Boyd’s Bible Dictionary:
(tears). The darnel is supposed to be meant. It grows somewhat like wheat till near ripening time, and chokes the growth of cereals (Matt. 13:25-30).
Concise Bible Dictionary:
A noxious weed, known as darnel. It closely resembles wheat until it is in ear. At the approach of the harvest it can be distinguished, and women and children have been seen in Palestine picking out the tall stalks of ziwân, as it is called by the Arabs. It is the Lolium temulentum. In the parable of the Wheat and Tares the Lord compares to tares those introduced into the kingdom by Satan, who will be consumed in judgment (Matt. 13:25-40). See PARABLES.
Lolium Temulentum