繁缕（学名：Stellaria media）属石竹科繁缕属植物，为原野杂草。

一年生小草本；茎纤弱，圆柱形，有纵棱，一侧有短柔毛，余全无毛，平铺地面，叉状分枝；叶卵形，小对生，先端锐尖，质脆易碎；春夏开白色小花，聚伞花序，位于枝顶端或叶腋；花梗纤细；花萼5；花瓣5，深二裂；花柱三枚。

Stellaria media, chickweed, is a cool-season annual plant native to Europe, but naturalized in many parts of North America. It is used as a cooling herbal remedy, and grown as a vegetable crop and ground cover for both human consumption and poultry. It is sometimes called common chickweed to distinguish it from other plants called chickweed. Other common names include chickenwort, craches, maruns, winterweed. The plant germinates in autumn 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.