Corn sow thistle

Sonchus arvensis
Aster family (Asteraceae)

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Sonchus arvensis, the field milk thistle, field sowthistle, perennial sow-thistle, corn sow thistle, dindle, gutweed, swine thistle, or tree sow thistle, is a species of flowering plant in the family Asteraceae. S. arvensis often occurs in annual crop fields and may cause substantial yield losses.


The plant grows up to 1.5 metres (4 ft 11 in) in height,: 744  with leaves 10–35 cm (4–13+34 in) long and 4–14 cm (1+125+12 in) wide. It produces conspicuous yellow flowerheads about 3–5 cm (1+14–2 in) wide, which are visited by various types of insects—especially hoverflies of the genus Eristalis.


Sonchus arvensis is native to Eurasia, where it is widespread across most of the continent. It has also become naturalized in many other regions, and is considered an invasive noxious weed in some places, such as North America (including Prince Edward Island), Russia, New Zealand, and Australia.

It grows in areas such as pastures, roadsides, bushlands and the shorelines of lakes, rivers and sea coast.


The young leaves, when less than a few inches long and not bitter in taste, can be mixed with other greens to make salad. They can also be boiled in a small quantity of water, changed once. The plant can contain toxic nitrates.



External links

  • photo of herbarium specimen at Missouri Botanical Garden
  • "Sonchus arvensis (perennial sowthistle)". Invasive Species Compendium. 2019-11-19. Retrieved 2020-11-17.



WWW info


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Sharp-fringed sow thistle
Corn sow thistle
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Sonchus arvensis [L.]
Sonchus arvensis
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