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 election for 93 BC.[1] Pliny[2] mentions the consulate of Herennius as remarkable for the quantity of Cyrenaic silphium -- Ferula tingitana[3] -- then brought to Rome. This costly drug was worth a silver denarius per pound; and the mercantile connections of the Herennii in Africa may have caused this unusual supply.