Arizona Thistle ( Cirsium arizonicum ) is a member of the sunflower family and common across the south west. The thistle has a two year live span. For the first year, it thrives as a low lying rosette of thorns. The second year of life, the plant springs into action and can grow up to four feet tall and grows a flower stalk to hold a purple colored flower head high into the air. The flower is known to bloom in red, pink and purple in color.
