Spiny, sometimes hairless stems, sometimes covered with woolly hair. Leaves woolly underneath and a rough on top.
Flower-heads are showy, purple, thistle-like flower-heads without obvious petals. They are made up of many small, purple, tubular florets.
Seeds have feathery bristles that surround the seed and allow it to be spread long distances by the wind.
Declared noxious in Victoria, South Australia and Tasmania.
Photo: Matt Tomkins