Conyza bonariensis (L.) Cronquist
  • Bulletin of the Torrey Botanical Club 70 1943
  • Saeppola di Buenos Aires


Cite taxon page as 'WFO (2022): Conyza bonariensis (L.) Cronquist. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000043751. Accessed on: 07 Dec 2022'

General Information

Plants erect, 10–100(–150+) cm, branched mostly distally. Leaves: faces ± densely strigose or hispidulous; proximal blades oblanceolate, 30–80(–120+) × 10–25+ mm, obscurely lobed to coarsely toothed or entire; distal narrowly oblanceolate to linear, 10–50 × 2–10 mm, obscurely toothed or entire. Heads usually in paniculiform to racemiform, rarely corymbiform arrays. Involucres 3.5–5 mm. Phyllaries usually strigose or hispidulous; outer greenish to purplish, lanceolate, shorter; inner stramineous to purplish, linear-attenuate (more chartaceous to scarious, less hairy). Receptacles 3–5 mm diam. in fruit. Pistillate florets 60–150+; corollas ± equaling or surpassing styles, laminae 0 or to 0.3 mm. Disc florets 8–12+. Cypselae pale tan, 1–1.5 mm, faces glabrous or sparsely strigillose; pappi of 15–25+, pinkish, sordid, or tawny bristles 3–4+ mm. 2n = 54.

  • Provided by: [J].Flora of North America @ efloras.org
    • Source: [
    • 10
    • ]. 

    Ampliamente distribuida; conocida en mesoamérica en Guatamala y Costa Rica a 1200–1500 m de altura.


  • Provided by: [K].Flora de Nicaragua
    • Source: [
    • 11
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    Coarse erect, sparingly branched ephemeral herb to 1.5 m tall; stems reaching 5 mm thick at the base, striate, green, evenly puberulent or sometimes glabrescent. Lower (few) leaves near the base broadly spatulate and dentate; median leaves to 10 mm long becoming somewhat smaller upwards, oblanceolate, entire or sparingly toothed, the base narrowed, sometimes into a petiolelike region, thin, puberulent, the midvein prominent, the minor venation obscure above, drying fine reticulate beneath. Inflorescence a many-headed open terminal panicle, much branched with scattered lanceolate bracts ca. 10-15 mm long; pedicels slender, to 20 mm long. Heads small, disciform with many florets; involucral bracts imbricate in ca. 2 series, 4-6 mm long, herbaceous with broad hyaline apically erose margins, glabrous to pilose; receptacle flat or slightly convex, 2-2.5 mm across, muricate; outer florets numerous, white, capillary, 3-4.5 mm long, apically denticulate, usually without a distinct ligule; inner florets few, yellow, clearly differentiated about halfway up into a slender, cylindrical limb, sparingly pubescent towards the top, the lobes deltoid-acuminate, glandular papillose at the tips, the anthers ca. 0.75 mm long, basally auriculate, apically with narrow appendages, the style branches broadly flattened with deltoid appendages, conspicuously glandular- pilose dorsally. Achene compressed, the margins slightly thickened by two prominent veins, pubescent, especially towards the base; pappus of fine strigulose bristles in 1 series, ca. 1.5 mm long.

  • Provided by: [G].Flora de Panama
    • Source: [
    • 12
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    Annual pubescent herb 1-2 m tall; stems simple or branching in the inflorescence. Leaves cauline, numerous, tapering to a petiole-like base; blades 4-15 x 0.2-2 cm, oblanceolate to linearlanceolate, gradually reduced above, chartaceous, indistinctly 3- nerved from well above base, pubescent on both surfaces, eglandular, the margins entire or nearly so to less commonly deeply serrate. Inflorescence an open bracteate pyramidal panicle in the upper half of the plant. Heads to 200- or more flowered, to 6-7 mm tall and broad; involucre hemispheric, 4-6 mm tall, 2-3- seriate; involucral bracts narrowly lanceolate, 2.2-6 x 0.5-0.7 mm, hispid, eventually completely reflexed; receptacle flat to subconvex, to ca. 2 mm broad; peduncles 3-20 mm long, hispid, bracteolate. Outer flowers with corollas weakly zygomorphic, 3.5- 4.5 mm long, tubular, white or purplish at top, topped by a 0.3- 0.6 mm long inconspicuous limb. Inner flowers ca. 7-20(-30), filiform-cylindrical, ca. 3.5-4.5 mm long, shortly 5-lobed, yellowish. Achenes elliptic-oblong, 1.5-1.8 mm long, weakly puberulent; pappus of many bristles, 3-4 mm long.

