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 strumosus   FAMILY Asteraceae   Go to FSUS key



SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Helianthus strumosus   FAMILY Asteraceae

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

Helianthus strumosus

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-65-019:

Helianthus strumosus   FAMILY Asteraceae

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)

Helianthus montanus

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)

Helianthus saxicolus

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)

Helianthus strumosus

 

COMMON NAME:
Roughleaf Sunflower, Paleleaf Woodland Sunflower, Paleleaf Sunflower


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

image of Helianthus strumosus, Roughleaf Sunflower, Paleleaf Woodland Sunflower, Paleleaf Sunflower

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_hest_001_lvd

        

image of Helianthus strumosus, Roughleaf Sunflower, Paleleaf Woodland Sunflower, Paleleaf Sunflower

JK Marlow    jkm210824_2973

August    Greenville County    SC

Tall Pines Wildlife Management Area

Differs from H. tuberosus in its glabrous/glabrate stems and lack of tubers, per Flora of North America.

image of Helianthus strumosus, Roughleaf Sunflower, Paleleaf Woodland Sunflower, Paleleaf Sunflower

JK Marlow    jkm190905_1352

September    Greenville County    SC

Tall Pines Wildlife Management Area

Plants rhizomatous, but not producing tubers, per Weakley's Flora (2018).

image of Helianthus strumosus, Roughleaf Sunflower, Paleleaf Woodland Sunflower, Paleleaf Sunflower

JK Marlow    jkm190905_1354

September    Greenville County    SC

Tall Pines Wildlife Management Area

Heads with 8-15 yellow ray florets encircling tubular yellow disk florets, per Wildflowers of the Atlantic Southeast (Cotterman, Waitt, & Weakley, 2019).

image of Helianthus strumosus, Roughleaf Sunflower, Paleleaf Woodland Sunflower, Paleleaf Sunflower

JK Marlow    jkm190905_1355

September    Greenville County    SC

Tall Pines Wildlife Management Area

Flower heads mostly solitary at the ends of branches, per Wildflowers of the Atlantic Southeast (Cotterman, Waitt, & Weakley, 2019).

image of Helianthus strumosus, Roughleaf Sunflower, Paleleaf Woodland Sunflower, Paleleaf Sunflower

JK Marlow    jkm190905_1357

September    Greenville County    SC

Tall Pines Wildlife Management Area

Overlapping, spreading, narrow and pointed bracts with hairy margins, per Wildflowers of the Atlantic Southeast (Cotterman, Waitt, & Weakley, 2019).

image of Helianthus strumosus, Roughleaf Sunflower, Paleleaf Woodland Sunflower, Paleleaf Sunflower

JK Marlow    jkm190905_1359

September    Greenville County    SC

Tall Pines Wildlife Management Area

Leaves thick, lanceolate, 8-14cm long, acuminate, serrate, scabrous above, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).

image of Helianthus strumosus, Roughleaf Sunflower, Paleleaf Woodland Sunflower, Paleleaf Sunflower

JK Marlow    jkm190905_1360

September    Greenville County    SC

Tall Pines Wildlife Management Area

image of Helianthus strumosus, Roughleaf Sunflower, Paleleaf Woodland Sunflower, Paleleaf Sunflower

Richard and Teresa Ware    rtw_h_strumosus_2

September        

Rays usually 10+ in larger heads; anther appendages dark or reddish-brown, per Weakley's Flora (2018).

 

 

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

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Helianthus strumosus   FAMILY Asteraceae

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

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-65-019:
Helianthus strumosus   FAMILY Asteraceae

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Helianthus montanus

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Helianthus saxicolus

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Helianthus strumosus

 

Find by SCIENTIFIC NAME:

653

Forb
Perennial

Habitat: woodlands and roadsides, per Weakley's Flora

Native to the Carolinas & Georgia

Common (rare in Coastal Plain)

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

LEAVES:
Simple
Opposite, sometimes alternate

RHIZOMES? STOLONS?
Rhizomatous, but not producing tubers

FLOWER:
Summer/Fall
Rays: Yellow
Disc: Yellow
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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