Galium tricornutum is a species of flowering plant in the coffee family known by the common names
rough corn bedstraw,
roughfruit corn bedstraw, and
corn cleavers. It is widespread across most of Europe plus northern Africa and southern Asia, from Norway, Portugal and Morocco to China. It is also naturalized in Australia, the Canary Islands, Mauritius, Madeira, Réunion, Brazil, Argentina, and scattered locales in North America (mostly California and Oregon).
(Wikipedia)