Marshmallow (Malva parviflora) also known as Small-Flowered Mallow is a hard to kill annual/biannual weed.
It is found on driveways, industrial areas, animal yards, pastures and under trees where livestock congregate.
Marshmallow is difficult to control due to its natural tolerance to glyphosate.
It is generally noticed in yards after an area has been sprayed with a knockdown herbicide like glyphosate and all the weeds except marshmallow die.