Gewöhnliche Waldrebe (Clematis vitalba) am Messplatz in Hockenheim
Ausgewilderter Garten-Feldrittersporn (Consolida ajacis) am Messplatz in Hockenheim
Occasional liane over grey scrub around schist outcrops. Either C. marata or C. quadribracteolata - I think the latter most likely
Local on damp thin soils on banks above lake
This flower reminds me a little of Hemp Agrimony, but that idea led me to a dead-end and no others are immediately coming to mind.