χελιδόνιον
From LSJ
ἀλλ᾽ ἀμφὶ τοῖς σφαλεῖσι μὴ 'ξ ἑκουσίας ὀργὴ πέπειρα → to those who err in judgment, not in will, anger is gentle | men's wrath is softened toward those who have erred unwittingly
English (LSJ)
τό,
A celandine, Chelidonium majus, Thphr.HP7.15.1, Ath.15.684e; χ. τὸ μέγα Dsc.2.180. 2 = ἄμπελος λευκή, Id.4.182. 3 χ. τὸ μικρόν pilewort, Ranunculus Ficaria, Id.2.181. II young swallow, Gal.14.386.