a tough green weed

It is small, but contains a thick stem. On its leaves are small burrs which stick to clothing and fur. At the top is a small flower with five yellow petals.

It is a tough green weed.
It weighs a couple of pounds.

You identify a tough green weed.
It is a plant.
It weighs one pound and ten ounces, and it is worth about one celeb and fifty busc.
Its keywords are weed and tough.