Cirsium arvense (L.) Scop.
  • Flora Carniolica 2 (1772)


Cite taxon page as 'WFO (2020): Cirsium arvense (L.) Scop. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000006870. Accessed on: 30 Mar 2020'

General Information

Herbs 30-160 cm tall, perennial, dioecious. Roots far creeping, bearing adventitious shoots. Stems erect, branched above, unwinged. Leaf surface smooth. Capitula often numerous, terminal, corymbose. Involucre ± narrowly ovoid, 1.5-2 cm in diam. Phyllaries imbricate, in 5-7 rows, lacking wings and scarious appendage; outer and middle phyllaries triangular to ovate, 3-8 × 1.2-2.5 mm, apex acute; inner phyllaries elliptic-lanceolate to broadly linear, 9-20 × 1-3 mm, apex acute to acuminate and scarious. Corolla reddish purple or rarely white; female florets 1.6-2.4 cm, tube 1.3-1.8 cm; male florets 1.5-1.8 cm, tube 0.9-1.2 cm. Achene yellowish, 3-4.5 mm. Pappus bristles dirty white, 2.5-3.5 cm.

  • Provided by: [E].Flora Of CHina @ efloras.org
    • Source: [
    • 1
    • ]. 

    Perennials, dioecious or nearly so, 30–120(–200) cm; colonial from deep-seated creeping roots producing adventitious buds. Stems 1–many, erect, glabrous to appressed gray-tomentose; branches 0–many, ascending. Leaves: blades oblong to elliptic, 3–30 × 1–6 cm, margins plane to revolute, entire and spinulose, dentate, or shallowly to deeply pinnatifid, lobes well separated, lance-oblong to triangular-ovate, spinulose to few-toothed or few-lobed near base, main spines 1–7 mm, abaxial faces glabrous to densely gray-tomentose, adaxial green, glabrous to thinly tomentose; basal absent at flowering, petioles narrowly winged, bases tapered; principal larger cauline proximally winged-petiolate, distally sessile, well distributed, gradually reduced, not decurrent; distal cauline becoming bractlike, entire, toothed, or lobed, spinulose or not. Heads 1–many, borne singly or in corymbiform or paniculiform arrays at tips of main stem and branches. Peduncles 0.2–7 cm. Involucres ovoid in flower, ± campanulate in fruit, 1–2 × 1–2 cm, arachnoid tomentose, ± glabrate. Phyllaries in 6–8 series, strongly imbricate, (usually purple-tinged), ovate (outer) to linear (inner), abaxial faces with narrow glutinous ridge, outer and middle appressed, entire, apices ascending to spreading, spines 0–1 mm (fine); apices of inner phyllaries flat, ± flexuous, margins entire to minutely erose or ciliolate. Corollas purple (white or pink); staminate 12–18 mm, (remaining longer than pappus when head is fully mature), tubes 8–11 mm, throats 1–1.5 mm, lobes 3–5 mm; pistillate 14–20 mm, (overtopped by pappi in fruit), tubes 10–15 mm, throats ca. 1 mm, lobes 2–3 mm; style tips 1–2 mm. Cypselae brown, 2–4 mm, apical collar not differentiated; pappi 13–32 mm, exceeding corollas. 2n = 34.

  • Provided by: [C].Flora of North America @ efloras.org
    • Source: [
    • 2
    • ]. 

    "Colonial perennial 3–15(–20) dm from deep-seated creeping roots, subglabrous, or the lvs ± white-tomentose beneath; heads ± numerous in an often flat- topped infl, unisexual or nearly so, the plants polygamo-dioecious; invol 1–2 cm high, its bracts all innocuous, or the outer with a weak spine-tip ca 1 mm; fls pink-purple (white); achenes 2.5–4 mm; pappus of the pistillate heads surpassing the corollas, that of the staminate heads surpassed by the cors; 2n=34. A noxious weed of fields and waste places; native of Eurasia, now widely intr. in n. U.S. and s. Can. July, Aug. The var. arvense has merely toothed or shallowly lobed, weakly spiny lvs. (C. setosum; C. a. var. mite) The more common var. horridum Wimmer & Graebner has more spiny, deeply pinnatifid lvs."

  • Provided by: [D].New York Botanical Garden
    • Source: [
    • 3
    • ]. 

    Morphology

    Perennial herb, 0.3-0.9 m high, sometimes up to 1.5 m. Heads small, discoid; flowers dioecious. Leaves entire to deeply pinnately lobed, margins with long and short spines; sessile, clasping. Flowers purplish, occasionally white.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 5
    • ]. 

    Habitat

    Weed of cultivation and waste places.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 5
    • ]. 

    Distribution

    Native to Europe and Asia.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 5
    • ]. 

    Synonyms

      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).
    e-Flora of South Africa
    e-Flora of South Africa. v1.21. 2018. South African National Biodiversity Institute. http://ipt.sanbi.org.za/iptsanbi/resource?r=flora_descriptions&v=1.21
    • B All Rights Reserved
    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.
    • C Flora of North America Association
    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.
    • D Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    Flora Of CHina @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=2
    'Flora of China @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=2 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • E Missouri Botanical Garden
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • F CC0 1.0 Universal (CC0 1.0).