OF THE CAROLINAS & GEORGIA

Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Helianthus angustifolius   FAMILY Asteraceae   Go to FSUS key



SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Helianthus angustifolius   FAMILY Asteraceae

SYNONYMOUS WITH Flora of North America north of Mexico, vol. 19-20-21 (2006)

Helianthus angustifolius

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-65-002:

Helianthus angustifolius   FAMILY Asteraceae

SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)

Helianthus angustifolius

 

COMMON NAME:
Narrowleaf Sunflower, Swamp Sunflower


         To see larger pictures, click or hover over the thumbnails.

image of Helianthus angustifolius, Narrowleaf Sunflower, Swamp Sunflower

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_hean2_001_lvd

        

image of Helianthus angustifolius, Narrowleaf Sunflower, Swamp Sunflower

USDA-NRCS PLANTS Database / USDA Wetland flora: Field office illustrated guide    pnd_hean2_007_lvd

        

image of Helianthus angustifolius, Narrowleaf Sunflower, Swamp Sunflower

JK Marlow    jkm120922_097

September    Greenville County    SC

SC Native Plant Society Plant Sale

Ray flowers 8-21, narrow; disk purple, flattened, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).

image of Helianthus angustifolius, Narrowleaf Sunflower, Swamp Sunflower

JK Marlow    jkm120922_101

September    Greenville County    SC

SC Native Plant Society Plant Sale

Leaves densely pubescent (but not tomentose) beneath, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).

image of Helianthus angustifolius, Narrowleaf Sunflower, Swamp Sunflower

JK Marlow    jkm120922_103

September    Greenville County    SC

SC Native Plant Society Plant Sale

Involucral bracts in several series, lanceolate to linear, acuminate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).


click here to see other plants that look similar to this COMPARE involucral bracts of Sunflowers

image of Helianthus angustifolius, Narrowleaf Sunflower, Swamp Sunflower

JK Marlow    jkm081009_030

October    Dorchester County    SC

Leaves narrow, sessile, w rough surfaces & revolute (curled under) margins, per Atlantic Coastal Plain Wildflowers (Nelson, 2006).

image of Helianthus angustifolius, Narrowleaf Sunflower, Swamp Sunflower

JK Marlow    jkm081009_031

October    Dorchester County    SC

Heads on long stalks, per Forest Plants of the Southeast and Their Wildlife Uses (Miller & Miller, 2005).

image of Helianthus angustifolius, Narrowleaf Sunflower, Swamp Sunflower

JK Marlow    jkm081009_173

October    Dorchester County    SC

McAlhany Nature Preserve

image of Helianthus angustifolius, Narrowleaf Sunflower, Swamp Sunflower

JK Marlow    jkm081009_177

October    Dorchester County    SC

McAlhany Nature Preserve

image of Helianthus angustifolius, Narrowleaf Sunflower, Swamp Sunflower

JK Marlow    jkm081009_178

October    Dorchester County    SC

McAlhany Nature Preserve

Plants 3-6' tall with a purplish to greenish herbaceous stem, per Atlantic Coastal Plain Wildflowers (Nelson, 2006).

image of Helianthus angustifolius, Narrowleaf Sunflower, Swamp Sunflower

JK Marlow    jkm161001_822

September    Chesterfield County    SC

Carolina Sandhills National Wildlife Refuge

image of Helianthus angustifolius, Narrowleaf Sunflower, Swamp Sunflower

JK Marlow    jkm161001_831

September    Chesterfield County    SC

Carolina Sandhills National Wildlife Refuge

image of Helianthus angustifolius, Narrowleaf Sunflower, Swamp Sunflower

JK Marlow    jkm161001_832

September    Chesterfield County    SC

Carolina Sandhills National Wildlife Refuge

image of Helianthus angustifolius, Narrowleaf Sunflower, Swamp Sunflower

JK Marlow    jkm231025_6318

October    Greenville County    SC

Ashmore Heritage Preserve

image of Helianthus angustifolius, Narrowleaf Sunflower, Swamp Sunflower

Richard and Teresa Ware    rtw_h_angustifolius_3

October        

image of Helianthus angustifolius, Narrowleaf Sunflower, Swamp Sunflower

Richard and Teresa Ware    rtw_h_angustifolius_9

October        

 

 

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Helianthus angustifolius   FAMILY Asteraceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Helianthus angustifolius   FAMILY Asteraceae

SYNONYMOUS WITH Flora of North America north of Mexico, vol. 19-20-21
Helianthus angustifolius

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-65-002:
Helianthus angustifolius   FAMILY Asteraceae

SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)
Helianthus angustifolius

 

Find by SCIENTIFIC NAME:

644

Forb
Perennial

Habitat: pine savannas, ditches, marshes, other wet habitats, per Weakley's Flora

Native to the Carolinas & Georgia

Common in GA, in Coastal Plain, & in SC Piedmont (rare in NC Mountains, uncommon elsewhere in GA-NC-SC)

map
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.

Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)

LEAVES:
Simple
Lower opposite, upper alternate

RHIZOMES? STOLONS?
Rhizomes absent or poorly developed

FLOWER:
Summer/Fall
Rays: Yellow
Disc: Purplish-red
Inferior ovary
Disc flowers bisexual & fertile/ Ray flowers pistillate but sterile

FRUIT:
Summer/Fall
Brown
Achene

 

TO LEARN MORE about this plant, look it up in a good book!



 


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