Plumbago europaea
From LSJ
Ἔπαινον ἕξεις, ἂν κρατῇς, ὧν δεῖ κρατεῖν → Laus est, si, quibus est imperandum, tu imperes → Lob hast du, wenn du herrschst, worüber zu herrschen gilt
Wikipedia EN
Plumbago europaea, also known as the common leadwort, is a plant species in the genus Plumbago found in the Mediterranean Basin and Central Asia. Plumbago europaea produces the flavonol europetin.
