Saffron comes from a flower – crocus sativus aka saffron crocus.
It is mainly grown in Iran, Greece, Morocco, and India. 

For thousands of years saffron been sought after – as, medicine, a spice, a dye.

Saffron is the red stigma of Crocus sativus.

The crocus has three small stigmas – each have to be picked carefully by hand – resulting in a mere 0.006 grams of saffron from one stigma.