Sonchus arvensis L.
  • Sp. Pl.

Cite taxon page as 'WFO (2020): Sonchus arvensis L. Published on the Internet; Accessed on: 21 Sep 2020'

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: [B].New York Botanical Garden
    • Source: [
    • 1
    • ]. 


    • 1 "Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp."
    • 2 Sp. Pl.

     Information From

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    New York Botanical Garden
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    World Flora Online consortium
    World Flora Online Data. 2018.
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