Sonchus arvensis L.
  • Sp. Pl.
  • Bleachtán léana

Cite taxon page as 'WFO (2021): Sonchus arvensis L. Published on the Internet; Accessed on: 06 Mar 2021'

General Information

"Perennial, 4–20 dm, with long vertical roots and spreading by creeping roots, glabrous at least below the infl and often somewhat glaucous; lvs prickly-margined, the lower and middle ones usually pinnately lobed or pinnatifid, 6–40 × 2–15 cm, becoming less lobed and more auriculate upward, the upper reduced and distant; heads several in an open-corymbiform infl, relatively large, 3–5 cm wide in fl; fls ca 150–235 per head; fruiting invol 14–22 mm; achenes 2.5–3.5 mm, with 5+ prominent ribs on each face, strongly rugulose; 2n=36, 54. A European weed, now widely intr. in temperate N. Am. July–Oct. Var. arvensis is ± copiously provided with coarse, spreading, gland-tipped hairs on the invol and peduncles. Var. glabrescens (Günther) Grab. & Wimm. lacks these hairs. (S. uliginosus)"

  • Provided by: [C].New York Botanical Garden
    • Source: [
    • 1
    • ]. 


    60–150(–200) cm hoch, oben oft verzweigt. Stängel hohl, unten kahl, oben kahl oder gelblich-drüsig behaart. Blätter kahl, unterseits blasser grün, buchtig fiederteilig, fein stachelig gezähnt, mit breiten, gerundeten Zipfeln umfassend. Köpfe 4–6 cm

  • Provided by: [B].Flora Helvetica – Illustrierte Flora der Schweiz
    • Source: [
    • 2
    • ]. 

    Distribution Map

    • Native distribution
    Found in
    • Europe Northern Europe Ireland

    Nationally Preferred Names

    Bleachtán léanaIrishIE
    Perennial sow-thistleEnglishIE

    Other Local Names

    Grespino dei campiItalianCH
    Milk thrisselEnglishIE
    Milk thistleEnglishIE
    Latitschun d'erRaeto-RomanceCH
    Melsh weedEnglishIE
    Milk weedEnglishIE
    Laiteron des champsFrenchCH
    Corn sow-thistleEnglishIE


    • 1 "Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp."
    • 2 Flora Helvetica, Illustrierte Flora der Schweiz. K. Lauber, G. Wagner, A. Gygax, Haupt Verlag, 2018. ISBN-978-3-258-08047-5
    • 3 Sp. Pl.

     Information From

    CC0 1.0 Universal (CC0 1.0).
    • A CC0 1.0 Universal (CC0 1.0).
    Flora Helvetica – Illustrierte Flora der Schweiz
    Flora Helvetica – Illustrierte Flora der Schweiz, Konrad Lauber, Gerhart Wagner, Andreas Gygax. Haupt Verlag 2018.
    • B All Rights Reserved
    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.
    • C Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    Irish Vernacular Names
    • D All Rights Reserved
    World Flora Online consortium
    World Flora Online Data. 2018.
    • E CC0 1.0 Universal (CC0 1.0).