Stellaria media

Stellaria media, common chickweed, is a cool-season annual plant native to Europe, which is often eaten by chickens. It is commonly also called Chickenwort, Craches, Maruns, Winterweed. The plant germinates in fall or late winter, then forms large mats of foliage. Flowers are small and white, followed quickly by the seed pods. This plant flowers and sets seed at the same time.