Trientalis

a genus of plants of the family Primulaceae. The plants are low perennial herbs with slender spreading rootstocks. The uneven leaves are verticillately approximate on the stem apex. The axillary flowers, which are mostly seven-parted, are solitary or in groups of two to four on long, slender pedicels. The corolla is white and rotate; the fruit is a globose capsule. There are three to four species, distributed in the temperate and frigid zones of the northern hemisphere. The USSR has two species: T. europaea and T. arctica. The former grows in spruce forests and, less commonly, in mixed forests, thickets, felled forests, and parks. T. arctica grows in the tundras and mountains of Eastern Siberia and the Far East.