The Augustan poet Ovid gives Abundantia a role in the myth of Acheloüs the river god, one of whose horns was ripped from his forehead by Hercules. The horn was taken up by the Naiads and transformed into the cornucopia that was granted to Abundantia. (Other aetiological myths provide different explanations of the cornucopia's origin.) On Neronian coinage, she was associated with Ceres and equated with Annona, who embodied the grain supply. Like Annona, Abundantia was a "virtue in action" in such locations as the harbor, where grain entered the city.