Lysimachia europaea (formerly known as Trientalis europaea) is a flowering plant in the primrose family Primulaceae, called by the common name chickweed-wintergreen or arctic starflower. It is a small herbaceous perennial plant with one or more whorls of leaves on a single slender erect stem. It is about one third of a foot high (10 cm), giving it its generic name. The broad lanceolate leaves are pale green but take on a copper hue in late summer.... (Wikipedia)