I don’t the location where this grow could only guess maybe something in the Galium genus. This could be a type of cleaver, goosegrass, velcro weed and sticky willy (Galium aparine)? check out link below and see if you have a match. best wishes! https://www.google.com/search?q=sticky+willy+weed&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjwwqXqj6nTAhXJ3YMKHdlaACsQiR4IiwE&biw=1722&bih=833#imgrc=6miXRwyGovjSUM: