ζιζάνιον
From LSJ
Ποιητὴς, ὁπόταν ἐν τῷ τρίποδι τῆς Μούσης καθίζηται, τότε οὐκ ἔμφρων ἐστίν → Whenever a poet is seated on the Muses' tripod, he is not in his senses
English (LSJ)
τό, a weed that grows in wheat,
A = αἶρα 11, prob. darnel, Lolium temulentum, Gp.2.43, EM411.46: pl., Ev.Matt.13.25, Gp. 10.87.1. (Cf. Sumer. zizân 'wheat'.)