Asterium
Stephanus of Byzantium relates that the place was later called Peiresia ( Πειρεσία ) , no doubt from the "Argonautica" of Apollonius of Rhodes who describes the place as near the junction of rivers Apidanus ( the modern Pharsalitis ) and Enipeus . 
<triplet> Argonautica <subj> Apollonius of Rhodes <obj> author