABOUT GENUS (Weakley Flora)
Rhododendron L. (Rhododendron)
SUMMARY: A genus of about 860 species, shrubs and trees, mostly north temperate (centered in Himalayan Asia). Molecular evidence appears to show that Menziesia should be included in Rhododendron, and is actually closely related within Rhododendron to R. vaseyi (Goetsch, Eckert, & Hall 2005; Kurashige et al. 2001); while the urceolate corolla is rather anomalous in Rhododendron, many other characters ally Menziesia with basal clades in Rhododendron s.l.
REFERENCE: Judd & Kron in FNA (2009); Fabijan in FNA (2009); Kron (1993)=Z; Judd & Kron (1995)=Y; Chamberlain (1982)=X; Cullen (1980)=Q; Davidian (1982)=D; Craven (2011)=U; Duncan & Pullen (1962)=V; Goetsch, Eckert, & Hall (2005); Towe (2004); Kron & Creel (1999); Stevens et al. in Kubitzki (2004).

HERBARIUM RESOURCES

SERNEC: Find Rhododendron viscosum in Southeast Regional Network of Experts and Collections (if available)
UNC SERNEC: Find Rhododendron viscosum in University of North Carolina Chapel Hill Herbarium - Southeast Regional Network of Experts and Collections (if available)

WEB RESOURCES

USDA: Find Rhododendron viscosum in USDA Plants
NPIN: Find Rhododendron viscosum in NPIN Database
FNA: Find Rhododendron viscosum in the Flora of North America (if available)
Google: Search Google for Rhododendron viscosum

NCBG IMAGE RECORDS

ID IMAGE1: 16164
ID IMAGE2: 16250
ID IMAGE3: 21358

From the Image Gallery


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15 photo(s) available in the Image Gallery

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