Random FactsCuriousOneJanuary 05, 2016ancient, believed, contraceptive, Extinct, plant, silphium, Species, UsedComment "Silphium" is an extinct plant species, suspected to be used as an Ancient Roman contraceptive Random FactsCuriousOneJanuary 05, 2016ancient, believed, contraceptive, Extinct, plant, silphium, Species, UsedComment