Thalictrum delavayi

Chinese Meadow Rue. Thrives in rich, medium moisture, well-drained soils in full sun or part shade. Intolerant of hot and humid summers. Dappled shade is preferred. 100cm 

Excellent at the back of borders or emerging through lower shrubs as at Larnarch Castle. See the Hewitt's double form. 

Karelj, CC BY-SA 3.0 <https://creativecommons.org/licenses/by-sa/3.0>, via Wikimedia Commons (FIRST image)