Cirsium oleraceum

Cirsium oleraceum, the cabbage thistle or Siberian thistle, is a species of thistle in the genus Cirsium within the family Asteraceae, native to central and eastern Europe and Asia, where it grows in wet lowland soils. Cirsium oleraceum is a herbaceous perennial plant growing to 1.5 m tall, the stems unbranched or with only a very few branches. The leaves are broad and ovoid, with a weakly spiny margin, being pinnatipartite. The flowers are produced in dense flower heads which are 2.5–4 cm diameter, pale yellow, but sometimes tinged pink. Its specific epithet oleraceum means "vegetable/herbal" in Latin and is a form of holeraceus (oleraceus)....read more on Wikipedia.