Doc, once you get a few pics posted, we'll verify what plant it is. I've been there done that with waterleaf, and I'm hoping for your sake, it's something else. Treatment must be very aggressive to totally eliminate the plant and its offshoots.

IIRC, waterleaf pops up a little later than most emergents, so the plant should be confirmable by late April or early May at the latest.

CMM, my goats won't touch waterleaf, but they may be a tad spoiled.

AL