Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Helianthus schweinitzii
FAMILY
Asteraceae
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Schweinitz's Sunflower at Vascular Plants of North Carolina.
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Helianthus schweinitzii
FAMILY
Asteraceae
SYNONYMOUS WITH Flora of North America north of Mexico, vol. 19-20-21 (2006)
Helianthus schweinitzii
SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-65-003:
Helianthus schweinitzii FAMILY Asteraceae
SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)
Helianthus schweinitzii
COMMON NAME:
Schweinitz's Sunflower
To see larger pictures, click or hover over the thumbnails.
)
JK Marlow jkm060928_017
September York County SC
Utility right-of-way
)
JK Marlow jkm060928_125
September York County SC
Utility right-of-way
)
Will Stuart wil_3932516321_f2c6caba99
September York County SC
Blackjacks Heritage Preserve
8-15 ray florets; lobes of disc florets yellow, anthers dark brown to black, per Flora of North America.
)
Will Stuart wil_schweinileafstem_1177
September Union County NC
Leaves are slender, single veined, and very rough to the touch. — Will Stuart
)
Will Stuart wil_schweinitzgroup_1547
September Union County NC
Flower heads less than 2" across with yellow ray and disk flowers, per Wildflowers & Plant Communities of the Southern Appalachian Mountains and Piedmont (Spira, 2011).
)
JK Marlow jkm0411f_18
November York County SC
Blackjacks Heritage Preserve
Leaves scabrous above, tomentose beneath, short-petiolate to sessile, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Helianthus schweinitzii
FAMILY
Asteraceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Helianthus schweinitzii
FAMILY
Asteraceae
SYNONYMOUS WITH
Flora of North America north of Mexico, vol. 19-20-21
Helianthus schweinitzii
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-65-003:
Helianthus schweinitzii
FAMILY
Asteraceae
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933, 1938)
Helianthus schweinitzii
651
Forb
Perennial
Habitat: Clayey soils of woodlands and roadsides, in areas formerly with post oak-blackjack oak savannas, xeric oak-pine woodlands, or "Piedmont prairies", now primarily on mowed road or powerline rights-of-way, per Weakley's Flora
Native to the Carolinas
Rare (occurring primarily within 100 km of Charlotte, NC)
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
LEAVES:
Simple
Lower opposite, upper alternate
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!
- Guide to the Wildflowers of SC, 1st ed. (Porcher & Rayner, 2001) p218
- Guide to the Wildflowers of SC, 2nd ed. (McMillan, Porcher, Rayner, & White; 2022) p273
- Wildflowers & Plant Communities of the Southern Appalachian Mountains and Piedmont (Spira, 2011) p382
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