Plant Index


 
 
 

Helianthus angustifolius

Helianthus angustifolius L.

swamp sunflower, narrowleaf sunflower

Synonym(s): Helianthus angustifolius var. planifolius
Cultivar(s): Gold Lace, Mellow Yellow
Helianthus angustifolius (Swamp Sunflower)
Image ID: 19348
Image by: Stuart, Will
Image Collection: NCBG Digital Library

PLANT INDEX

ID_PLANT: HEAN2
SCIENTIFIC NAME: Helianthus angustifolius
Include in WOTAS: 1
Publish to Web: 1
Last Modified: 2019-02-12

CULTIVAR INDEX

Cult_id Cultivar_name Action
1360 Gold Lace View
199 Mellow Yellow View

GENUS INDEX

GENUS CODE: HELIA3
GENUS SCIENTIFIC: Helianthus
GENUS AUTHORITY: L.
GENUS COMMON: Sunflower
GENUS SUMMARY: A genus of about 50 species, herbs, of North America.
GENUS IDENTIFICATION:
GENUS REFERENCES: Schilling in FNA (2006c); Heiser et al. (1969); Cronquist (1980)=SE; Schilling et al. (1998). Key adapted from FNA, SE, RAB, and Heiser et al. (1969).

FAMILY INDEX

FAMILY CODE: ASTERA
FAMILY SCIENTIFIC: Asteraceae
FAMILY AUTHORITY: Dumortier 1822 or COMPOSITAE Giseke 1792
FAMILY COMMON: Aster Family
FAMILY SUMMARY: A family of about 1500-1700 genera and 20,000-25,000 species, shrubs, herbs, trees, and vines, cosmopolitan in distribution.
FAMILY REFERENCE: Cronquist (1980)=SE throughout family treatment.

NCBG DESCRIPTIVES

INTRO: Erect perennial of savannas, ditches, marshes and other wet habitats.
STEMS: Stems branched, leafy and rough-hairy.
LEAVES: Leaves alternate (upper) and opposite (lower, short-petiolate to sessile, linear, to 8 in. long, with margins curled under, rough-hairy above and pale green and soft-hairy beneath.
INFLORESCENCE:
FLOWERS: Composite flowers (heads) solitary or in small clusters, 1 1/2-3 in. wide, consisting of 8-21 yellow ray florets encircling a center disk of reddish to purplish-brown tubular florets. Overlapping, narrow, pointed bracts surround the base of each head.
FRUITS: Fruit a dark brown, rounded achene.
COMMENTS:
HEIGHT: 1-6 ft.

DURATION: Perennial
HABIT: Herb

LEAF ARRANGEMENT: Alternate
LEAF COMPLEXITY: Simple
LEAF RETENTION:

FLORAL CHARACTERISTICS
SYMMETRY: Mixed
BLOOM TIME: Sept.-Oct. (frost)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
x x x x

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

FRUITING PERIOD:

DISTRIBUTION
HABITAT TYPE: Bottomlands, Moist forests, Pine savannas
NATIVE RANGE: eastern United States

HORTICULTURAL
Plant Sale Text: Easy to grow and extremely showy, swamp sunflower produces upright stems of buttery yellow flowers with dark centers, each flower 2 to 3 inches across. Plant it where it has room to reach its full-grown stature. Swamp sunflower makes a fine cut flower. Butterflies flock to it as a source of nectar, and birds enjoy eating its seeds. Swamp sunflower is seen growing in savannahs and wet meadows, primarily in the coastal plain and lower Piedmont. The Helianthus genus supports up to 73 lepidoptera species.

Bloom Table Text: One of the last of the sunflowers to bloom in autumn, the swamp sunflower is by any measure one of the most glorious. While most common in the coastal plain in savannas and ditches, it is also seen along roadsides here in the piedmont. Growing to seven feet in height, it is covered with numerous black-eyed, yellow flowers. Swamp sunflower thrives in most soils and is considered an excellent nectar source for butterflies and the seeds are a valuable food source that will guarantee goldfinches visiting your garden.

