Alpine Penny-Cress, Thlaspi caerulescens subsp. calaminaria
This plant is a metallophyte, abundant in the grounds of the former Cd-Pb-Zn old mining and smelter site at Plombieres (Belgium). For more details see the two scientific references below.
''Thlaspi caerulescens'', Alpine Penny-cress and also known as alpine pennygrass, is a flowering plant in the family Brassicaceae. It is found in Scandinavia and Europe.