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[[File:Map Bidens pilosa.gif|thumb|distribution in Africa (wild)]]
[[File:Linedrawing Bidens pilosa.gif|thumb|1, flowering and fruiting plant; 2, flowering head; 3, ray floret; 4, disk floret; 5, achenes. Source: PROSEA]]
[[File:Bidens pilosa 01 RRS.jpg|thumb|]]
[[File:Bidens pilosa 25a RRS.jpg|thumb|]]
[[File:Bidens pilosa 25b RRS.jpg|thumb|]]
[[File:Bidens pilosa 56.221.jpg|thumb|]]
flowers
young plant
infructescence with hooked fruits
flowering plant
<big>''[[Bidens pilosa]]'' L.</big>
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{{DISPLAYTITLE:''Bidens pilosa'' (PROTA)}}
:Protologue: Sp. pl. 2: 832 (1753).
== Synonyms ==
*''Bidens leucantha'' (L.) Willd. (1803).
== Vernacular names ==
*Black jack, cobbler’s pegs, hairy beggarticks, Spanish needles (En). *Sornet, piquant noir, bident hérissé, herbe aiguille, herbe villebague (Fr). *Carrapicho de agulha, picão preto (Po). *Kichoma mguu, kichoma nguo (Sw).
== Origin and geographic distribution ==
== Description ==
*Annual, erect herb up to 100 cm tall, with slender, stiff and 4-angled stems and spreading branches. *Leaves decussately opposite, pinnately 3–5-foliolate, up to 15(–20) cm long, sometimes lower leaves simple, without stipules; leaflets with short petiolules, blade ovate to ovate-lanceolate, margins usually serrate or crenate-serrate, terminal leaflet larger than lateral leaflets. *Inflorescence an axillary or terminal head 6–12 mm in diameter, solitary or arranged in lax cymes; outer involucral bracts 7–10, spatulate, 3–4 mm long, reflexed at anthesis, inner ones ovate-lanceolate. *Ray flowers absent or 4–8, ligulate, sterile, corolla 7–15 mm long, white to yellow or pinkish; disk flowers tubular, bisexual, with 3.5–5 mm long, yellow corolla; stamens with fused anthers; ovary inferior, 1-celled, style bifid. *Fruit a linear achene 4–13 mm long, 4–6-ribbed, with 2–3(–5) retrorsely barbed bristles of 2–4 mm long. *Seedling with epigeal germination; hypocotyl elongated; cotyledons strap-shaped to spatulate.
== Other botanical information ==
== Author(s) ==
* B. Mvere , East West Seed International Ltd., P.O. Box BW 141, Borrowdale, Harare, Zimbabwe
== Correct citation of this article ==
Mvere, B., 2004. '''Bidens pilosa''' L. [Internet] Record from PROTA4U. Grubben, G.J.H. & Denton, O.A. (Editors). PROTA (Plant Resources of Tropical Africa / Ressources végétales de l’Afrique tropicale), Wageningen, Netherlands. <http://www.prota4u.org/search.asp>.
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[[Category:PROTA]]
[[Category:Vegetables (PROTA)]]