Cardamine amara

Cardamine amara, known as large bitter-cress, is a species of flowering plant in the family Brassicaceae. It is a perennial with upright, mostly unbranched, stems to 70 cm tall, and leaves made up of between three and 13 leaflets. The flowers have petals that are 8 – long and are generally white, although sometimes pink or purple. It is found in damp places.