Sonchus palustris, commonly known as marsh sowthistle, is a plant native to temperate regions of the Europe, Russia, Central Asia, and the Province of Xinjiang in western China. It has also become naturalized in a few locations in the Canadian Province of Ontario. Sonchus palustris can be found in damp peaty or silty soils rich in nitrogen. It is a perennial herb sometimes as much as 350 cm (almost 12 feet) tall. It produces an array of numerous flower heads, each with numerous yellow ray flowers but no disc flowers.