  • Provided by: [I].Memoirs of the New York Botanical Garden
    • Source: [
    • 13
    • ]. 

    Annual, 1–10+ dm, copiously and loosely hairy, habitally like no. 1 [Conyza canadensis (L.) Cronquist], or often with some of the lateral branches elongate and overtopping the central axis; lower lvs in robust plants sometimes to 15 × 2 cm; heads larger than in no. 1, the disk often over 1 cm wide; invol 4–6 mm, copiously short-hairy; pistillate fls (50–)70–200+, with a very short or scarcely developed ray to 0.5 mm, this generally surpassed by the style and equaling to more often surpassed by the often tawny or reddish pappus; 2n=54. A weed in waste places, widespread in trop. Amer. and occasionally intr. in se. U.S., n. to Va. Summer. (C. floribunda; Erigeron b.; Leptilon b.)

  • Provided by: [F].Manual of Vascular Plants of Northeastern US and Canada
    • Source: [
    • 15
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    Morphology

    Caule: ciclo anual; indumento estrigoso(s). Folha: folha(s) inferior(es) linear(es); margem(ns) das folha(s) inferior(es) serrada(s)/lobada(s)/inteira; base da folha(s) atenuada(s); folha(s) superior(es) linear(es); margem(ns) das folha(s) superior(es) inteira. Inflorescência: capitulescência(s) racemiforme(s)/paniculiforme(s); densidade(s) laxa(s) longa(s) e estreita(s); invólucro(s) do capítulo(s) hemisférico(s); ramosa(s) florífero(s) folhoso(s). Flor: ápice(s) da corola das flor(es) marginada(s) rudimentar(es); cor das flor(es) marginal(ais) alva/creme. Fruto: indumento serícea(s).

  • Provided by: [D].Brazilian Flora 2020 project - Projeto Flora do Brasil 2020
    • Source: [
    • 1
    • ]. 

    Tallo: ciclo anual; indumento estrigoso(s). Hoja: hoja(s) inferior(es) linear(es); margen(es) de las hoja(s) inferior(es) serrada(s)/lobada(s)/entera; base de la hoja(s) atenuada(s); hoja(s) superior(es) linear(es); margen(es) de las hoja(s) superior(es) entera. Inflorescencia: capitulescéncia(s) racemiforme(s)/paniculiforme(s); densidad(s) laxa(s) larga(s) y angosta(s); invólucro(s) del capítulo(s) hemisférico(s); ramosa(s) florífero(s) frondoso(s). Flor: ápice(s) de la corola de las flor(es) marginada(s) rudimentar(es); color de las flor(es) marginal(ais) blanco/crema. Fruto: indumento sericea(s).

  • Provided by: [D].Brazilian Flora 2020 project - Projeto Flora do Brasil 2020
    • Source: [
    • 1
    • ]. 

    Stem: cycle annual; indumentum strigose. Leaf: leaf lower linear; margin of the leaf lower serrate/lobate/entire; base of the leaf attenuate; leaf upper linear; margin of the leaf upper entire. Inflorescence: capitulescence racemiform/paniculiform; density lax long and angustate; involucre of the capitulum hemispheric; ramose floriferous leafy. Flower: apex of the corolla of the flower marginate rudimentary; colour of the flower marginal white/cream. Fruit: indumentum sericeous.

  • Provided by: [D].Brazilian Flora 2020 project - Projeto Flora do Brasil 2020
    • Source: [
    • 1
    • ]. 

    Leaves pale grey-green, sessile, linear to narrowly lanceolate or rarely pinnatilobed, 2.5–15 cm long, 0.2–3 cm wide, base cuneate, margins entire or dentate, apex acute, scabrid-pubescent on both surfaces and particularly on the veins and margins, the upper leaves or inflorescence bracts also glandular.

