Your invasive weed in your woods is called Creeping Charlie or ground ivy. It is a member of the mint family and smells minty when the leaves are crushed. It reproduces by seeds and long stems that root at every node. If you dig it out you need to dispose of every piece or it may root. Creeping Charlie called be killed by herbicides when it is flowering and after the first frost in fall when it is preparing to go dormant. Repeat applications are often need to control the shade loving weed.