View source for Bidens pilosa

{{Treatment/ID
|accepted_name=Bidens pilosa
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=2: 832. 1753
|year=1753
}}
|common_names=Bident poilu
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Bidens alba
|authority=(Linnaeus) de Candolle
}} {{Treatment/ID/Synonym
|name=Bidens alba var. radiata
|authority=(Schultz-Bipontinus) R. E. Ballard
}} {{Treatment/ID/Synonym
|name=Bidens odorata
|authority=unknown
}} {{Treatment/ID/Synonym
|name=Bidens pilosa var. radiata
|authority=(Schultz-Bipontinus) Schultz-Bipontinus
}}
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Coreopsidinae;Bidens;Bidens pilosa
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Heliantheae]]</div><div class="higher-taxon"><small>subtribe</small>[[Asteraceae (tribe Heliantheae) subtribe Coreopsidinae]]</div><div class="higher-taxon"><small>genus</small>[[Bidens]]</div><div class="higher-taxon"><small>species</small>[[Bidens pilosa]]</div></div>
|volume=Volume 21
|mention_page=page 207
|treatment_page=page 211
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals </b>[perennials], (10–)30–60(–180+)[–250] cm. <b>Leaves</b>: petioles 10–30(–70) mm; blades either ovate to lanceolate, 30–70(–120) × 12–18(–45) mm, or 1-pinnately lobed, primary lobes 3–7, ovate to lanceolate [linear], (10–)25–80+ × (5–)10–40+ mm [blades 2(–3)-pinnatisect], bases truncate to cuneate, ultimate margins serrate or entire, usually ciliate, apices acute to attenuate, faces pilosulous to sparsely hirtellous or glabrate. <b>Heads</b> usually borne singly, sometimes in open, ± corymbiform arrays. <b>Peduncles</b> 10–20(–90) mm. <b>Calyculi</b> (6–)7–9(–13) ± appressed, spatulate to linear bractlets (3–)4–5 mm, margins ciliate, abaxial faces usually hispidulous to puberulent. <b>Involucres</b> turbinate to campanulate, 5–6 × (6–)7–8 mm. <b>Phyllaries</b> (7–)8–9(–13), lanceolate to oblanceolate, 4–6 mm. <b>Ray</b> florets 0 or (3–)5–8+; laminae whitish to pinkish [yellowish], 2–3 or 7–15+ mm. <b>Disc</b> florets 20–40(–80+); corollas yellowish, (2–)3–5 mm. <b>Cypselae</b>: outer red-brown, ± flat, linear to narrowly cuneate, (3–)4–5+ mm, margins antrorsely hispidulous, apices ± truncate or somewhat attenuate, faces obscurely 2-grooved, sometimes tuberculate-hispidulous; inner blackish, ± equally 4-angled, linear-fusiform, 7–16 mm, margins antrorsely hispidulous, apices ± attenuate, faces 2-grooved, tuberculate-hispidulous to sparsely strigillose; pappi 0, or of 2–3(–5), erect to divergent, retrorsely barbed awns (0.5–)2–4 mm. <b>2n</b> = 24, 36, 48, 72.</span><!--

-->{{Treatment/Body
|phenology=Flowering year round.
|habitat=Disturbed, wettish sites
|elevation=10–1900 m
|distribution=Ont. Que.;Ala.;Ariz.;Calif.;Conn.;Fla.;Ga.;Ky.;La.;Md.;Mass.;Miss.;Mo.;N.Mex.;N.C.;Pa.;S.C.;Tex.;Mexico;Central America;Europe.
|discussion=<p>R. Ballard (1986) adopted a narrower circumscription of <i>Bidens pilosa</i> than that used here. He used: <i>B. pilosa</i> for plants with outer phyllaries 7–10, ray florets usually 0 (when present, laminae 2–3 mm), disc florets 35–75, pappi of 3(–5) awns 1–3 mm, and 2n = 72; <i>B. alba</i> for plants with outer phyllaries (8–)12(–16), ray florets 5–8 (laminae 5–16 mm), pappi of 2 awns 1–2 mm, and 2n = 48; and B. odorata for plants with outer phyllaries (6–)8(–12), ray florets 5–8 (laminae 3–18 mm), disc florets 12–61, pappi 0, or of 1–2 awns 1–3 mm, and 2n = 24.</p>
|tables=
|references={{Treatment/Reference
|id=ballard1986a
|text=Ballard, R. 1986. Bidens pilosa complex (Asteraceae) in North and Central America. Amer. J. Bot. 73: 1452–1465.
}}
}}<!--

--><!--

-->{{#Taxon:
name=Bidens pilosa
|author=
|authority=Linnaeus
|rank=species
|parent rank=genus
|synonyms=Bidens alba;Bidens alba var. radiata;Bidens odorata;Bidens pilosa var. radiata
|basionyms=
|family=Asteraceae
|phenology=Flowering year round.
|habitat=Disturbed, wettish sites
|elevation=10–1900 m
|distribution=Ont. Que.;Ala.;Ariz.;Calif.;Conn.;Fla.;Ga.;Ky.;La.;Md.;Mass.;Miss.;Mo.;N.Mex.;N.C.;Pa.;S.C.;Tex.;Mexico;Central America;Europe.
|introduced=true
|reference=ballard1986a
|publication title=Sp. Pl.
|publication year=1753
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V21_513.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Coreopsidinae
|genus=Bidens
|species=Bidens pilosa
}}<!--

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