cockle

The two names used in the original text point to plants of quite different characters

1) a general term applicable to all ill-smelling and harmful plants

2) the bearded darnel, the only grass with a poisonous seed

Hence the rendering in both Douay and Authorized versions is inaccurate.

It is mentioned in the parable of the man who sowed good seed in his field, but whose enemy came and oversowed cockle in the wheat (Matthew 13).