Silphium (also known as laserwort or laser; Ancient Greek: σίλφιον, sílphion) is an unidentified plant that was used in classical antiquity as a seasoning, perfume, aphrodisiac, and medicine.[1][2]
It was the essential item of trade from the ancient North African city of Cyrene, and was so critical to the Cyrenian economy that most of their coins bore a picture of the plant. The valuable product was the plant's resin, called in Latin laserpicium, lasarpicium or laser (the words Laserpitium and Laser were used by botanists to name genera of aromatic plants, but the silphium plant is not believed to belong to these genera).
The exact identity of silphium is unclear. It was claimed to have become extinct in Roman times.[3] It is commonly believed to be a relative of giant fennel in the genus Ferula.[1][4][5] The extant plant Thapsia gummifera[6] has been suggested as another possibility. Another theory is that it was simply a high quality variety of asafoetida, a common spice in the Roman Empire. The two spices were considered the same by many Romans including the geographer Strabo.[7]
Silphium was considered invaluable by all who held it. The BBC reports that the plant was sung about in Roman poems and songs, who considered it equivalent to its weight in gold.[2] Historically, Pliny the Elder blamed silphium's valuation on "tax-farmers," and Julius Caesar directly registered silphium as "1500 pounds of laser" in the Roman treasury.[8]
PlinyXIX
was invoked but never defined (see the help page).