κναφάλιον
From LSJ
εἰ δὲ τύχῃ τις ἔρδων, μελίφρον' αἰτίαν ῥοαῖσι Μοισᾶν ἐνέβαλε → if someone is successful in his deeds, he casts a cause for sweet thoughts into the streams of the Muses
German (Pape)
[Seite 1459] oder γναφάλιον, τό, eine Pflanze, deren Blätter die Walker brauchten, Diosc.