I have it growing around the yard too, was reading about it now that I know the name.

It's medicinal somehow, but I just pull it up.

Thanks so much! I even pulled some up and walked into Lowes with it, hoping SOMEONE could tell me and nope!

One common name is wireweed, although it may or may not be this exact species. Note: considered good for a number of Lepidoptera (butterflies) species......so you may want to withhold the pulling.

Mature ones have long, tough taproots, IMPE. I make sure to get the whole thing or they just grow back. I have better plants for butterflies - & the little seeds have spines that hurt...

If you keep one for butterflies, they aren't actually ugly plants. They do have cute little yellow flowers, and you can prune them to keep it bushy. One of my neighbors loved hers, and treated it like a prized plant. When she moved, the new residents dug it up immediately.