Galeopsis segetum, commonly known as downy hemp-nettle, is a species of flowering plant in the sage family, Lamiaceae. It grows as a weed in arable ground throughout Europe. Although superficially resembling the stinging nettle it is of a different family and does not sting.
The yellow hollow tooth or seed hollow tooth (Galeopsis segetum) is a type of plant from the genus hollow tooth (Galeopsis) within the mint family (Lamiaceae).
This plant is useful.
This plant might be poisonous
How to get rid of: