βλάχνον
From LSJ
αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point
English (LSJ)
τό, = βλῆχνον, Phan.Hist.25, Sch.Nic.Th.39:—also βλάθρον and βλάχρον, Hsch.
Spanish (DGE)
-ου, τό
• Alolema(s): βλῆχνον Dsc.4.184 (cód.)
bot. helecho macho, Aspidium filix-mas Phan.37, Dsc.l.c., Plin.HN 27.28, Arr.Bith.68, Pelagon.484, Hsch.s.u. βλάθρον, Sch.Theoc.5.55a.