An annual herb of about 30 cm high, with an erect, branched stem, delicate, deep-lobed leaves, blue to gray flowers, and pods and serrated seeds, native to the Arabian Peninsula, the Levant, the Maghreb, Iran, India and Pakistan. It is grown in many parts of Asia and the Mediterranean region. Constitution of the Greek physician (a famous Greek physician who lived in the first century AD) reported that the seeds of the black seed are taken to treat headaches, nasal distress, toothache, and infectious worms, and it is also taken in large quantities as a diuretic and to induce menstruation and increase milk flow.