Mentha arvensis wild mint

Information from USDA Plants Database
 
http://plants.usda.gov/java/profile?symbol=mear4

https://www.google.com/search?q=Mentha+arvensis+wild+mint&hl=en&source=lnms&tbm=isch&sa=X&ei=TpdKUYzuBaHQiwKFk4CYAw&ved=0CAcQ_AUoAQ&biw=1008&bih=522