The Hollies has gardens including the National Plant Collection of Philadelphus. He lived in Alexandria during the reign of Ptolemy II Philadelphus (285-246 BC). Berenice became the mother of Arsinoe II, Philotera, and a son, Ptolemy II Philadelphus. He was left little choice but to turn to Ptolemy II Philadelphus in Egypt. An annual priesthood, known as the Canephorus of Arsinoe Philadelphus, was established by 269 BC. Anatolius of Laodicea incorrectly said that he lived in the time of Ptolemy Philadelphus. The fates of Alexander Helios and Ptolemy Philadelphus are unknown after this point. His royal title and full name was "Mithridates Philopator Philadelphus". In 285, Ptolemy made his son by Berenice, Ptolemy II Philadelphus, his co-regent. The name was given as an adulation to his own nickname, Philadelphus. After her death, Ptolemy II established a cult of Arsinoe Philadelphus. "Philadelphus" is named after an ancient Greek king of Egypt, Ptolemy II Philadelphus. Because of this, Ptolemy II Philadelphus banned Hegesias from teaching in Alexandria. Pharnaces' brother, MithridatesIV Philopator Philadelphus adopted a peaceful, pro-Roman policy. If Ptolemy Philadelphus survived to adulthood, proof of his survival has not been found.