Stellaria alsine, the bog stitchwort, is a species of herbaceous perennial flowering plant in the carnation family Caryophyllaceae. It grows in bogs and marshes in Europe and parts of North America.
Bog stitchwort is a rhizomatous perennial plant, with smooth, four-angled stems up to 40 cm (16 in) tall. Its leaves are opposite and narrow, up to 13 mm (0.51 in) long, with untoothed margins but a few marginal hairs towards the leaf-base. The flowers are borne in cymes of 1–5, arising from the axils ...