Plant Index


 
 
 
 

Rhododendron arborescens

Rhododendron arborescens (Pursh) Torr.

smooth azalea, sweet azalea

Synonym(s): Azalea arborescens, Rhododendron arborescens var. richardsonii
Rhododendron arborescens (Smooth Azalea)
Image ID: 12676
Image by: Cressler, Alan M.
Image Collection: NCBG Digital Library

PLANT INDEX

ID_PLANT: RHAR3
SCIENTIFIC NAME: Rhododendron arborescens
Include in WOTAS: 0
Publish to Web: 1
Last Modified: 2017-09-26

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: 8-12 ft.

DURATION: Perennial
HABIT: Shrub

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

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

BLOOM COLOR: White to light 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: Smooth azalea is the latest blooming of the spring native azaleas. White to light-pink flowers with striking red stamens emerge in June. The flowers beckon to pollinators with their fragrance. Foliage turns deep red to purple in fall extending. It has a loosely branched form that spreads as wide as it is tall. Be sure to plant it in a moist and shaded location as while fast growing it does not tolerate droughty conditions well. The Rhododendron genus supports up to 50 lepidoptera species.

Bloom Table Text:

NCBG Location:

Cultural Notes:

SOIL MOISTURE: Dry, Average, Moist/Wet
LIGHT EXPOSURE: Sun, Part Shade, Shade
MINIMUM HARDINESS ZONE: 5
MAXIMUM HARDINESS ZONE: 9
GERMINATION CODE:
WILDLIFE VALUE: Bee Friendly, Butterfly Friendly
DEER RESISTANCE:

GRIM ACCESSIONS

acc_id acc_num acc_dt coll_id Action
3736 1991-0431 View
4565 1992-0721 View
6895 1998-0102 View
6974 1998-0186 View
7415 2000-0158 2000-04-19 View
7727 2001-0082 2001-05-22 View
8312 2005-0028 2005-03-17 View


GRIM COLLECTIONS

Coll_id Project Collection date Collector Action
1426 HORT 2006-11-28 Bryan View
1543 HORT 2005-03-08 Bryan View


GRIM PLANTINGS

plt_num acc_id loc_num pers_num inst_dt Action
6043 3736 199 NCBG staff 0000-00-00 View
6894 4565 200 NCBG staff 1993-03-01 View
9758 6895 166 NCBG staff 1997-11-07 View
10919 7727 66 NCBG staff 1967-12-31 View

USDA PLANTS DATABASE

USDA Symbol: RHAR3
USDA Common Name: Smooth Azalea
Native Status: L48 (N)
Distribution: USA (AL, GA, KY, MD, MS, NC, NY, PA, SC, TN, VA, WV)
Duration: Perennial
Growth Habit: Shrub

NATIONAL WETLAND INDICATOR STATUS

Region:AGCPAKAWCBEMPGPHIMWNCNEWMVE
Status: FACW FAC FAC

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 arborescens
COMMON NAME: Sweet Azalea, Smooth Azalea
SYNONYMY: [= C, F, FNA, G, K, L, Pa, RAB, Va, W, WV, Z; = Azalea arborescens Pursh - S]
PHENOLOGY: Late May-Jul; Jul-Oct.
HABITAT: Rocky riversides, wooded stream banks, swamps, high elevation forests, shrub balds.
COMMENTS: Primarily Appalachian: ne. PA and se. KY south to sc. NC, w. SC, c. GA, and c. AL.
RANGE MAP: Rhododendron arborescens.png

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

WEB RESOURCES

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

IMAGE USE RECORDS

ID IMAGE: 12676 - Primary Image FloraQuest Plant Detail Page (Landscape Preferred)
ID IMAGE1: 12676 - Primary Image WOTAS
ID IMAGE2: 13042 - Secondary Image WOTAS
ID IMAGE3: 18597 - Primary Image Plant Sale Sign (Landscape Only)
ID IMAGE4: 0 - Primary Image New Plant Sale Label (Portrait Only)

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30 photo(s) available in the Image Gallery

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