in german language because of the "running roots" in a line also called "soldiers sedge"
🇬🇧 An only plant among Mercurialis perennis and Galium odoratum. Near a brook (Kohlflössel) in a small valley on the south-eastern slope of Weberberg, which, compared to the northern slopes between Lausche and this place hosts very rich vegetation (the geological map shows Weinberg is built of phonolite).
am Heidehäuser Weg sehr häufig.
likely A. vulgaris
Suggested by iNaturalist AI. I don't know the oaks here.
Possibly planted or escaped.