Tetragonotheca helianthoides Linnaeus. Common name: Squarehead, Pineland-ginseng. Phenology: Apr-Jul. Habitat: Longleaf pine sandhills, sandy woodlands, open hammocks, calcareous glades, alluvial sand barren grasslands, roadsides. Distribution: Se. VA and e. TN south to c. peninsular FL and s. MS.
Origin/Endemic status: Endemic
Synonymy ⓘ: = C, F, Fl7, FNA21, G, K4, RAB, S, SE1, Tn, Va, W, WH3, Turner & Dawson (1980). Basionym: Tetragonotheca helianthoides L. 1753
Links to other floras: = Tetragonotheca helianthoides - FNA21
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Heliophily ⓘ: 7
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© Scott Ward | Original Image ⭷
© Will Stuart | Original Image ⭷
© Alan Cressler: Tetragonotheca helianthoides, Kathy Stiles Freeland Bibb County Glades Preserve, The Nature Conservancy, Bibb County, Alabama 1 by Alan Cressler source | Original Image ⭷
© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
© Scott Ward, some rights reserved (CC BY), uploaded by Scott Ward source CC-BY | Original Image ⭷
© Alan Cressler: Tetragonotheca helianthoides, along River Road, Johnson County, Georgia 2 by Alan Cressler source | Original Image ⭷
© Floyd A. Griffith | Original Image ⭷
© Scott Ward | Original Image ⭷Feedback
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Horticultural Information
Intro: Erect-ascending, tufted perennial of sandhills, sandy woodlands such as longleaf pinelands, open hammocks and roadsides.
Stems: Stems 1-a few, sparsely branched, hairy.
Leaves: Leaves opposite, sessile with winged bases (lower leaves may be petiolate), elliptic to oval or diamond-shaped, 4-7 in. long, toothed.
Inforescence:
Flowers: Composite flowers (heads) solitary at stem tips; each head consisting of 6-10 well-separated yellow ray florets encircling a flattish central disk of darker yellow, tubular florets. Each head rests on 4 large, oval bracts that collectively suggest a square.
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Height: 1-3 ft.
plant sale text:
bloom table text:
description: Erect-ascending, tufted perennial of sandhills, sandy woodlands such as longleaf pinelands, open hammocks and roadsides.
stems: Stems 1-a few, sparsely branched, hairy.
leaves: Leaves opposite, sessile with winged bases (lower leaves may be petiolate), elliptic to oval or diamond-shaped, 4-7 in. long, toothed.
inflorescence:
flowers: Composite flowers (heads) solitary at stem tips; each head consisting of 6-10 well-separated yellow ray florets encircling a flattish central disk of darker yellow, tubular florets. Each head rests on 4 large, oval bracts that collectively suggest a square.
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