Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Tetragonotheca helianthoides
FAMILY
Asteraceae
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Pineland Squarehead at Vascular Plants of North Carolina.
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Tetragonotheca helianthoides
FAMILY
Asteraceae
SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Tetragonotheca helianthoides
SYNONYMOUS WITH Flora of North America
Tetragonotheca helianthoides
SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-60-001:
Tetragonotheca helianthoides FAMILY Asteraceae
SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)
Tetragonotheca helianthoides
COMMON NAME:
Pineland Squarehead, Pineland-ginseng
To see larger pictures, click or hover over the thumbnails.
)
USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913 pnd_tehe2_001_lvd
)
JK Marlow jkm180504_1663
May Meriwether-Talbot Counties GA
Sprewell Bluff WMA
)
JK Marlow jkm180504_1666
May Meriwether-Talbot Counties GA
Sprewell Bluff WMA
There are 6-14 yellow rays, well-separated from one another, per Wildflowers of the Sandhills Region (Sorrie, 2011).
)
JK Marlow jkm180504_1667
May Meriwether-Talbot Counties GA
Sprewell Bluff WMA
)
JK Marlow jkm180504_1693
May Meriwether-Talbot Counties GA
Sprewell Bluff WMA
)
JK Marlow jkm180504_465
May Meriwether-Talbot Counties GA
Sprewell Bluff WMA
Stem and leaves hairy and somewhat sticky from tiny beadlike glands, per Atlantic Coastal Plain Wildflowers (Nelson, 2006).
)
JK Marlow jkm180504_466
May Meriwether-Talbot Counties GA
Sprewell Bluff WMA
)
Richard and Teresa Ware rtw_t_helianthoides
May
Squarehead gets its name from the 4 outer bracts just below the flower head, per Wildflowers of the Sandhills Region (Sorrie, 2011).
)
Will Stuart wil_t_helianthoides_291
May Richmond County NC
North Carolina Sandhills Gamelands
Stems erect to ascending, 1-3' tall, few-branched, pubescent, per Wildflowers of the Sandhills Region (Sorrie, 2011).
)
Will Stuart wil_t_helianthoides_304
May Richmond County NC
North Carolina Sandhills Gamelands
Upper stem leaves sessile, the lower on short winged stalks; margins toothed, per Wildflowers of the Sandhills Region (Sorrie, 2011).
)
Will Stuart wil_t_helianthoides_045
July Richmond County NC
North Carolina Sandhills Gamelands
Pollinator at work.
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Tetragonotheca helianthoides
FAMILY
Asteraceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Tetragonotheca helianthoides
FAMILY
Asteraceae
SYNONYMOUS WITH
Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Tetragonotheca helianthoides
SYNONYMOUS WITH
Flora of North America
Tetragonotheca helianthoides
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-60-001:
Tetragonotheca helianthoides
FAMILY
Asteraceae
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933, 1938)
Tetragonotheca helianthoides
2739
Forb
Perennial
Habitat: Longleaf pine sandhills, sandy woodlands, open hammocks, roadsides, per Weakley's Flora
Native to the Carolinas & Georgia
Common in Coastal Plain of GA & SC, common in GA Piedmont, uncommon in SC Piedmont (rare elsewhere in GA-NC-SC)
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
Opposite
Upper stem leaves sessile, lower stem leaves on short winged petioles
Margins toothed
FLOWER:
Spring/Summer
Rays: Yellow
Disc: Yellow
4 outer foliaceous phyllaries form a quadrangle hiding small narrow inner ones
Flower heads with 6-14 ray flowers
Inferior ovary
Flower heads solitary and terminal
FRUIT:
Spring/Summer
Achene
TO LEARN MORE about this plant, look it up in a good book!
- Atlantic Coastal Plain Wildflowers (Nelson, 2006) p182
- Guide to the Wildflowers of SC (Porcher & Rayner, 2001) p235
- Wildflowers of the Atlantic Southeast (Cotterman, Waitt, & Weakley, 2019) p300
- Wildflowers of the Eastern United States (Duncan & Duncan, 1999) p121
- Field Guide to the Wildflowers of Georgia (Chafin, 2016) p123
- Wildflowers of the Southern Mountains (Smith, 1998) p193
- Wildflowers of the Sandhills Region (Sorrie, 2011) p058