  • Provided by: [C].Plants Of the World Online Portal - FTEA
    • Source: [
    • 9
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    Annual herb 0.4–1.5(–2) m high; stems erect, simple or branched, cylindrical, striate, densely pubescent to scabrid.

  • Provided by: [C].Plants Of the World Online Portal - FTEA
    • Source: [
    • 9
    • ]. 

    Marginal florets whitish or cream with pink to purple tips, 60 to several hundred, tube 2.5–3.3 mm long and glabrous or slightly pilose, ray erect and 0.4–0.6 mm long and 2–3-toothed at apex, style 3.4–4.2 mm long; central florets white to yellow, 4–17, tube 2.8–3.5 mm long, lobes 0.3–0.7 mm long; anthers 0.7–1.1 mm long with narrowly triangular to filiform appendage; style 3.3–4.4 mm long with short, slightly swollen, papillose branches.

  • Provided by: [C].Plants Of the World Online Portal - FTEA
    • Source: [
    • 9
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    Capitula 4–8 mm long, grouped in terminal lax leafy panicles of 10 or more cymes of several laxly arranged capitula; stalks of individual capitula 0.2–3 cm long, scabrid-pubescent; phyllaries pale green, occasionally with red or purple apex, 2–3-seriate, ± 40, 1.5–5.6 mm long, 0.2–0.5 mm wide, with or without hyaline margins, pubescent; receptacle flat or slightly convex, not or slightly toothed.

  • Provided by: [C].Plants Of the World Online Portal - FTEA
    • Source: [
    • 9
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    Fig. 105 (page 507).

  • Provided by: [C].Plants Of the World Online Portal - FTEA
    • Source: [
    • 9
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    Achenes oblong-cylindrical, flattened or not, 1–2 mm long, 2-ribbed, pilose to pubescent; pappus of many white to pale yellow setae 2.5–5 mm long.

  • Provided by: [C].Plants Of the World Online Portal - FTEA
    • Source: [
    • 9
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    20–60 cm hoch, dicht anliegend und abstehend behaart. Blätter graugrün, gelegentlich gewellt, lineal-lanzettlich, einnervig, obere lineal. Zentrale Blütenrispe verkürzt, von den langen Seitenästen teilweise überragt. Hülle rauhaarig, 3–5 mm

  • Provided by: [E].Flora Helvetica – Illustrierte Flora der Schweiz
    • Source: [
    • 14
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    Herbe annuelle, atteignant 1.3 In de haut; tiges dressées, simples ou ramifiées, cylindriques, côtelées, ± densément pubescentes. Feuilles alternes, sessiles, oblongues-lancéolées surtout dans la partie inférieure de la tige, devenant linéaires ou même filiformes plus haut, de 2.5-15.0 cm de long et 0.2-3.0 cm de large, rétrécies vers la base, aiguës au sommet, entières ou les inférieures serrées-dentées, rarement pennatilobées, pubescentes-strigueuses sur les 2 faces; nervation pennée, proéminente en dessous. Capitules hétérogames, hémisphériques, d'environ 6 mm de diamètre, groupés en racèmes ou plus souvent en panicules terminales lâches ou ± denses, à ramifications latérales égalant ou dépassant l'axe principal; pédoncules rigides, de 0.5-1.5 cm de long, pubescents-strigueux; bractées linéaires-subulées, de 3-5 mm de long, pubescentes-glandulaires. Bractées involucrales 2-3-sériées, linéaires-lancéolées, d'environ 5 mm de long, acuminées au sommet, pubescentes sur le dos, ± étroitement membraneuses sur le bord. Réceptacle plan, épaléacé, muriqué. Fleurs périphériques femelles, plurisériées; corolle tubulairefihforme, d'environ 4.2 mm de long, blanchâtre, glabre, à ligule très petite. Fleurs centrales hermaphrodites, peu nombreuses, blanchâtres; corolle tubulaire, très légèrement s'élargissant dans la partie supérieure, de 3.8-4.0 mm de long, 5-dentée au sommet, glabre. Akènes oblongs-cylindriques, de 1-2 mm de long, 2-côtelés, poilus; pappus sétacé, copieux, d'environ 4 mm de long, blanchâtre ou légèrement rosâtre; soies finement barbelées.

