Mentha arvensis

Mentha arvensis – also known as field mint wild mint, or corn mint – is a species of Mentha genera, family "Lamiaceae". 
It has circumboreal distribution. It is native to the temperate regions of Europe and western and central Asia. It is also found naturally in North America.
Description.
Field mint is a herbaceous perennial plant generally growing to and rarely up to tall. It has erect or semi-sprawling squarish stems. The leaves are paired in opposite positions. They are simple, long and broad. Leaves are hairy, and with a coarsely serrated margin. The flowers are pale purple, but rarely white or pink. These are in whorls on the stem at the bases of the leaves. Flower's Length is about . It has a five-lobed hairy calyx, a four-lobed corolla with the uppermost lobe larger than the others. It has four stamens. The fruit is a two-chambered carpel.