This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Stellaria cerastioides L. Sp. Pl. 422. 1753.
Cerastium trigynum Vill. Hist. Pl. Dauph. 3: 645. 1789.
Perennial, glabrous except a line of minute hairs along one side of the stem and branches, rarely pubescent throughout. Flowering branches ascending, 3'-6' long; leaves linear-oblong, 4"-8" long, about 1" wide, obtuse, the lower often smaller and slightly narrowed at the base; flowers solitary or few, 5"-6" broad, long-pedicelled; petals 2-lobed, mostly twice as long as the obtuse or acutish scarious-margined sepals; capsule nearly straight, twice the length of the calyx; styles 3, rarely 4 or 5; sepals and petals 5 or 4.