Passage 10.36.7
τὰ δὲ ὄρη τὰ ὑπὲρ τὴν Ἀντίκυραν πετρώδη τε ἄγαν ἐστὶ καὶ ἐν αὐτοῖς φύεται μάλιστα ὁ ἐλλέβορος. ὁ μὲν αὐτοῦ μέλας χωρεῖ τε ἀνθρώποις καὶ ἔστι γαστρὶ καθάρσιον, ὁ δὲ ἕτερος ὁ λευκὸς διʼ ἐμέτου καθαίρειν πέφυκε· τὸ δὲ φάρμακον τὸ ἐς τὴν κάθαρσιν ἡ τοῦ ἐλλεβόρου ῥίζα ἐστίν.
The mountains above Anticyra are extremely rocky, and it is there especially that hellebore grows. Its black variety is suitable for human use and serves as a purgative for the stomach, whereas the other, white hellebore, causes purification through vomiting. The medicinal purging agent lies in the root of the hellebore plant.