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

Source

German (Pape)

[Seite 1459] oder γναφάλιον, τό, eine Pflanze, deren Blätter die Walker brauchten, Diosc.