A comprehensive analysis of ancient texts and non-written sources, taking into account the indirect information contained in them, made it possible to reliably determine that the extinct plant, Cyrene silphium, belongs to the genus Angelica (Archangelica sp.). Silphium from Syria and the mysterious Greek magidaris are reliably identified as angelica (Angelica sylvestris), and silphium from Media as purple angelica, previously considered xanthogalum (Angelica purpurascens syn. Xanthogalum purpurascens). Below you can find out exactly what type of silphium, including the modern Latin name, the soldiers of Alexander the Great seasoned raw donkey meat while crossing the Hindu Kush, find out how silphium juice was collected and processed in ancient times, where to look for Pontine silphium, and at the same time get acquainted with other interesting and promising information for further use about this useful but extinct weed.