Arctic Starflower

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 10 cm, 3.9 in high. The broad lanceolate leaves are pale green but take on a copper hue in late summer. The solitary white flowers (1–2 cm, 0.39–0.79 in diameter, usually with 6–8 petals) are reminiscent of small wood anemones and appear in midsummer. The fruits are globular, dry capsules, but are seldom produced.

Lysimachia europaea occurs throughout boreal regions of Europe and Asia, but is absent from eastern North America, but can be found in the northwestern parts of the U.S. and parts of Canada. where it is largely replaced by Lysimachia borealis in corresponding habitats.