Silphium
Silphium was a plant that was used in classical antiquity as a seasoning and as a medicine. It is also known as silphion, laserwort, or laser. It was the essential item of trade from the ancient North African city of Cyrene. Most of the coins from Cyrene show a picture of the plant. The valuable product was the plant's resin (called laser, laserpicium, or lasarpicium).