πολεμώνιον
From LSJ
Τί κοινότατον; ἐλπίς. καὶ γὰρ οἷς ἄλλο μηδέν, αὕτη πάρεστι → What is most common? Hope. For those who have nothing else, that is always there.
English (LSJ)
τό, name of a plant,
A Hypericum olympicum, Dsc.4.8. 2 ἡ πολεμώνιος βοτάνη horsemint, Mentha longifolia, Hippiatr. 32; called πολεμώνιον, τό, ibid.; πολεμωνία βοτάνη ib.86.