The world wide web has enough entries about assumptions about this topic. There are also replicas of the Sarissen. Unfortunately not in the original material. Cornelian cherry stands like carbon fiber. Everything else is lax, like fiberglass, as a modern comparison.
From a reliable source an original report from a serious observer. The the greek globetrotter Xenophon is the only civilian in the history of war. Anyone who did not speak Greek was a barbarian. Let's now hear what the less well-equipped barbarians did with a small war vanguard.
"When they came to a hand-to-hand encounter, all of the Greeks who struck anyone broke their spears, while the barbarians, being armed with javelins of cornel-wood, speedily killed twelve men and two horses. Thereupon the Greeks were turned to flight. But when Agesilaus came to the rescue with the hoplites, the barbarians withdrew again and one of them was killed."
Xenophon, Hellenica, Book 3, chapter 4, section 14
"Most of the time he pursued his march through the country in safety; but when he was not far from Dascyleium, his horsemen, who were going on ahead of him, rode to the top of a hill so as to see what was in front. And by chance the horsemen of Pharnabazus, under the command of Rhathines and Bagaeus, his bastard brother, just about equal to the Greek cavalry in number, had been sent out by Pharnabazus and likewise rode to the top of this same hill. And when the two squadrons saw one another, not so much as four plethra apart, at first both halted, the Greek horsemen being drawn up four deep like a phalanx, and the barbarians with a front of not more than twelve, but many men deep. Then, however, the barbarians charged."
Xenophon, Hellenica, Book 3, chapter 4, section 13
The dispute fail described here took place on the soil of Asia Minor.
Against the Persians. The Greek, they had known the material. I wonder why ? The famous Macedonian phalanx already existed at this time. Maybe the Greeks got bloody heads also in Macedonia. The neighboring countries of macedonia and greece are still green not together by the time green today.
Because of this incident, the literate Greeks learned to use the Cornelian cherry as a source of material. About 300 years later, Ovid multi reports of the cornelian cherry with the burden of iron ore. It must have been huge areas planted with cornelian cherries.