Found this article:
Some gardeners call it the Velcro plant. Others know it as Cleavers or Sticky Weed. My favorite common name for Galium aparine? Sticky Willy.
But no matter what you call it, if you do any kind of yard work or gardening, you’ve probably rubbed up against this annual whose seeds germinate in the cool wet weather of late winter and then grow rapidly into swirly, sticky stems of green that glue themselves to your fence, your pets, and your socks.