"Marcus Herennius was consul of the Roman Republic in 93 BC. Although a plebeian and an indifferent orator, he defeated Lucius Marcius Philippus in the consular ...
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election for 93 BC. Pliny mentions the consulate of Herennius as remarkable for the quantity of Cyrenaic silphium -- Ferula tingitana -- then brought to Rome. This costly drug was worth a silver denarius the pound; and the mercantile connections of the Herennii in Africa may have caused this unusual supply." - (en.wikipedia.org 21.06.2020)