Arctium lappa L.
  • Sp. Pl.


Cite taxon page as 'WFO (2020): Arctium lappa L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000095986. Accessed on: 24 Oct 2020'

General Information

Herbs to 2 m tall, biennial. Stem purplish, erect, stout, apically branched, sparsely cobwebby; branches ascending. Leaves abaxially grayish white or pale green and thinly felted, adaxially green, sparsely strigose, and yellow gland-dotted. Basal leaves with petiole ca. 32 cm; leaf blade broadly heart-shaped, ca. 30 × 21 cm, margin entire and repand to mucronulate denticulate. Cauline leaves similar to basal leaves or ovate; uppermost cauline leaves ovate to shallowly cordate, smaller. Capitula few to many, ± corymbose. Involucre ovoid, 1.5-2 cm in diam., glabrous except for minute glandular hairs. Phyllaries all with a hooked apex; outer phyllaries triangular to lanceolate-subulate, ca. 15 × 1 mm; middle and inner phyllaries lanceolate to linear-subulate, ca. 15 × 1.5-3 mm. Corolla purplish red, ca. 1.4 cm, tube ca. 8 mm. Achene pale brown variegated with dark brown or concolorous, narrowly sometimes obliquely obovoid, 5-7 mm, multistriate. Pappus bristles to 3.5 mm. Fl. and fr. Jun-Sep. 2n = 18, 34, 36.

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

    Plants to 100–300 cm. Basal leaves: petioles solid, 15–36 cm, glabrous or thinly cobwebby; blades 25–80 × 20–70 cm, coarsely dentate to subentire, abaxially thinly gray-tomentose, adaxially green, sparsely short-hairy to nearly glabrous. Heads usually in corymbiform clusters, long-pedunculate. Peduncles 2.5–6 cm. Involucres 25–45 mm diam. Phyllaries linear to linear-lanceolate, glabrous to loosely cobwebby, inner usually stramineous (sometimes purplish), margins with minute spreading or reflexed hairs. Florets 40+; corollas purple (occasionally white), 9–14 mm, glabrous. Cypselae light brown, often with darker spots, 6–7.5 mm; pappus bristles 2–5 mm. 2n = 32 (Japan), 34 (China), 36 (Japan); (Sweden).

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

    "To 1.5 or even 3 m; lvs petiolate, the petioles mostly solid, progressively shorter upwards, the blade ovate or broader, cordate, to 5 × 3 dm, thinly tomentose beneath, subglabrous above; infl corymbiform, with long, glandular or glandular-hairy peduncles commonly 3–10 cm; heads large, the invol (2.5–)3–4 cm wide, generally equaling or surpassing the fls, glabrous or slightly glandular, and often with a few long cobwebby hairs; achenes 6–7 mm; 2n=32, 36. Native of Eurasia, sparingly established as a weed along roadsides and in waste places over most of the n. U.S. and adj. Can. Aug.–Oct."

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

     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).
    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.
    • B 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.
    • C Missouri Botanical Garden
    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.
    • D Flora of North America Association
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • E CC0 1.0 Universal (CC0 1.0).