Cirsium 


Cite taxon page as 'WFO (2021): Cirsium . Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000008373. Accessed on: 26 Sep 2021'

General Information

"Heads discoid, the fls all tubular and perfect, or the plants sometimes dioecious by abortion; invol bracts imbricate, usually some or all of them spine- tipped, and in many spp. with a thickened, glutinous, dorsal ridge; receptacle flat to subconic, densely bristly; cors purple to yellowish or white, with slender tube and long, narrow lobes; filaments usually papillose-hairy; anthers with a firm, narrow, apical appendage, evidently tailed at the base; style with a thickened, hairy ring and an abrupt change of texture below the ± connate, papillate branches; achenes basifixed or nearly so, glabrous, firm, thick-compressed, often curved, nerveless, commonly with a cartilaginous, pale yellow collar; pappus of numerous plumose bristles, deciduous in a ring; spiny herbs with alternate, toothed to more often pinnatifid lvs and medium- sized to large heads. 200, N. Hemisphere. (Spp. all sometimes included in Carduus)"

  • Provided by: [E].New York Botanical Garden
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    Morphology

    Stems spiny-winged from decurrent leaf bases, rarely unarmed.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
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    Perennial or biennial (annual) herbs.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
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    Anther bases sagittate, the adjacent auricles connate and produced into entire or lacerate tails.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
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    Style 2-branched, with an abrupt swelling below the branches and a ring of hairs at or below the swelling; the branches erect, long somewhat flat and ± connate, diverging only near the tips.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
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    Achenes ± oblong, compressed smooth, glabrous with a raised annular collar at the apex, attachment-scar sub-basal oblique or ± horizontal.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
    • 6
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    Pappus many-seriate; setae plumose, connate into a ring at the base, deciduous (± persistent), longest in the innermost series.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
    • 6
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    Capitula homogamous, discoid, loosely aggregated (or large solitary and terminal) on the branches.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
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    Phyllaries numerous many-seriate imbricate appressed, ± patent apically and usually spine-tipped, with or without subterminal vitta, margins entire to spinulose or lacerate.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
    • 6
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    Receptacle flat or convex, densely long-setose.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
    • 6
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    Florets hermaphrodite (rarely unisexual); corollas white to purple (yellowish), narrowly tubular with a broad deeply 5-lobed limb.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
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    Leaves pinnatifid in the Flora Zambesiaca area (entire) with spine-tipped teeth at the margins.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
    • 6
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    Achenes with a raised annular collar; pappus many-seriate, of plumose bristles connate into a ring at the base.

  • Provided by: [C].Plants Of the World Online Portal - FTEA
    • Source: [
    • 7
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    Florets hermaphrodite, rarely unisexual, narrowly tubular with a broad, deeply 5-lobed limb; anthers with sagittate bases, the adjacent auricles connate, tailed; style with an abrupt swelling with a ring of hairs just below the branches, these flat and ± connate, diverging only distally

  • Provided by: [C].Plants Of the World Online Portal - FTEA
    • Source: [
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    Herbs with spiny wings on stems

  • Provided by: [C].Plants Of the World Online Portal - FTEA
    • Source: [
    • 7
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    Capitula homogamous, discoid; phyllaries many, in several series, imbricate, usually spine-tipped; receptacle densely setose

  • Provided by: [C].Plants Of the World Online Portal - FTEA
    • Source: [
    • 7
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    Leaves alternate, pinnatifid (in ours), with spine-tipped teeth

  • Provided by: [C].Plants Of the World Online Portal - FTEA
    • Source: [
    • 7
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    Herbes'annuelles ou vivaces, à tiges souvent ailées.'Feuilles'alternes, souvent décurrentes à la base, serrées-dentées ou pennatilobées à pennatifides, à dents ou segments épineux ou plus rarement rigidement ciliées.'Capitules'homogames, pluri- à multiflores, solitaires ou groupés en glomérules compactes ou en cymes ± lâches, paniculiformes, terminant les tiges et leurs ramifications. Involucre plurisérié, ovoïde à globuleux; bractées involucrales imbriquées, les externes plus courtes que les internes, entières, ciliées, parfois ± laciniées, souvent épineuses, les internes parfois colorées. Réceptacle plan, convexe ou subconique, densément couvert de soies.'Fleurs'toutes hermaphrodites, tubuleuses; corolle glabre, longuement cylindrique, légèrement dilatée dans la partie supérieure et profondément 5-lobée. Anthères linéaires, sagittées à la base et munies d'un appendice lancéolé; filets ± papilleux-poilus. Style cylindrique, courtement à assez longuement bifide, à branches courtes et élargies ou linéaires, souvent munies d'un anneau de poils à la base.'Akènes obovales à oblongs, glabres; pappus sétacé, plurisérié, aussi long que la corolle; soies plumeuses, connées entre elles par leur base.\n\t\t\t\tLectotype: Cirsium heterophyllum (L.) J.Hill.\n\t\t\t\tOn a décrit plus de 200 espèces de ce genre, mais actuellement ce nombre est réduit à environ 120 espèces, réparties en Eurasie, en Afrique du Nord et en Amérique septentrionale et centrale. Quelques espèces sont naturalisées en Afrique du Sud. En Afrique tropicale on a constaté 5 espèces et seulement dans les régions orientales (surtout en Ethiopie). Une de ces espèces pénètre de l'est dans la flore d'Afrique centrale.

  • Provided by: [B].Flore d'Afrique Centrale
    • Source: [
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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).
    Flore d'Afrique Centrale
    https://www.floredafriquecentrale.be
    • B http://creativecommons.org/licenses/by/4.0/ Attribution 4.0 International (CC BY 4.0)
    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
    • C
    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
    • D
    New York Botanical Garden
    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.
    • E Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • F CC0 1.0 Universal (CC0 1.0).