Cardamine trifolia

Cardamine trifolia, the trefoil cress, trifoliate bittercress, or three-leaved cuckoo flower, is a species of flowering plant in the family Brassicaceae. It is native to central and southern Europe, and has been introduced to Great Britain. It appears to have spread from glacial refugia in the Austrian Alps, the western Carpathians, and a part of northern Italy extending into the Dinaric Alps of the former Yugoslavia. A creeping perennial, in the garden it is recommended as a ground cover in shady areas.