*Bidens pilosa Linnaeus. Habitat: Disturbed areas, ballast, waste areas near wool-combing mill. Distribution: Native of tropical America. Reported for NC (Kartesz 1999), perhaps based on confusion with B. alba; known from ballast in se. PA (Rhoads & Klein 1993).
Origin/Endemic status: Neotropics
Synonymy ⓘ: = Fl7, NE, WH3; = n/a — C, F, Pa, Tat; < Bidens pilosa L. — FNA21, K4, RAB, Lizarazu et al (2024); > Bidens pilosa L. var. bimucronata (Turczaninov) Sch.-Bip. — Sherff & Alexander (1955); > Bidens pilosa L. var. pilosa — Sherff & Alexander (1955); Bidens pilosa L. Basionym: Bidens pilosa L. 1753
Links to other floras: < Bidens pilosa - FNA21
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Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: FAC (taxonomic split from wetland indicator species)
- Eastern Mountains and Piedmont: FACW (taxonomic split from wetland indicator species)
- Great Plains: FACW (taxonomic split from wetland indicator species)
- Midwest: FACW (taxonomic split from wetland indicator species)
- Northcentral & Northeast: FACW (taxonomic split from wetland indicator species)
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© John Gwaltney | Original Image ⭷
© John Gwaltney | Original Image ⭷
© John Gwaltney | Original Image ⭷
© John Gwaltney | Original Image ⭷
© John Gwaltney | Original Image ⭷
© John Gwaltney | Original Image ⭷
© John Gwaltney | Original Image ⭷
© John Gwaltney | Original Image ⭷Feedback
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Horticultural Information
Intro: Erect, or reclining with the tip ascending, annual/short-lived perennial of wet disturbed areas. Native of tropical America and weedy and invasive worldwide.
Stems: Stems grooved, branched, often rooting at lower nodes, smooth or with short soft hairs in the upper part.
Leaves: Leaves opposite, petiolate, mostly pinnately divided into 3-7, lance-shaped to oval, sharply toothed lobes; with soft, short hairs on both surfaces.
Inforescence:
Flowers: Composite flowers (heads) usually solitary or in open, terminal cluster; heads about 1/2 in. wide, consisting of 5-8 white, broadly elliptic, toothed ray florets (may be absent) encircling a central disk of yellowish, tubular florets; 2 series of bracts surround the bell-shaped base of each head.
Fruits: Fruit a slightly curved, 4-angled black achene, tapered at both ends and usually with 2-3 barbed awns.
Comments:
Height: 8-30 in. (may be much taller)
plant sale text:
bloom table text:
description: Erect, or reclining with the tip ascending, annual/short-lived perennial of wet disturbed areas. Native of tropical America and weedy and invasive worldwide.
stems: Stems grooved, branched, often rooting at lower nodes, smooth or with short soft hairs in the upper part.
leaves: Leaves opposite, petiolate, mostly pinnately divided into 3-7, lance-shaped to oval, sharply toothed lobes; with soft, short hairs on both surfaces.
inflorescence:
flowers: Composite flowers (heads) usually solitary or in open, terminal cluster; heads about 1/2 in. wide, consisting of 5-8 white, broadly elliptic, toothed ray florets (may be absent) encircling a central disk of yellowish, tubular florets; 2 series of bracts surround the bell-shaped base of each head.
fruits: Fruit a slightly curved, 4-angled black achene, tapered at both ends and usually with 2-3 barbed awns.
comments:
cultural notes:
germination code:
native range:
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