Note 635 — BOOK XXV. THE NATURAL HISTORY OF THE WILD PLANTS.
John Bostock translation
Its names were derived from Polemon, a king of Pontus, and Philetærus, a king of Cappadocia. It is generally identified with the Polemonium cæruleum of Linnæus, Greek valerian, or Jacob’s ladder. M. Fraäs suggests that it may be the Hypericum Olympicum of Linnæus, with which he also identifies the Panaces chironion.