Flowers of Safflower yield
The flowers of safflower (Carthamus tinctorius) are occasionally used in cooking as a cheaper substitute for saffron. It is sometimes referred to as bastard saffron. The dried safflower petals are also used as a herbal tea variety. Dried safflowers are also used as a natural dye source for orange-red pigment carthamin (natural red pigment). It is also known as Carthamus red or natural red. So, the correct answer is 'Reddish dye'.