I'm having trouble identifying this weed. It grows like a mat on the ground and over rocks/barriers, very shallow roots, very small white flowers, long thin leaves. I live in central Connecticut.
Galium, sometimes called velcro weed.
See all those buds? That means flowers, then seeds. Lots!
AKA Sweet Woodruff.
Here is a link that might be useful: Sweet Woodruff
Looks more like carpetweed, Mollugo verticillata to me.
Here is a link that might be useful: Carpetweed
The Galium I referred to is also called catchweed.
Here is a link that might be useful: velcro plant; aka catchweed, not woodruff
We call it "bedstraw" but still looks like carpetweed to me. Bedstraw is fuzzy, with no sheen. Doesn't match the OP's picture.
OP, straighten us out.
I agree with Jean....Galium aparine.
i have the same thing all over the cracks in my paver patio!
Galium aparine is what I think it is. That is not the same as Sweet Woodruff, which is Galium odoratum. Common names here are Goosegrass, Cleavers and Sticky Willy.