Mine is Goutweed. It will not go away. I dig it and
dig it and keep on ripping it out and within a week it's thriving once again. I have never had such a horrible experience with a weed.
Mine is bindweed. It comes up again from the roots so you have to keep hoeing it down.
It is almost impossible to get rid of.
Here is a link that might be useful: bindweed
I don't think I have ever seen Goutweed. But here is a link to it.
Here is a link that might be useful: Goutweed
It's a tie between spotted spurge and oxalis. The more I pull, the more it comes back. I'm losing my will to pull :(
Yellow Starthistle and Russian Starthistle, both are very hard to control and to eradicate, can produce thorn heads that flaten garden tractor tires and very poisonous to Horses.
Last year, it was rattlesnake weed. Ealier this year, it was oxalis. Now, its chamber bitter.