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 north of Mexico, vol. 19-20-21 (2006)
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 north of Mexico, vol. 19-20-21
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, calcareous glades, alluvial sand barren grasslands, 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.
LEAVES:
Simple
Mostly 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, 1st ed. (Porcher & Rayner, 2001) p235
- Guide to the Wildflowers of SC, 2nd ed. (McMillan, Porcher, Rayner, & White; 2022) p297
- 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
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