Cerastium arvense print of plant. liurig.altervista.org (Accessed 12/20140).

Cerastium is a genus of low, small herbs. 

Leaves opposite, generally small. 

Cerastium nutans flower close-up. Copyright © 2017. Robert L. Carr, Flora of Eastern Washington. Oregon Flora Image Project – www.botany.hawaiie du/faculty/carr/ofp/ofp_index (Accessed 12/2017).

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. 

Cerastium glomeratum fruit. Photo by Alessandro Alessandrini. luirig.altervista.org (Accessed 12/2017).

Notes: Much like Stellaria but darker green and generally hairier.