Indeed, the Romans loved it so much, they referenced their darling herb in poems and songs, and wrote it into great works of literature. For centuries, local kings held a monopoly on the plant, which made the city of Cyrene, at modern Shahhat, Libya, the richest in Africa. Before they gave it away to the Romans, the Greek inhabitants even put it on their money. Julius Caesar went so far as to store a cache (1,500lbs or 680kg) in the official treasury.
But today, silphium has vanished – possibly just from the region, possibly from our planet altogether. Pliny wrote that within his lifetime, only a single stalk was discovered. It was plucked and sent to the emperor Nero as a curiosity sometime around 54-68AD.
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Well I don’t believe it’s extinct, I believe it’s out there, in the wild, gone feral but still retaining all it’s powers over coughs, colds and sore holes.