Cirsium

Genus of flowering plants in the daisy family

Cirsium is a genus of perennial and biennial flowering plants in the Asteraceae, one of several genera known commonly as thistles. They are more precisely known as plume thistles. These differ from other thistle genera (Carduus, Silybum and Onopordum) in having a seed with a pappus of feathered hairs on their achenes.

From Wikipedia, under CC BY-SA. More on occurri.