Can someone identify this voracious weed?!
This very invasive weed has had my dad digging for weeks trying to eradicate it from his garden in Indiana. At first glance it looks like ragweed, but it is not; the roots run through the ground and the stem has multiple leaves going down it. It does not seem to bloom and reached a height of about 18 inches.
http://weedid.wisc.edu/ca/weedid.php