dstvns said:

Is this the one? It is my weed from hell. This thing makes rabbits
look sterile. You pull it out, it comes back. You do *anything*, it
comes back. I'm pretty sure it's an annual, since mulch in late fall
kills the seeds (makes them sprout then winter kills them). This has
been my only effective means of control, other than temporary pulling
during the growing season.

http://home.ptd.net/~vstevans/Jul13_01.jpg

It's a type of smartweed or knotweed (Polygonum). Can't identify it more
specifically than that.

--
Pat in Plymouth MI

Any technology distinguishable from magic is insufficiently advanced.
(attributed to Don Marti)