Passage 8.23.5
εἰ δὲ Ἑλλήνων τοῖς λόγοις ἑπόμενον καταριθμήσασθαι δεῖ με ὁπόσα δένδρα σῶα ἔτι καὶ τεθηλότα λείπεται, πρεσβύτατον μὲν ἡ λύγος ἐστὶν αὐτῶν ἡ ἐν τῷ Σαμίων πεφυκυῖα ἱερῷ Ἥρας, μετὰ δὲ αὐτὴν ἡ ἐν Δωδώνῃ δρῦς καὶ ἐλαία τε ἡ ἐν ἀκροπόλει καὶ ἡ παρὰ Δηλίοις· τρίτα δὲ ἕνεκα ἀρχαιότητος νέμοιεν ἂν τῇ δάφνῃ τῇ παρὰ σφίσιν οἱ Σύροι· τῶν δὲ ἄλλων ἡ πλάτανός ἐστιν αὕτη παλαιότατον.
If, following the traditions of the Greeks, I must enumerate how many trees remain that are still alive and flourishing, the oldest among them is the willow growing in the sanctuary of Hera on Samos; after this come the oak at Dodona, and the olive tree on the Acropolis, and also the one among the Delians. Third in antiquity, according to the Syrians themselves, would be their laurel; but of all the others, this plane-tree is the oldest.