darnel

noun2

1. •
   Any of the genus Lolium of grasses, especially as a weed in wheat fields.

   • With harlocks, hemlock, nettles, cuckoo-flowers, / Darnel, and all the idle weeds that grow / In our sustaining corn. — 1603
2. •
   Especially, the species Lolium temulentum, often host to a fungus toxic to humans and animals.