Cerastium is a genus of low, small herbs.
Leaves opposite, generally small.
Flowers white, petals 5, free, widest near tip, narrowed at base, tip often notched, sepals 5 (in ours), stamens 10, styles 5, ovary superior.
Fruit dry, a capsule, mostly longer than sepals, cylindrical, thin-walled, splitting open at tip leaving 10 small teeth at opening; seeds numerous, warty-textured.
Notes: Much like Stellaria but darker green and generally hairier.