  • Provided by: [H].Flore d'Afrique Centrale
    • Source: [
    • 16
    • ]. 

    Habit

    herb

  • Provided by: [G].Flora de Panama
    • Source: [
    • 12
    • ]. 

    Ecology

    7–10. Ruderalstellen, Felder, Brachen, kollin. CH.

  • Provided by: [E].Flora Helvetica – Illustrierte Flora der Schweiz
    • Source: [
    • 14
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    Habitat

    Endroits rudéraux, cultures, jachères.

  • Provided by: [H].Flore d'Afrique Centrale
    • Source: [
    • 16
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    Distribution

    nearly cosmopolitan in distribution

  • Provided by: [G].Flora de Panama
    • Source: [
    • 12
    • ]. 

    An occasional weed of open disturbed areas such as roadsides. Along road to Bordeaux (A2882, A3135), Susannaberg (A852). Also on St. Thomas and Tortola; throughout much of the West Indies, neotropics, and warmer parts of nontropical America. Introduced into the paleotropics.

  • Provided by: [I].Memoirs of the New York Botanical Garden
    • Source: [
    • 13
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    Côte d'Ivoire, Ghana, Fernando Po, Zambie, Zaïre, Rwanda, Malawi, Mozambique, Zimbabwe, Botswana, Rép. sudafricaine, Madagascar; plante subcosmopolite d'origine de l'Amérique tropicale.

  • Provided by: [H].Flore d'Afrique Centrale
    • Source: [
    • 16
    • ]. 

    Distribution Map

     
    • Native distribution
    Found in
    • Southern America Brazil Acre
    • Amapí
    • Amazonas
    • Parí
    • Rondônia
    • Roraima
    • Tocantins
    • Alagoas
    • Bahia
    • Ceará
    • Maranh
    • Paraába
    • Pernambuco
    • Piauá
    • Rio Grande do Norte
    • Sergipe
    • Paraní
    • Rio Grande do Sul
    • Santa Catarina
    • Espirito Santo
    • Minas Gerais
    • Rio de Janeiro
    • São Paulo
    • Brazilia Distrito Federal
    • Goiás
    • Mato Grosso
    • Mato Grosso do Sul

    Other Local Names

    NameLanguageCountry
    Saeppola di Buenos AiresItalianCH
    Tabaquillo
    Vergerette de Buenos AiresFrenchCH
    Südamerikanisches BerufkrautGermanCH

      Bibliography

     Information From

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    http://worldfloraonline.org/organisation/Asteraceae
    Asteraceae. The daisy family. World Flora Online Data. 2022.
    • A CC0 1.0 Universal (CC0 1.0).
    MBG Floras Images
    http://www.tropicos.org/ImageSearch.aspx
    Flora images. Missouri Botanical Garden. Accessed on Jun. 2018.
    • B Missouri Botanical Garden
    Plants Of the World Online Portal - FTEA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
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    Brazilian Flora 2020 project - Projeto Flora do Brasil 2020
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    • E All Rights Reserved
    Manual of Vascular Plants of Northeastern US and Canada
    https://www.nybg.org/
    Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
    • F Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    Flora de Panama
    http://www.tropicos.org/Project/PAC
    Robert E. Woodson, Jr. and Robert W. Schery Annals of the Missouri Botanical Garden Vol. 67, No. 4 (1980), pp. ii-xxxiii
    • G Missouri Botanical Garden
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    https://www.floredafriquecentrale.be
    • H http://creativecommons.org/licenses/by/4.0/ Attribution 4.0 International (CC BY 4.0)
    Memoirs of the New York Botanical Garden
    https://www.nybg.org/
    Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
    • I Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    Flora of North America @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=1
    'Flora of North America @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=1 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • J Flora of North America Association
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    http://www.tropicos.org/projectwebportal.aspx?projectid=7&pagename=Home&langid=66
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    • K Missouri Botanical Garden