Launaea 


Cite taxon page as 'WFO (2020): Launaea . Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000020742. Accessed on: 05 Dec 2020'

Morphology

Annual perennial or biennial herbs (spiny subshrubs), glabrous, with or without stems, sometimes caespitose, occasionally stoloniferous.

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    Stems or flowering stalks 1-several, branching above or simple.

  • Provided by: [C].Plants Of the World Online Portal - FZ
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    Leaves cauline and alternate, or radical and rosulate, entire or sinuate-dentate to runcinate-pinnatipartite, often acicular-denticulate on the margins.

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    Capitula few to numerous, subsessile or shortly stalked, often in lax irregular corymbs, sometimes solitary, or in clusters along the branches.

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    Receptacle epaleate.

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    Pappus many-seriate, of setae only or of setae intermixed with numerous down-like hairs.

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    Florets few to many, yellow, or the ligule sometimes purplish or red outside; anthers sagittate at the base with the auricles shortly setaceous-acuminate; style branches long slender, sweeping hairs long.

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    Achenes pale-brown to black, subterete or somewhat angular, or compressed, sometimes apically attenuate or beaked, ribbed; ribs 5-many, uniformly narrow or somewhat inflated, smooth or muricate, glabrous.

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    Involucres narrowly cylindric-campanulate.

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    Phyllaries 2-several-seriate, becoming ± swollen and corky towards the base; the innermost subequal, usually greatly exceeding the outer.

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    Florets few to many; anthers sagittate; style branches with long sweeping hairs

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    Capitula subsessile or shortly stalked, in lax irregular corymbs, or in clusters along the branches; involucre cylindric becoming campanulate; phyllaries in few series, the outermost smallest, becoming swollen and corky, often with scarious margins; receptacle epaleate

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    Achenes cylindric or fusiform, sometimes beaked, ribbed, usually dimorphic with the outer darker and rugose, the inner pale and smooth; pappus of setae only, or of mixed setae and downy hairs.

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    Leaves in a rosette or cauline, entire to pinnatipartite

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    Herbs or spiny sub-shrubs, sometimes acaulescent, sometimes scapose; stems simple or branched, glabrous

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    Plantes'annuelles à vivaces, herbacées à sous-arbustives, dressées; tiges glabres et glauques.'Feuilles'alternes, caulinaires ou en rosette basilaire, dentées, parfois lobées, penninerves.'Inflorescence'paniculée, à capitules ± nombreux; pédoncules ± ramifiés, partant de la souche ou portés par des tiges feuillées; bractées inflorescentielles petites.'Capitules'pauci- à multiflores; involucre cylindrique, à 4-6 bractées externes ovales et à 5-10 bractées internes oblongues; réceptacle dépourvu de paillettes.'Fleurs'à corolle jaune pâle, glabre ou poilue à la jonction du tube et de la ligule; style à branches courtes et grêles, à poils collecteurs longs.'Akènes à corps prismatique à légèrement aplati, tronqué au sommet, à 8-15 côtes égales ou inégales, lisse ou rugueux, glabre ou pubérulent; pappus sessile, à soies non plumeuses, toutes semblables ou de deux sortes, ± blanches.\n\t\t\t\tGenre des zones intertropicale et subtropicales, de la région méditerranéenne, des Canaries, des Antilles, de l'Australie et de la Nouvelle-Zélande, groupant environ 80 espèces. Pour la Flore : 4 espèces, indigènes.

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    Included Species

      Bibliography

     Information From

    Compositae
    CC0 1.0 Universal (CC0 1.0). https://creativecommons.org/publicdomain/zero/1.0
    • A CC0 1.0 Universal (CC0 1.0).
    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
    • B
    Plants Of the World Online Portal - FZ
    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
    • C
    Flore d'Afrique Centrale
    https://www.floredafriquecentrale.be
    • D http://creativecommons.org/licenses/by/4.0/ Attribution 4.0 International (CC BY 4.0)
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • E CC0 1.0 Universal (CC0 1.0).
    International Union for Conservation of Nature
    https://www.iucn.org/
    IUCN 2016. IUCN Red List of Threatened Species. Version 2016-2
    • F All Rights Reserved
    International Union for Conservation of Nature v.3
    https://www.iucnredlist.org/
    IUCN 2019. The IUCN Red List of Threatened Species. Version 2019-1.
    • G See IUCN Terms and conditions of use http://www.iucnredlist.org/info/terms-of-use