NCBG Location: Children's Wonder Garden, Coastal Plain Habitat, Education Center Landscape, Native Perennial Border, Piedmont Habitat

Cultural Notes:

SOIL MOISTURE: Average, Moist/Wet
LIGHT EXPOSURE: Sun, Part Shade, Shade
MINIMUM HARDINESS ZONE: 3
MAXIMUM HARDINESS ZONE: 9
GERMINATION CODE:
WILDLIFE VALUE: Bee Friendly, Butterfly Friendly, Bird Friendly
DEER RESISTANCE:

GRIM ACCESSIONS

acc_id acc_num acc_dt coll_id Action
79 2013-0027 2013-11-27 82 View
2539 1986-2424 View
7046 1998-0332 1998-11-18 View
7675 2001-0029 2001-04-12 View
8864 2011-0028 2011-01-27 1875 View
9139 2006-0640 2006-12-18 1435 View


GRIM COLLECTIONS

Coll_id Project Collection date Collector Action
82 HORT 2003-11-06 Bryan View
1102 HORT 2006-12-01 Bryan View
1117 HORT 2005-10-01 Bryan View
1435 HORT View
1757 HORT 2005-01-01 Bryan View
1850 HORT 2006-11-01 Bryan View
1875 HORT 2010-09-04 Gocke View
2097 NPMD 2020-11-06 Summer View


GRIM PLANTINGS

plt_num acc_id loc_num pers_num inst_dt Action
104 79 142 Liloia 2013-10-03 View
970 8864 44 NCBG staff 2011-05-10 View
4292 2539 64 NCBG staff 1984-03-11 View
9926 7046 51 NCBG staff 1998-11-01 View
10856 7675 115 NCBG staff 1967-01-01 View
11995 9139 139 NCBG staff 0000-00-00 View
12263 8864 42 Mixon 2012-03-21 View

USDA PLANTS DATABASE

USDA Symbol: HEAN2
USDA Common Name: Swamp Sunflower
Native Status: L48 (N)
Distribution: USA (AL, AR, DC, DE, FL, GA, IL, IN, KY, LA, MD, MO, MS, NC, NJ, NY, OH, OK, PA, SC, TN, TX, VA, WV)
Duration: Perennial
Growth Habit: Forb/herb

NATIONAL WETLAND INDICATOR STATUS

Region:AGCPAKAWCBEMPGPHIMWNCNEWMVE
Status: FACW FACW FAC FACW 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: Helianthus angustifolius
COMMON NAME: Narrowleaf Sunflower
SYNONYMY: [= C, FNA, G, GW, Il, K, Pa, RAB, S, SE, Va, W, WH3, WV; > H. angustifolius var. angustifolius - F; > H. angustifolius var. planifolius Fernald - F]
PHENOLOGY: (Jul-) Sep-Oct (-frost).
HABITAT: Savannas, ditches, marshes, other wet habitats.
COMMENTS: Primarily Coastal Plain, from Long Island, NY south to c. peninsular FL and west to TX, irregularly inland to OH, IN, and MO. This plant is very showy when in flower on roadsides, especially in Oct.
RANGE MAP: Helianthus angustifolius.png

Key to Map Symbols
ABOUT FAMILY (Weakley Flora)
Asteraceae Dumortier 1822 or COMPOSITAE Giseke 1792 (Aster Family)
SUMMARY: A family of about 1500-1700 genera and 20,000-25,000 species, shrubs, herbs, trees, and vines, cosmopolitan in distribution.
REFERENCE: Cronquist (1980)=SE throughout family treatment.
ABOUT GENUS (Weakley Flora)
Helianthus L. (Sunflower)
SUMMARY: A genus of about 50 species, herbs, of North America.
REFERENCE: Schilling in FNA (2006c); Heiser et al. (1969); Cronquist (1980)=SE; Schilling et al. (1998). Key adapted from FNA, SE, RAB, and Heiser et al. (1969).

HERBARIUM RESOURCES

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

WEB RESOURCES

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

NCBG IMAGE RECORDS

ID IMAGE1: 19348
ID IMAGE2: 0
ID IMAGE3: 19348

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43 photo(s) available in the Image Gallery

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